This documentation is generally for emerging search technology apache solr .
Solr is a standalone enterprise search server with a REST-like API. You put documents in it (called "indexing") via XML, JSON, CSV or binary over HTTP. You query it via HTTP GET and receive XML, JSON, CSV or binary results.
Apache Solr is an open-source search platform that allows users to index and search large volumes of textual data. It works by indexing documents that are added to its cores, or indexes, and then allows users to query those indexes to retrieve relevant results. Some key uses of Solr include powering search engines, enabling geospatial search, and performing analytics on large datasets. The document outlines how to install and run Solr, configure cores, and introduces some basic Solr concepts like schemas, documents, fields, analyzers, and queries. It also briefly discusses some alternatives to Solr like Elasticsearch and Algolia.
Letting In the Light: Using Solr as an External Search ComponentJay Luker
Letting In the Light: Using Solr as an External Search Component
* Jay Luker, IT Specialist, ADS, jluker@cfa.harvard.edu
* Benoit Thiell, software developer, ADS, bthiell@cfa.harvard.edu
Code4Lib 2011, Tuesday 8 February, 14:30 - 14:50
It’s well-established that Solr provides an excellent foundation for building a faceted search engine. But what if your application’s foundation has already been constructed? How do you add Solr as a federated, fulltext search component to an existing system that already provides a full set of well-crafted scoring and ranking mechanisms?
This talk will describe a work-in-progress project at the Smithsonian/NASA Astrophysics Data System to migrate its aging search platform to Invenio, an open-source institutional repository and digital library system originally developed at CERN, while at the same time incorporating Solr as an external component for both faceting and fulltext search.
In this presentation we'll start with a short introduction of Invenio and then move on to the good stuff: an in-depth exploration of our use of Solr. We'll explain the challenges that we faced, what we learned about some particular Solr internals, interesting paths we chose not to follow, and the solutions we finally developed, including the creation of custom Solr request handlers and query parser classes.
This presentation will be quite technical and will show a measure of horrible Java code. Benoit will probably run away during that part.
Apache Lucene is a high-performance, full-featured text search engine library written in Java. It provides indexing and searching capabilities over various document formats. The Lucene architecture involves indexing documents, building queries, searching the index, and returning results. Core classes for indexing include IndexWriter, Directory, Analyzer, Document, and Field. Core searching classes are IndexSearcher, Query, QueryParser, TopDocs, and ScoreDoc. A demo was presented to index and search documents using Lucene's core classes.
This document provides an overview of Lucene scoring and sorting algorithms. It describes how Lucene constructs a Hits object to handle scoring and caching of search results. It explains that Lucene scores documents by calling the getScore() method on a Scorer object, which depends on the type of query. For boolean queries, it typically uses a BooleanScorer2. The scoring process advances through documents matching the query terms. Sorting requires additional memory to cache fields used for sorting.
This document discusses building distributed search applications using Apache Solr. It provides an agenda that covers topics such as Solr architecture, schema configuration, indexing data, querying, SolrCloud, and performance factors. It also references a demo app that will be used for hands-on examples during the presentation.
Apache Lucene starter for developers and novices, illustrates simple code example. complete source code can be found on - https://github.com/ani03sha/lucene-starter
This document provides an overview of searching and Apache Lucene. It discusses what a search engine is and how it builds an index and answers queries. It then describes Apache Lucene as a high-performance Java-based search engine library. Key features of Lucene like its powerful query syntax, relevance ranking, and flexibility are outlined. Examples of indexing and searching code in Lucene are also provided. The document concludes with a discussion of Lucene's scalability and how it can handle increasing query rates, index sizes, and update rates.
Apache Solr is an open-source search platform that allows users to index and search large volumes of textual data. It works by indexing documents that are added to its cores, or indexes, and then allows users to query those indexes to retrieve relevant results. Some key uses of Solr include powering search engines, enabling geospatial search, and performing analytics on large datasets. The document outlines how to install and run Solr, configure cores, and introduces some basic Solr concepts like schemas, documents, fields, analyzers, and queries. It also briefly discusses some alternatives to Solr like Elasticsearch and Algolia.
Letting In the Light: Using Solr as an External Search ComponentJay Luker
Letting In the Light: Using Solr as an External Search Component
* Jay Luker, IT Specialist, ADS, jluker@cfa.harvard.edu
* Benoit Thiell, software developer, ADS, bthiell@cfa.harvard.edu
Code4Lib 2011, Tuesday 8 February, 14:30 - 14:50
It’s well-established that Solr provides an excellent foundation for building a faceted search engine. But what if your application’s foundation has already been constructed? How do you add Solr as a federated, fulltext search component to an existing system that already provides a full set of well-crafted scoring and ranking mechanisms?
This talk will describe a work-in-progress project at the Smithsonian/NASA Astrophysics Data System to migrate its aging search platform to Invenio, an open-source institutional repository and digital library system originally developed at CERN, while at the same time incorporating Solr as an external component for both faceting and fulltext search.
In this presentation we'll start with a short introduction of Invenio and then move on to the good stuff: an in-depth exploration of our use of Solr. We'll explain the challenges that we faced, what we learned about some particular Solr internals, interesting paths we chose not to follow, and the solutions we finally developed, including the creation of custom Solr request handlers and query parser classes.
This presentation will be quite technical and will show a measure of horrible Java code. Benoit will probably run away during that part.
Apache Lucene is a high-performance, full-featured text search engine library written in Java. It provides indexing and searching capabilities over various document formats. The Lucene architecture involves indexing documents, building queries, searching the index, and returning results. Core classes for indexing include IndexWriter, Directory, Analyzer, Document, and Field. Core searching classes are IndexSearcher, Query, QueryParser, TopDocs, and ScoreDoc. A demo was presented to index and search documents using Lucene's core classes.
This document provides an overview of Lucene scoring and sorting algorithms. It describes how Lucene constructs a Hits object to handle scoring and caching of search results. It explains that Lucene scores documents by calling the getScore() method on a Scorer object, which depends on the type of query. For boolean queries, it typically uses a BooleanScorer2. The scoring process advances through documents matching the query terms. Sorting requires additional memory to cache fields used for sorting.
This document discusses building distributed search applications using Apache Solr. It provides an agenda that covers topics such as Solr architecture, schema configuration, indexing data, querying, SolrCloud, and performance factors. It also references a demo app that will be used for hands-on examples during the presentation.
Apache Lucene starter for developers and novices, illustrates simple code example. complete source code can be found on - https://github.com/ani03sha/lucene-starter
This document provides an overview of searching and Apache Lucene. It discusses what a search engine is and how it builds an index and answers queries. It then describes Apache Lucene as a high-performance Java-based search engine library. Key features of Lucene like its powerful query syntax, relevance ranking, and flexibility are outlined. Examples of indexing and searching code in Lucene are also provided. The document concludes with a discussion of Lucene's scalability and how it can handle increasing query rates, index sizes, and update rates.
Apache Solr is an open-source enterprise search platform that provides fast, scalable, and reliable full-text search functionality. It powers the search capabilities of many large websites and applications. Some key features of Solr include fast indexing and search, faceted search, autocomplete, geospatial search, and integration with various databases and applications.
This document provides an overview of Apache Solr, an open source search platform based on Lucene. It discusses how Solr works, including indexing documents, defining schemas, querying the index via HTTP requests, and returning results in XML or JSON format. The document also provides examples of queries, updating the index, and customizing the analyzer for Thai language support.
Solr is an open source enterprise search platform built on Apache Lucene. It provides full-text search, hit highlighting, faceted search, and handles various document formats. Ajax-Solr is a JavaScript library that offers an autocomplete feature searching multiple fields and faceted search using tag clouds to interface with Solr. It follows the MVC pattern and can be deployed by customizing the configuration and fields used in examples/reuters-requirejs.
Building your own search engine with Apache SolrBiogeeks
Grow-your-own search engine
Solr is a search server built on Lucene that provides indexing, relevance ranking, and other search features through REST web services. It allows configuring search through XML without coding and is used by many large companies. Solr can index various data types including documents, databases, and crawled content. Queries are parsed and run against the index to return ranked search results based on factors like term frequency and inverse document frequency. Case studies show how Solr can improve search performance for databases like CATH by indexing its protein structure data.
1. The document provides an overview of basic Oracle financial functions including journal entries, document numbering, budgets, accounts payable, accounts receivable, and more.
2. Key functions of Oracle General Ledger include recording journal entries from other modules, assigning categories and sources to journal entries, and maintaining journals in batches.
3. The document describes how to enter journal entries including assigning document numbers, categories, periods, and reversal information. It also covers submitting journal batches for approval and entering journals for prior periods.
Lifecycle of a Solr Search Request - Chris "Hoss" Hostetter, LucidworksLucidworks
The document provides a deep dive into the lifecycle of a Solr search request, from the initial HTTP request to the generation of the response. It describes each stage of processing, including how the request is routed through the Solr core, how the query and filters are parsed and executed against the index, how various caches and plugins can be leveraged, and how the final response is generated. It uses examples of simple and more complex queries to demonstrate how each component interacts throughout the processing pipeline.
Introduction to Solr. A brief introduction to Solr for the resources who wants to get trained on Solr.
1. Introduction to Solr
2. Solr Terminologies
3.Installation and Configuration
4. Configuration files schema.xml and solrconfig.xml
5. Features of SOLR
a. Hit Highlighting
Auto Complete / Suggester
Stop words
Synonyms
SpellCheck
Geo Spatial Search
Result Grouping
Query Syntax
Query Boosting
Content Spotlighting
Block Record / Remove URL Feature
Content Spotlighting / Merchandising / Banner / Elevate
Block Record / Remove URL Feature
6. Indexing the Data
7. Search Queries
8. DataImportHandler - DIH
9. Plugins to index various types of Data (XML, CSV, DB, Filesystem)
10. Solr Client APIs
11. Overview of SOLRJ API
12. Running Solr on Tomcat
13. Enabling SSL on Solr
14. Zookeeper Configuration
15. Solr Cloud Deployment
16. Production Indexing Architecture
17. Production Serving Architecture
18. Solr Upgradation
19. References
Tutorial on developing a Solr search component pluginsearchbox-com
In this set of slides we give a step by step tutorial on how to develop a fully functional solr search component plugin. Additionally we provide links to full source code which can be used as a template to rapidly start creating your own search components.
Introduction to the basics of Information Retrieval (IR) with an emphasis on Apache Solr/Lucene. A lecture I gave during the JOSA Data Science Bootcamp.
Multi faceted responsive search, autocomplete, feeds engine & logginglucenerevolution
Presented by Remi Mikalsen, Search Engineer, The Norwegian Centre for ICT in Education
Learn how utdanning.no leverages open source technologies to deliver a blazing fast multi-faceted responsive search experience and a flexible and efficient feeds engine on top of Solr 3.6. Among the key open source projects that will be covered are Solr, Ajax-Solr, SolrPHPClient, Bootstrap, jQuery and Drupal. Notable highlights are ajaxified pivot facets, multiple parents hierarchical facets, ajax autocomplete with edge-n-gram and grouping, integrating our search widgets on any external website, custom Solr logging and using Solr to deliver Atom feeds. utdanning.no is a governmental website that collects, normalizes and publishes study information for related to secondary school and higher education in Norway. With 1.2 million visitors each year and 12.000 indexed documents we focus on precise information and a high degree of usability for students, potential students and counselors.
The document describes a presentation about rapidly prototyping with Solr. It will demonstrate ingesting documents into Solr, adjusting Solr's schema, and showcasing data in a flexible search UI. The presentation will cover faceting, highlighting, spellchecking, and debugging. Time will also be spent outlining next steps to develop and take the search application to production.
Search is everywhere, and therefore so is Apache Lucene. While providing amazing out-of-the-box defaults, there’s enough projects weird enough to require custom search scoring and ranking. In this talk, I’ll walk through how to use Lucene to implement your custom scoring and search ranking. We’ll see how you can achieve both amazing power (and responsibility) over your search results. We’ll see the flexibility of Lucene’s data structures and explore the pros/cons of custom Lucene scoring vs other methods of improving search relevancy.
Faceted search is a powerful technique to let users easily navigate the search results. It can also be used to develop rich user interfaces, which give an analyst quick insights about the documents space. In this session I will introduce the Facets module, how to use it, under-the-hood details as well as optimizations and best practices. I will also describe advanced faceted search capabilities with Lucene Facets.
Got data? Let's make it searchable! This presentation will demonstrate getting documents into Solr quickly, will provide some tips in adjusting Solr's schema to match your needs better, and finally will discuss how to showcase your data in a flexible search user interface. We'll see how to rapidly leverage faceting, highlighting, spell checking, and debugging. Even after all that, there will be enough time left to outline the next steps in developing your search application and taking it to production.
This document provides an introduction to SOLR, including why search engines are needed, what Lucene and SOLR are, the advantages of SOLR, SOLR architecture, query syntax, working with SOLR to feed and query data, and SOLR installation and configuration. Key topics covered include SOLR's ability to index and search structured and unstructured data in real-time, its sharding and replication capabilities for large datasets, and how SOLR configuration involves defining fields, field types, and dynamic fields in schema.xml.
This document provides an example of using SAX (Simple API for XML) to parse an XML document and print its outline or structure. It defines a PrintHandler class that extends the DefaultHandler and overrides startElement, endElement, and characters methods to print the start and end tags and first word of tag bodies as the document is parsed. The PrintHandler is used along with a SAXParser to parse an XML file and output its outline. This demonstrates a basic use of SAX to parse and process an XML document sequentially through event-based callbacks.
Apache Lucene: Searching the Web and Everything Else (Jazoon07)dnaber
Apache Lucene is a free and open-source search library that provides indexing and searching capabilities. It includes Lucene Java, a core Java library, Solr, a search server with web administration, and Nutch, an open-source web crawler and search engine. Lucene Java provides indexing and searching capabilities, Solr adds web-based administration and HTTP access, and Nutch crawls websites and indexes content.
This document provides an overview of using Apache Lucene and Solr for building a search engine. It outlines the basic search engine pipeline of crawling, parsing, indexing, ranking and searching data. It then introduces Lucene as a free and open source indexing and search library, describing its strengths like speed and flexibility. It provides examples of using the Lucene API for indexing, searching and deleting documents. Finally, it describes Apache Solr as a wrapper for Lucene that provides a REST API and administration interface for building search applications.
This document provides an overview of the search engine capabilities of Apache Solr/Lucene. It begins with an introduction to search engines and their capabilities. It then discusses Apache Lucene as a full-text search library and Apache Solr as an enterprise search platform built on Lucene. Key features of Lucene like indexing, querying, and its architecture are described. The document also explores Solr's features such as caching, SolrCloud, and its architecture. It provides examples of queries in Solr and references for further information.
- The document provides an overview of Apache Solr, an open source enterprise search platform. It discusses how to install and configure Solr, load sample data, and perform various search queries. It also offers tips for advanced search functionality, indexing, and scaling Solr for large datasets.
HOW TO USE APACHE SOLR TO THE FULLEST EFFORTS: A TECHNICAL EXPLORATION OF SEARCH INDEXING
A search tool improves a website's user experience by making it easier and faster for a user to find what they're looking for. Greater emphasis should be placed on huge, e-commerce, and dynamically updated websites (news sites, blogs).
One of the most well-liked search engines utilized by websites of all sizes is Apache Solr. It is a Java-based open-source search engine that enables you to look up information such as articles, goods, customer reviews, and more. In this article, we will examine Apache Solr in more detail.
What makes Apache Solr so well-liked?
Full-text search, hit highlighting, faceted search, real-time indexing, dynamic clustering, database integration, NoSQL features (non-relational database), and rich document handling are all features of Apace Solr Web Development that make it quick and versatile. These features include the ability to index a variety of document formats, including PDF, MS Office, and Open Office, as well as the ability to index new content instantly.
Some useful information regarding Apache Solr
As a search engine for their websites and publications, CNET Networks, Inc. initially created it. Later, it became an Apache top-level project after being open-sourced. Supports a variety of programming languages, including Ruby, PHP, Java, and Python. Additionally, it offers these languages' APIs.
Has integrated capability for geographic search, enabling location-based content searches. Particularly beneficial for websites like tourism and real estate portals. Use APIs and plugins to support sophisticated search capabilities like spell checking, autocomplete, and custom search. Use Lucene for searching and indexing. What is Apache Lucene An open-source Java search library called Lucene makes it simple to incorporate search or information retrieval into an application. It utilizes a robust search algorithm and is adaptable, strong, and accurate.
Although Lucene is best recognized for its full-text search capabilities, it may also be used to classify documents, analyze data, and retrieve information. Along with English, it also supports a wide variety of additional languages, including German, French, Spanish, Chinese, and Japanese.
Describe indexing
Indexing is the first step for all search engines. The conversion of original data into a highly effective cross-reference lookup to speed up search is known as indexing. Data is not directly indexed by search engines. Tokens (atomic components) are first separated out from the texts. Consulting the search index and obtaining the document that matches the query constitute searching.
Benefits of indexing
• Information retrieval that is quick and accurate (collects, parses, and saves)
• The search engine needs extra time to scan each document without indexing.
• indices of flow
• indices of flow
The document will first be examined and divided into tokens.
Apache Solr is an open-source enterprise search platform that provides fast, scalable, and reliable full-text search functionality. It powers the search capabilities of many large websites and applications. Some key features of Solr include fast indexing and search, faceted search, autocomplete, geospatial search, and integration with various databases and applications.
This document provides an overview of Apache Solr, an open source search platform based on Lucene. It discusses how Solr works, including indexing documents, defining schemas, querying the index via HTTP requests, and returning results in XML or JSON format. The document also provides examples of queries, updating the index, and customizing the analyzer for Thai language support.
Solr is an open source enterprise search platform built on Apache Lucene. It provides full-text search, hit highlighting, faceted search, and handles various document formats. Ajax-Solr is a JavaScript library that offers an autocomplete feature searching multiple fields and faceted search using tag clouds to interface with Solr. It follows the MVC pattern and can be deployed by customizing the configuration and fields used in examples/reuters-requirejs.
Building your own search engine with Apache SolrBiogeeks
Grow-your-own search engine
Solr is a search server built on Lucene that provides indexing, relevance ranking, and other search features through REST web services. It allows configuring search through XML without coding and is used by many large companies. Solr can index various data types including documents, databases, and crawled content. Queries are parsed and run against the index to return ranked search results based on factors like term frequency and inverse document frequency. Case studies show how Solr can improve search performance for databases like CATH by indexing its protein structure data.
1. The document provides an overview of basic Oracle financial functions including journal entries, document numbering, budgets, accounts payable, accounts receivable, and more.
2. Key functions of Oracle General Ledger include recording journal entries from other modules, assigning categories and sources to journal entries, and maintaining journals in batches.
3. The document describes how to enter journal entries including assigning document numbers, categories, periods, and reversal information. It also covers submitting journal batches for approval and entering journals for prior periods.
Lifecycle of a Solr Search Request - Chris "Hoss" Hostetter, LucidworksLucidworks
The document provides a deep dive into the lifecycle of a Solr search request, from the initial HTTP request to the generation of the response. It describes each stage of processing, including how the request is routed through the Solr core, how the query and filters are parsed and executed against the index, how various caches and plugins can be leveraged, and how the final response is generated. It uses examples of simple and more complex queries to demonstrate how each component interacts throughout the processing pipeline.
Introduction to Solr. A brief introduction to Solr for the resources who wants to get trained on Solr.
1. Introduction to Solr
2. Solr Terminologies
3.Installation and Configuration
4. Configuration files schema.xml and solrconfig.xml
5. Features of SOLR
a. Hit Highlighting
Auto Complete / Suggester
Stop words
Synonyms
SpellCheck
Geo Spatial Search
Result Grouping
Query Syntax
Query Boosting
Content Spotlighting
Block Record / Remove URL Feature
Content Spotlighting / Merchandising / Banner / Elevate
Block Record / Remove URL Feature
6. Indexing the Data
7. Search Queries
8. DataImportHandler - DIH
9. Plugins to index various types of Data (XML, CSV, DB, Filesystem)
10. Solr Client APIs
11. Overview of SOLRJ API
12. Running Solr on Tomcat
13. Enabling SSL on Solr
14. Zookeeper Configuration
15. Solr Cloud Deployment
16. Production Indexing Architecture
17. Production Serving Architecture
18. Solr Upgradation
19. References
Tutorial on developing a Solr search component pluginsearchbox-com
In this set of slides we give a step by step tutorial on how to develop a fully functional solr search component plugin. Additionally we provide links to full source code which can be used as a template to rapidly start creating your own search components.
Introduction to the basics of Information Retrieval (IR) with an emphasis on Apache Solr/Lucene. A lecture I gave during the JOSA Data Science Bootcamp.
Multi faceted responsive search, autocomplete, feeds engine & logginglucenerevolution
Presented by Remi Mikalsen, Search Engineer, The Norwegian Centre for ICT in Education
Learn how utdanning.no leverages open source technologies to deliver a blazing fast multi-faceted responsive search experience and a flexible and efficient feeds engine on top of Solr 3.6. Among the key open source projects that will be covered are Solr, Ajax-Solr, SolrPHPClient, Bootstrap, jQuery and Drupal. Notable highlights are ajaxified pivot facets, multiple parents hierarchical facets, ajax autocomplete with edge-n-gram and grouping, integrating our search widgets on any external website, custom Solr logging and using Solr to deliver Atom feeds. utdanning.no is a governmental website that collects, normalizes and publishes study information for related to secondary school and higher education in Norway. With 1.2 million visitors each year and 12.000 indexed documents we focus on precise information and a high degree of usability for students, potential students and counselors.
The document describes a presentation about rapidly prototyping with Solr. It will demonstrate ingesting documents into Solr, adjusting Solr's schema, and showcasing data in a flexible search UI. The presentation will cover faceting, highlighting, spellchecking, and debugging. Time will also be spent outlining next steps to develop and take the search application to production.
Search is everywhere, and therefore so is Apache Lucene. While providing amazing out-of-the-box defaults, there’s enough projects weird enough to require custom search scoring and ranking. In this talk, I’ll walk through how to use Lucene to implement your custom scoring and search ranking. We’ll see how you can achieve both amazing power (and responsibility) over your search results. We’ll see the flexibility of Lucene’s data structures and explore the pros/cons of custom Lucene scoring vs other methods of improving search relevancy.
Faceted search is a powerful technique to let users easily navigate the search results. It can also be used to develop rich user interfaces, which give an analyst quick insights about the documents space. In this session I will introduce the Facets module, how to use it, under-the-hood details as well as optimizations and best practices. I will also describe advanced faceted search capabilities with Lucene Facets.
Got data? Let's make it searchable! This presentation will demonstrate getting documents into Solr quickly, will provide some tips in adjusting Solr's schema to match your needs better, and finally will discuss how to showcase your data in a flexible search user interface. We'll see how to rapidly leverage faceting, highlighting, spell checking, and debugging. Even after all that, there will be enough time left to outline the next steps in developing your search application and taking it to production.
This document provides an introduction to SOLR, including why search engines are needed, what Lucene and SOLR are, the advantages of SOLR, SOLR architecture, query syntax, working with SOLR to feed and query data, and SOLR installation and configuration. Key topics covered include SOLR's ability to index and search structured and unstructured data in real-time, its sharding and replication capabilities for large datasets, and how SOLR configuration involves defining fields, field types, and dynamic fields in schema.xml.
This document provides an example of using SAX (Simple API for XML) to parse an XML document and print its outline or structure. It defines a PrintHandler class that extends the DefaultHandler and overrides startElement, endElement, and characters methods to print the start and end tags and first word of tag bodies as the document is parsed. The PrintHandler is used along with a SAXParser to parse an XML file and output its outline. This demonstrates a basic use of SAX to parse and process an XML document sequentially through event-based callbacks.
Apache Lucene: Searching the Web and Everything Else (Jazoon07)dnaber
Apache Lucene is a free and open-source search library that provides indexing and searching capabilities. It includes Lucene Java, a core Java library, Solr, a search server with web administration, and Nutch, an open-source web crawler and search engine. Lucene Java provides indexing and searching capabilities, Solr adds web-based administration and HTTP access, and Nutch crawls websites and indexes content.
This document provides an overview of using Apache Lucene and Solr for building a search engine. It outlines the basic search engine pipeline of crawling, parsing, indexing, ranking and searching data. It then introduces Lucene as a free and open source indexing and search library, describing its strengths like speed and flexibility. It provides examples of using the Lucene API for indexing, searching and deleting documents. Finally, it describes Apache Solr as a wrapper for Lucene that provides a REST API and administration interface for building search applications.
This document provides an overview of the search engine capabilities of Apache Solr/Lucene. It begins with an introduction to search engines and their capabilities. It then discusses Apache Lucene as a full-text search library and Apache Solr as an enterprise search platform built on Lucene. Key features of Lucene like indexing, querying, and its architecture are described. The document also explores Solr's features such as caching, SolrCloud, and its architecture. It provides examples of queries in Solr and references for further information.
- The document provides an overview of Apache Solr, an open source enterprise search platform. It discusses how to install and configure Solr, load sample data, and perform various search queries. It also offers tips for advanced search functionality, indexing, and scaling Solr for large datasets.
HOW TO USE APACHE SOLR TO THE FULLEST EFFORTS: A TECHNICAL EXPLORATION OF SEARCH INDEXING
A search tool improves a website's user experience by making it easier and faster for a user to find what they're looking for. Greater emphasis should be placed on huge, e-commerce, and dynamically updated websites (news sites, blogs).
One of the most well-liked search engines utilized by websites of all sizes is Apache Solr. It is a Java-based open-source search engine that enables you to look up information such as articles, goods, customer reviews, and more. In this article, we will examine Apache Solr in more detail.
What makes Apache Solr so well-liked?
Full-text search, hit highlighting, faceted search, real-time indexing, dynamic clustering, database integration, NoSQL features (non-relational database), and rich document handling are all features of Apace Solr Web Development that make it quick and versatile. These features include the ability to index a variety of document formats, including PDF, MS Office, and Open Office, as well as the ability to index new content instantly.
Some useful information regarding Apache Solr
As a search engine for their websites and publications, CNET Networks, Inc. initially created it. Later, it became an Apache top-level project after being open-sourced. Supports a variety of programming languages, including Ruby, PHP, Java, and Python. Additionally, it offers these languages' APIs.
Has integrated capability for geographic search, enabling location-based content searches. Particularly beneficial for websites like tourism and real estate portals. Use APIs and plugins to support sophisticated search capabilities like spell checking, autocomplete, and custom search. Use Lucene for searching and indexing. What is Apache Lucene An open-source Java search library called Lucene makes it simple to incorporate search or information retrieval into an application. It utilizes a robust search algorithm and is adaptable, strong, and accurate.
Although Lucene is best recognized for its full-text search capabilities, it may also be used to classify documents, analyze data, and retrieve information. Along with English, it also supports a wide variety of additional languages, including German, French, Spanish, Chinese, and Japanese.
Describe indexing
Indexing is the first step for all search engines. The conversion of original data into a highly effective cross-reference lookup to speed up search is known as indexing. Data is not directly indexed by search engines. Tokens (atomic components) are first separated out from the texts. Consulting the search index and obtaining the document that matches the query constitute searching.
Benefits of indexing
• Information retrieval that is quick and accurate (collects, parses, and saves)
• The search engine needs extra time to scan each document without indexing.
• indices of flow
• indices of flow
The document will first be examined and divided into tokens.
The document provides instructions for installing Solr on Windows by downloading and configuring Tomcat and Solr. It describes downloading Tomcat and Solr, configuring server.xml, extracting Solr to c:\web\solr, copying the Solr WAR file to Tomcat, and accessing the Solr admin page at http://localhost:8080/solr/admin to verify the installation.
The document provides an introduction to Apache Solr, an open source enterprise search platform. It outlines the objectives of the training, which are to understand the need for enterprise search, how indexing and searching works in Lucene and Solr, Solr features like faceting and highlighting, and job opportunities for Solr developers. The training will cover topics such as Solr architecture, indexing, querying, analysis, and configuration using solrconfig.xml.
This document discusses building distributed search applications using Apache Solr. It provides an overview of Solr architecture and components like schema, indexing, querying etc. It also describes hands-on activities to index sample data from disk, database using Data Import Handler and SolrJ client. Query syntax for different types of queries and configuration of search handlers is also covered.
The document provides information about Apache Solr, an open source search platform written in Java. It discusses how Solr functions, how to install and configure it, options for indexing and querying data, and examples of common Solr operations like search, filtering, faceting and highlighting results.
This document provides an overview and introduction to the Solr search platform. It describes how Solr can be used to index and search content, integrate with other systems, and handle common search issues. The presentation also discusses Lucene, the search library that powers Solr, and how content from various sources like databases, files, and rich documents can be indexed.
Assamese search engine using SOLR by Moinuddin Ahmed ( moin )'Moinuddin Ahmed
Its a search engine i developed for my mother tongue, Assamese. I used Nutch-Lucene-Solr to make this possible. I'm open for comments and suggestions.
Email: moinz.lair@gmail.com
Basics of Solr and Solr Integration with AEM6DEEPAK KHETAWAT
This document provides an introduction and overview of Solr and its integration with AEM. It discusses search statistics to motivate the need for search. It then defines Solr and describes its key features and architecture. It covers topics like indexing, analysis, searching, cores, configurations files and queries. It also discusses setting up Solr with Linux and Windows. Finally, it discusses integrating Solr with AEM, including configuring an embedded Solr server and external Solr integration using a custom replication agent. Exercises are provided to allow hands-on experience with Solr functionality.
Presentation at FOSSETCON 2015
http://www.fossetcon.org/2015/sessions/getting-started-solr-open-source-search-platform-0
Solr is a very popular open source search engine which builds upon the capabilities of Lucene. It's the perfect tool to index loads of text and make it easily searchable. And it's very fast!
Powerful features such as facets, typeahead, and "did you mean" help your users to quickly navigate through a very large dataset and find what they're looking for.
A REST-style JSON interface makes it language-agnostic, you can even work with it straight from the command line using curl!
A flexible plugin mechanism lets you augment your searches with complementary tools such as rich document parsing, text analysis, or your own custom code.
In this session, learn the basics of making your content searchable with Solr.
The document provides an overview of Lucene, an open source search library. It discusses Lucene concepts like indexing, searching, analysis and contributions. The tutorial covers the basics of indexing and searching documents, analyzing text, and popular contributed modules like highlighting, spellchecking and finding similar documents. Attendees will gain hands-on experience with Lucene through code examples and exercises.
This document provides syntax for SQL statements in Oracle Database. It includes syntax for statements such as ALTER CLUSTER, ALTER DATABASE, ALTER DIMENSION, ALTER DISKGROUP, ALTER FUNCTION, and ALTER INDEX, among others. The syntax shows clauses and options that can be used with each statement.
This document summarizes a Solr Recipes Workshop presented by Erik Hatcher of Lucid Imagination. It introduces Lucene and Solr, describes how to index different content sources into Solr including CSV, XML, rich documents, and databases, and provides an overview of using the DataImportHandler to index from a relational database.
All you need to start with Apache Solr (elastic search). This presentation includes all the information of Solr i.e. what it is, installation, indexing & searching for beginners.
The document describes a presentation given at KohaCon12 about adding browse functionality to Koha using Solr. It details the motivation for adding browse, the design of documents in the Solr index, how the index is loaded and synchronized with Koha, and how browse lists and results are queried. The goal is to provide a way to browse alphabetical lists of headings extracted from authority and bibliographic records in Koha.
- Solr is a search engine that indexes document content and provides fast full-text search and faceted search capabilities. It uses Lucene under the hood to index and search documents.
- The document discusses Solr's architecture and capabilities for indexing, searching, and filtering large collections of documents. It also compares Solr to traditional RDBMS systems and how they are meant to complement each other.
- The key aspects of Solr covered include its use of schemas and fields to define document structure, faceting to filter search results, and SolrCloud architecture for distributed searching across multiple servers and shards.
This document provides a summary of the Solr search platform. It begins with introductions from the presenter and about Lucid Imagination. It then discusses what Solr is, how it works, who uses it, and its main features. The rest of the document dives deeper into topics like how Solr is configured, how to index and search data, and how to debug and customize Solr implementations. It promotes downloading and experimenting with Solr to learn more.
1 1/2 years ago we have rolled out a new integrated full-text search engine for our Intranet based on Apache Solr. The search engine integrates various data sources such as file systems, wikis, internal websites and web applications, shared calendars, our corporate database, CRM system, email archive, task management and defect tracking etc. This talk is an experience report about some of the good things, the bad things and the surprising things we have encountered over two years of developing with, operating and using a Intranet search engine based on Apache Solr.
After setting the scene, we will discuss some interesting requirements that we have for our search engine and how we solved them with Apache Solr (or at least tried to solve). Using these concrete examples, we will discuss some interesting features and limitations of Apache Solr.
In the second part of the talk, we will tell a couple of "war stories" and walk through some interesting, annoying and surprising problems that we faced, how we analyzed the issues, identified the cause of the problems and eventually solved them.
The talk is aimed at software developers and architects with some basic knowledge about Apache Solr, the Apache Lucene project familiy or similar full-text search engines. It is not an introduction into Apache Solr and we will dive right into the interesting and juicy bits.
Northern Engraving | Nameplate Manufacturing Process - 2024Northern Engraving
Manufacturing custom quality metal nameplates and badges involves several standard operations. Processes include sheet prep, lithography, screening, coating, punch press and inspection. All decoration is completed in the flat sheet with adhesive and tooling operations following. The possibilities for creating unique durable nameplates are endless. How will you create your brand identity? We can help!
Generating privacy-protected synthetic data using Secludy and MilvusZilliz
During this demo, the founders of Secludy will demonstrate how their system utilizes Milvus to store and manipulate embeddings for generating privacy-protected synthetic data. Their approach not only maintains the confidentiality of the original data but also enhances the utility and scalability of LLMs under privacy constraints. Attendees, including machine learning engineers, data scientists, and data managers, will witness first-hand how Secludy's integration with Milvus empowers organizations to harness the power of LLMs securely and efficiently.
zkStudyClub - LatticeFold: A Lattice-based Folding Scheme and its Application...Alex Pruden
Folding is a recent technique for building efficient recursive SNARKs. Several elegant folding protocols have been proposed, such as Nova, Supernova, Hypernova, Protostar, and others. However, all of them rely on an additively homomorphic commitment scheme based on discrete log, and are therefore not post-quantum secure. In this work we present LatticeFold, the first lattice-based folding protocol based on the Module SIS problem. This folding protocol naturally leads to an efficient recursive lattice-based SNARK and an efficient PCD scheme. LatticeFold supports folding low-degree relations, such as R1CS, as well as high-degree relations, such as CCS. The key challenge is to construct a secure folding protocol that works with the Ajtai commitment scheme. The difficulty, is ensuring that extracted witnesses are low norm through many rounds of folding. We present a novel technique using the sumcheck protocol to ensure that extracted witnesses are always low norm no matter how many rounds of folding are used. Our evaluation of the final proof system suggests that it is as performant as Hypernova, while providing post-quantum security.
Paper Link: https://eprint.iacr.org/2024/257
For the full video of this presentation, please visit: https://www.edge-ai-vision.com/2024/06/how-axelera-ai-uses-digital-compute-in-memory-to-deliver-fast-and-energy-efficient-computer-vision-a-presentation-from-axelera-ai/
Bram Verhoef, Head of Machine Learning at Axelera AI, presents the “How Axelera AI Uses Digital Compute-in-memory to Deliver Fast and Energy-efficient Computer Vision” tutorial at the May 2024 Embedded Vision Summit.
As artificial intelligence inference transitions from cloud environments to edge locations, computer vision applications achieve heightened responsiveness, reliability and privacy. This migration, however, introduces the challenge of operating within the stringent confines of resource constraints typical at the edge, including small form factors, low energy budgets and diminished memory and computational capacities. Axelera AI addresses these challenges through an innovative approach of performing digital computations within memory itself. This technique facilitates the realization of high-performance, energy-efficient and cost-effective computer vision capabilities at the thin and thick edge, extending the frontier of what is achievable with current technologies.
In this presentation, Verhoef unveils his company’s pioneering chip technology and demonstrates its capacity to deliver exceptional frames-per-second performance across a range of standard computer vision networks typical of applications in security, surveillance and the industrial sector. This shows that advanced computer vision can be accessible and efficient, even at the very edge of our technological ecosystem.
Conversational agents, or chatbots, are increasingly used to access all sorts of services using natural language. While open-domain chatbots - like ChatGPT - can converse on any topic, task-oriented chatbots - the focus of this paper - are designed for specific tasks, like booking a flight, obtaining customer support, or setting an appointment. Like any other software, task-oriented chatbots need to be properly tested, usually by defining and executing test scenarios (i.e., sequences of user-chatbot interactions). However, there is currently a lack of methods to quantify the completeness and strength of such test scenarios, which can lead to low-quality tests, and hence to buggy chatbots.
To fill this gap, we propose adapting mutation testing (MuT) for task-oriented chatbots. To this end, we introduce a set of mutation operators that emulate faults in chatbot designs, an architecture that enables MuT on chatbots built using heterogeneous technologies, and a practical realisation as an Eclipse plugin. Moreover, we evaluate the applicability, effectiveness and efficiency of our approach on open-source chatbots, with promising results.
"Frontline Battles with DDoS: Best practices and Lessons Learned", Igor IvaniukFwdays
At this talk we will discuss DDoS protection tools and best practices, discuss network architectures and what AWS has to offer. Also, we will look into one of the largest DDoS attacks on Ukrainian infrastructure that happened in February 2022. We'll see, what techniques helped to keep the web resources available for Ukrainians and how AWS improved DDoS protection for all customers based on Ukraine experience
HCL Notes und Domino Lizenzkostenreduzierung in der Welt von DLAUpanagenda
Webinar Recording: https://www.panagenda.com/webinars/hcl-notes-und-domino-lizenzkostenreduzierung-in-der-welt-von-dlau/
DLAU und die Lizenzen nach dem CCB- und CCX-Modell sind für viele in der HCL-Community seit letztem Jahr ein heißes Thema. Als Notes- oder Domino-Kunde haben Sie vielleicht mit unerwartet hohen Benutzerzahlen und Lizenzgebühren zu kämpfen. Sie fragen sich vielleicht, wie diese neue Art der Lizenzierung funktioniert und welchen Nutzen sie Ihnen bringt. Vor allem wollen Sie sicherlich Ihr Budget einhalten und Kosten sparen, wo immer möglich. Das verstehen wir und wir möchten Ihnen dabei helfen!
Wir erklären Ihnen, wie Sie häufige Konfigurationsprobleme lösen können, die dazu führen können, dass mehr Benutzer gezählt werden als nötig, und wie Sie überflüssige oder ungenutzte Konten identifizieren und entfernen können, um Geld zu sparen. Es gibt auch einige Ansätze, die zu unnötigen Ausgaben führen können, z. B. wenn ein Personendokument anstelle eines Mail-Ins für geteilte Mailboxen verwendet wird. Wir zeigen Ihnen solche Fälle und deren Lösungen. Und natürlich erklären wir Ihnen das neue Lizenzmodell.
Nehmen Sie an diesem Webinar teil, bei dem HCL-Ambassador Marc Thomas und Gastredner Franz Walder Ihnen diese neue Welt näherbringen. Es vermittelt Ihnen die Tools und das Know-how, um den Überblick zu bewahren. Sie werden in der Lage sein, Ihre Kosten durch eine optimierte Domino-Konfiguration zu reduzieren und auch in Zukunft gering zu halten.
Diese Themen werden behandelt
- Reduzierung der Lizenzkosten durch Auffinden und Beheben von Fehlkonfigurationen und überflüssigen Konten
- Wie funktionieren CCB- und CCX-Lizenzen wirklich?
- Verstehen des DLAU-Tools und wie man es am besten nutzt
- Tipps für häufige Problembereiche, wie z. B. Team-Postfächer, Funktions-/Testbenutzer usw.
- Praxisbeispiele und Best Practices zum sofortigen Umsetzen
Connector Corner: Seamlessly power UiPath Apps, GenAI with prebuilt connectorsDianaGray10
Join us to learn how UiPath Apps can directly and easily interact with prebuilt connectors via Integration Service--including Salesforce, ServiceNow, Open GenAI, and more.
The best part is you can achieve this without building a custom workflow! Say goodbye to the hassle of using separate automations to call APIs. By seamlessly integrating within App Studio, you can now easily streamline your workflow, while gaining direct access to our Connector Catalog of popular applications.
We’ll discuss and demo the benefits of UiPath Apps and connectors including:
Creating a compelling user experience for any software, without the limitations of APIs.
Accelerating the app creation process, saving time and effort
Enjoying high-performance CRUD (create, read, update, delete) operations, for
seamless data management.
Speakers:
Russell Alfeche, Technology Leader, RPA at qBotic and UiPath MVP
Charlie Greenberg, host
In the realm of cybersecurity, offensive security practices act as a critical shield. By simulating real-world attacks in a controlled environment, these techniques expose vulnerabilities before malicious actors can exploit them. This proactive approach allows manufacturers to identify and fix weaknesses, significantly enhancing system security.
This presentation delves into the development of a system designed to mimic Galileo's Open Service signal using software-defined radio (SDR) technology. We'll begin with a foundational overview of both Global Navigation Satellite Systems (GNSS) and the intricacies of digital signal processing.
The presentation culminates in a live demonstration. We'll showcase the manipulation of Galileo's Open Service pilot signal, simulating an attack on various software and hardware systems. This practical demonstration serves to highlight the potential consequences of unaddressed vulnerabilities, emphasizing the importance of offensive security practices in safeguarding critical infrastructure.
AppSec PNW: Android and iOS Application Security with MobSFAjin Abraham
Mobile Security Framework - MobSF is a free and open source automated mobile application security testing environment designed to help security engineers, researchers, developers, and penetration testers to identify security vulnerabilities, malicious behaviours and privacy concerns in mobile applications using static and dynamic analysis. It supports all the popular mobile application binaries and source code formats built for Android and iOS devices. In addition to automated security assessment, it also offers an interactive testing environment to build and execute scenario based test/fuzz cases against the application.
This talk covers:
Using MobSF for static analysis of mobile applications.
Interactive dynamic security assessment of Android and iOS applications.
Solving Mobile app CTF challenges.
Reverse engineering and runtime analysis of Mobile malware.
How to shift left and integrate MobSF/mobsfscan SAST and DAST in your build pipeline.
5th LF Energy Power Grid Model Meet-up SlidesDanBrown980551
5th Power Grid Model Meet-up
It is with great pleasure that we extend to you an invitation to the 5th Power Grid Model Meet-up, scheduled for 6th June 2024. This event will adopt a hybrid format, allowing participants to join us either through an online Mircosoft Teams session or in person at TU/e located at Den Dolech 2, Eindhoven, Netherlands. The meet-up will be hosted by Eindhoven University of Technology (TU/e), a research university specializing in engineering science & technology.
Power Grid Model
The global energy transition is placing new and unprecedented demands on Distribution System Operators (DSOs). Alongside upgrades to grid capacity, processes such as digitization, capacity optimization, and congestion management are becoming vital for delivering reliable services.
Power Grid Model is an open source project from Linux Foundation Energy and provides a calculation engine that is increasingly essential for DSOs. It offers a standards-based foundation enabling real-time power systems analysis, simulations of electrical power grids, and sophisticated what-if analysis. In addition, it enables in-depth studies and analysis of the electrical power grid’s behavior and performance. This comprehensive model incorporates essential factors such as power generation capacity, electrical losses, voltage levels, power flows, and system stability.
Power Grid Model is currently being applied in a wide variety of use cases, including grid planning, expansion, reliability, and congestion studies. It can also help in analyzing the impact of renewable energy integration, assessing the effects of disturbances or faults, and developing strategies for grid control and optimization.
What to expect
For the upcoming meetup we are organizing, we have an exciting lineup of activities planned:
-Insightful presentations covering two practical applications of the Power Grid Model.
-An update on the latest advancements in Power Grid -Model technology during the first and second quarters of 2024.
-An interactive brainstorming session to discuss and propose new feature requests.
-An opportunity to connect with fellow Power Grid Model enthusiasts and users.
"Choosing proper type of scaling", Olena SyrotaFwdays
Imagine an IoT processing system that is already quite mature and production-ready and for which client coverage is growing and scaling and performance aspects are life and death questions. The system has Redis, MongoDB, and stream processing based on ksqldb. In this talk, firstly, we will analyze scaling approaches and then select the proper ones for our system.
Driving Business Innovation: Latest Generative AI Advancements & Success StorySafe Software
Are you ready to revolutionize how you handle data? Join us for a webinar where we’ll bring you up to speed with the latest advancements in Generative AI technology and discover how leveraging FME with tools from giants like Google Gemini, Amazon, and Microsoft OpenAI can supercharge your workflow efficiency.
During the hour, we’ll take you through:
Guest Speaker Segment with Hannah Barrington: Dive into the world of dynamic real estate marketing with Hannah, the Marketing Manager at Workspace Group. Hear firsthand how their team generates engaging descriptions for thousands of office units by integrating diverse data sources—from PDF floorplans to web pages—using FME transformers, like OpenAIVisionConnector and AnthropicVisionConnector. This use case will show you how GenAI can streamline content creation for marketing across the board.
Ollama Use Case: Learn how Scenario Specialist Dmitri Bagh has utilized Ollama within FME to input data, create custom models, and enhance security protocols. This segment will include demos to illustrate the full capabilities of FME in AI-driven processes.
Custom AI Models: Discover how to leverage FME to build personalized AI models using your data. Whether it’s populating a model with local data for added security or integrating public AI tools, find out how FME facilitates a versatile and secure approach to AI.
We’ll wrap up with a live Q&A session where you can engage with our experts on your specific use cases, and learn more about optimizing your data workflows with AI.
This webinar is ideal for professionals seeking to harness the power of AI within their data management systems while ensuring high levels of customization and security. Whether you're a novice or an expert, gain actionable insights and strategies to elevate your data processes. Join us to see how FME and AI can revolutionize how you work with data!
Main news related to the CCS TSI 2023 (2023/1695)Jakub Marek
An English 🇬🇧 translation of a presentation to the speech I gave about the main changes brought by CCS TSI 2023 at the biggest Czech conference on Communications and signalling systems on Railways, which was held in Clarion Hotel Olomouc from 7th to 9th November 2023 (konferenceszt.cz). Attended by around 500 participants and 200 on-line followers.
The original Czech 🇨🇿 version of the presentation can be found here: https://www.slideshare.net/slideshow/hlavni-novinky-souvisejici-s-ccs-tsi-2023-2023-1695/269688092 .
The videorecording (in Czech) from the presentation is available here: https://youtu.be/WzjJWm4IyPk?si=SImb06tuXGb30BEH .
Taking AI to the Next Level in Manufacturing.pdfssuserfac0301
Read Taking AI to the Next Level in Manufacturing to gain insights on AI adoption in the manufacturing industry, such as:
1. How quickly AI is being implemented in manufacturing.
2. Which barriers stand in the way of AI adoption.
3. How data quality and governance form the backbone of AI.
4. Organizational processes and structures that may inhibit effective AI adoption.
6. Ideas and approaches to help build your organization's AI strategy.
Skybuffer SAM4U tool for SAP license adoptionTatiana Kojar
Manage and optimize your license adoption and consumption with SAM4U, an SAP free customer software asset management tool.
SAM4U, an SAP complimentary software asset management tool for customers, delivers a detailed and well-structured overview of license inventory and usage with a user-friendly interface. We offer a hosted, cost-effective, and performance-optimized SAM4U setup in the Skybuffer Cloud environment. You retain ownership of the system and data, while we manage the ABAP 7.58 infrastructure, ensuring fixed Total Cost of Ownership (TCO) and exceptional services through the SAP Fiori interface.
Ivanti’s Patch Tuesday breakdown goes beyond patching your applications and brings you the intelligence and guidance needed to prioritize where to focus your attention first. Catch early analysis on our Ivanti blog, then join industry expert Chris Goettl for the Patch Tuesday Webinar Event. There we’ll do a deep dive into each of the bulletins and give guidance on the risks associated with the newly-identified vulnerabilities.
2. Contents
Requirements................................................................................................................................................3
Solution - Solr................................................................................................................................................3
Features ....................................................................................................................................................3
Typical Solr Setup Diagram .......................................................................................................................4
Basic Solr Concepts ...................................................................................................................................4
1. Indexing.............................................................................................................................................4
2. How Solr represents data..................................................................................................................5
Installing Solr.............................................................................................................................................7
Starting Solr...............................................................................................................................................7
Indexing Data............................................................................................................................................7
Searching...................................................................................................................................................8
Faceting.................................................................................................................................................9
Highlighting.........................................................................................................................................10
Spell Checking .....................................................................................................................................10
Relevance............................................................................................................................................10
Shutdown................................................................................................................................................10
Screen Shots............................................................................................................................................11
Apache SolrCloud........................................................................................................................................15
Features ..................................................................................................................................................15
Simple two shard cluster.........................................................................................................................15
Dealing with high volume of data...........................................................................................................18
Dealing with failure.................................................................................................................................19
Synchronization of data (added/updated in DB) with Solr.....................................................................20
Limitations ..............................................................................................................................................20
Screen Shots............................................................................................................................................21
Integration with .Net using SolrNet........................................................................................................23
3. Requirements
a. Fast and full text search capabilities
b. Optimization of huge data on web traffic
c. Highly and linearly scalable on demand
d. Plug with any platform
e. Near real time search and indexing
f. Flexible and Adaptable with XML,JSON,CSV configuration
Solution - Solr
Solr is a standalone enterprise search server with a REST-like API. You put documents in it
(called "indexing") via XML, JSON, CSV or binary over HTTP. You query it via HTTP GET and
receive XML, JSON, CSV or binary results.
Features
Advanced Full-Text Search Capabilities
Optimized for High Volume Web Traffic
Standards Based Open Interfaces - XML, JSON and HTTP
Comprehensive HTML Administration Interfaces
Linearly scalable, auto index replication, auto failover and recovery
Near Real-time indexing
Flexible and Adaptable with XML configuration
Extensible Plugin Architecture
Easily manage multilingual support
4. Typical Solr Setup Diagram
Figure 1 Typical Solr Setup Diagram
Basic Solr Concepts
In this document, we'll cover the basics of what you need to know about Solr in order to use it.
1. Indexing
Solr is able to achieve fast search responses because, instead of searching the text directly, it
searches an index instead.
This is like retrieving pages in a book related to a keyword by scanning the index at the back of
a book, as opposed to searching every word of every page of the book.
This type of index is called an inverted index, because it inverts a page-centric data structure
(page->words) to a keyword-centric data structure (word->pages).
Solr stores this index in a directory called index in the data directory.
5. 2. How Solr represents data
In Solr, a Document is the unit of search and index.
An index consists of one or more Documents, and a Document consists of one or more Fields.
Schema
Before adding documents to Solr, you need to specify the schema, represented in a file
called schema.xml. It is not advisable to change the schema after documents have been added
to the index.
The schema declares:
o what kinds of fields there are
o which field should be used as the unique/primary key
o which fields are required
o how to index and search each field
Field Types
In Solr, every field has a type.
Examples of basic field types available in Solr include:
o float
o long
o double
o date
o text
Defining a field
Here's what a field declaration looks like:
<field name="id" type="text" indexed="true" stored="true"multiValued="true"/>
o name: Name of the field
o type: Field type
o indexed: this field be added to the inverted index
6. o stored: the original value of this field be stored
o multivalued: this field have multiple values
The indexed and stored attributes are important.
Analysis
When data is added to Solr, it goes through a series of transformations before being added to
the index. This is called the analysis phase. Examples of transformations include lower-casing,
removing word stems etc. The end result of the analysis is a series of tokens which are then
added to the index. Tokens, not the original text, are what are searched when you perform a
search query.
Indexed fields are fields which undergo an analysis phase, and are added to the index.
Term Storage
When we displaying search results to users, they generally expect to see the original document,
not the machine-processed token.
That's the purpose of the stored attribute to tell Solr to store the original text in the index
somewhere.
Sometimes, there are fields which aren't searched, but need to display in the search results.
You accomplish that by setting the field attributes to stored=true and indexed=false.
So, why wouldn't you store all the fields all the time?
Because storing fields increases the size of the index, and the larger the index, the slower the
search. In terms of physical computing, we'd say that a larger index requires more disk seeks to
get to the same amount of data.
7. Installing Solr
You should also have JDK 5 or above installed.
Begin by unziping the Solr release and changing your working directory to be the "example"
directory.
unzip –q apache-solr-4.1.0.zip
cd apache-solr-4.1.0/example/
Starting Solr
Solr comes with an example directory which contains some sample files we can use.
We start this example server with java -jar start.jar.
cd example
java -jar start.jar
You should see something like this in the terminal.
2011-10-02 05:20:27.120:INFO::Logging to STDERR via org.mortbay.log.StdErrLog
2011-10-02 05:20:27.212:INFO::jetty-6.1-SNAPSHOT
....
2011-10-02 05:18:27.645:INFO::Started SocketConnector@0.0.0.0:8983
Solr is now running! You can now access the Solr Admin webapp by loading
http://localhost:8983/solr/admin/ in your web browser.
Indexing Data
We're now going to add some sample data to our Solr instance.
The exampledocs folder contains some XML files we can posting them from the command line
cd exampledocs
java -jar post.jar solr.xml monitor.xml
8. That produces:
SimplePostTool: POSTing files to http://localhost:8983/solr/update.
SimplePostTool: POSTing file solr.xml
SimplePostTool: POSTing file monitor.xml
SimplePostTool: COMMITting Solr index changes.
This response tells us that the POST operation was successful.
You can also index all of the sample data, using the following command (assuming your
command line shell supports the *.xml notation):
cd exampledocs
java -jar post.jar *.xml
Searching
Let's see if we can retrieve the document we just added below URL on browser.
Since Solr accepts HTTP requests, you can use your web browser to communicate with
Solr: http://localhost:8983/solr/select?q=*:*&wt=json
This returns the following JSON result:
{
"responseHeader": {
"status": 0,
"QTime": 0,
"params": {
"wt": "json",
"q": "*:*"
}
},
"response": {
9. "numFound": 1,
"start": 0,
"docs": [
{
"id": "3007WFP",
"name": "Dell Widescreen UltraSharp 3007WFP",
"manu": "Dell, Inc.",
"includes": "USB cable",
"weight": 401.6,
"price": 2199,
"popularity": 6,
"inStock": true,
"store": "43.17614,-90.57341",
"cat": [
"electronics",
"monitor"
],
"features": [
"30" TFT active matrix LCD, 2560 x 1600, .25mm dot pitch, 700:1 contrast"
]
}
]
}
}
Faceting
Faceting is the arrangement of search results into categories based on indexed terms. Searchers
are presented with the indexed terms along with numerical counts of how many matching
documents were found were each term. Faceting makes it easy for users to explore search
results, narrowing in on exactly the results they are looking for.
10. Highlighting
Highlighting in Solr allows fragments of documents that match the user's query to be included
with the query response. The fragments are included in a special section of the response
(the highlighting section), and the client uses the formatting clues also included to determine
how to present the snippets to users.
Spell Checking
The Spellcheck component is designed to provide inline query suggestions based on other,
similar, terms.
Relevance
Relevance is the degree to which a query response satisfies a user who is searching for
information.
The relevance of a query response depends on the context in which the query was performed.
A single search application may be used in different contexts by users with different needs and
expectations. For example, a search engine of climate data might be used by a university
researcher studying long-term climate trends, a farmer interested in calculating the likely date
of the last frost of spring, a civil engineer interested in rainfall patterns and the frequency of
floods, and a college student planning a vacation to a region and wondering what to pack.
Because the motivations of these users vary, the relevance of any particular response to a
query will vary as well.
Shutdown
To shut down Solr, from the terminal where you launched Solr, hit Ctrl+C. This will shut down
Solr cleanly.
Link: http://lucene.apache.org/solr/3_6_2/doc-files/tutorial.html
http://www.solrtutorial.com/
https://cwiki.apache.org/confluence/display/solr/
15. Apache SolrCloud
SolrCloud is the name of a set of new distributed capabilities in Solr. Passing parameters to
enable these capabilities will enable you to set up a highly available, fault tolerant cluster of
Solr servers. Use SolrCloud when you want high scale, fault tolerant, distributed indexing and
search capabilities.
Solr embeds and uses Zookeeper as a repository for cluster configuration and coordination -
think of it as a distributed filesystem that contains information about all of the Solr servers.
Note: reset all configurations and remove documents from the tutorial before going through
the cloud features.
Features
Centralized Apache ZooKeeper based configuration
Automated distributed indexing/sharding - send documents to any node and it will be
forwarded to correct shard
Near Real-Time indexing
Transaction log ensures no updates are lost even if the documents are not yet indexed to
disk
Automated query failover, index leader election and recovery in case of failure
No single point of failure
Simple two shard cluster
Figure 10 Simple Two Shard Cluster Image
16. This example simply creates a cluster consisting of two solr servers representing two different
shards of a collection.
Since we'll need two solr servers for this example, simply make a copy of the example directory
for the second server -- making sure you don't have any data already indexed.
rm -r example/solr/collection1/data/*
cp -r example example2
This command starts up a Solr server and bootstraps a new solr cluster.
cd example
java -Dbootstrap_confdir=./solr/collection1/conf -Dcollection.configName=myconf -DzkRun -
DnumShards=2 -jar start.jar
-DzkRun causes an embedded zookeeper server to be run as part of this Solr server.
-Dbootstrap_confdir=./solr/collection1/conf, this parameter causes the local
configuration directory ./solr/conf to be uploaded as the "myconf" config. The name
"myconf" is taken from the "collection.configName" param below.
-Dcollection.configName=myconf sets the config to use for the new collection.
-DnumShards=2 the number of logical partitions we plan on splitting the index into.
Browse to http://localhost:8983/solr/#/~cloud to see the state of the cluster (the zookeeper
distributed filesystem).
You can see from the zookeeper browser that the Solr configuration files were uploaded under
"myconf", and that a new document collection called "collection1" was created. Under
collection1 is a list of shards, the pieces that make up the complete collection.
Now we want to start up our second server - it will automatically be assigned to shard2 because
we don't explicitly set the shard id.
Then start the second server, pointing it at the cluster:
cd example2
java -Djetty.port=7574 -DzkHost=localhost:9983 -jar start.jar
-Djetty.port=7574 is just one way to tell the Jetty servlet container to use a different
port.
17. -DzkHost=localhost: 9983 points to the Zookeeper ensemble containing the cluster
state. In this example we're running a single Zookeeper server embedded in the first Solr
server. By default, an embedded Zookeeper server runs at the Solr port plus 1000, so
9983.
If you refresh the zookeeper browser, you should now see both shard1 and shard2 in
collection1. View http://localhost:8983/solr/#/~cloud.
Next, index some documents.
cd exampledocs
java -Durl=http://localhost:7574/solr/collection1/update -jar post.jar ipod_video.xml
java -Durl=http://localhost:8983/solr/collection1/update -jar post.jar monitor.xml
java -Durl=http://localhost:7574/solr/collection1/update -jar post.jar mem.xml
And now, a request to either server results in a distributed search that covers the entire
collection:
http://localhost:8983/solr/collection1/select?q=*:*
If at any point you wish to start over fresh or experiment with different configurations, you can
delete all of the cloud state contained within zookeeper by simply deleting the solr/zoo_data
directory after shutting down the servers.
18. Dealing with high volume of data
Solution: If the data volume goes high then creating more shards or splitting shard with
physical memory and storage in existing cluster cloud environment.
Figure 11 Creating Shard and Replica when volume goes high
Link: http://www.hathitrust.org/blogs/large-scale-search/scaling-large-scale-search-from-
500000-volumes-5-million-volumes-and-beyond
19. Dealing with failure
Solution:
a. Failure of zookeeper: To avoid failure keeping zookeeper in two separate server so
if one goes down then other can work because zookeeper has maintain all the
cluster state and configuration information .
b. Failure of Solr shard: We can create the replica of each shard so if one shard goes
down then replica can do our job.
Figure 12 Diagram which handling failure scenario
Link:
https://wiki.apache.org/solr/SolrCloud#Example_C:_Two_shard_cluster_with_shard_replicas_a
nd_zookeeper_ensemble
20. Synchronization of data (added/updated in DB) with Solr
Solution:
a. We can create the cron job which can fetch data from database and updating
index in Solr.
b. Another option is that as and when data is added/update in frontend, after
inserting/updating data in database from business layer, we can add piece of code
which can add/update data using update Solr APIs (as we have integration with
.net we can use SolrNet library which provides such addition/updation APIs).
Link: http://wiki.apache.org/solr/DataImportHandler#Scheduling
http://stackoverflow.com/questions/6463844/how-to-index-data-in-solr-from-database-
automatically
Limitations
1. No more than 50 to 100 million documents per node.
2. No more than 250 fields per document.
3. No more than 250K characters per document.
4. No more than 25 faceted fields.
5. No more than 32 nodes in your SolrCloud cluster.
6. Don't return more than 250 results on a query.
A major driving factor for Solr performance is RAM. Solr requires sufficient memory for two
separate things: One is the Java heap, the other is "free" memory for the OS disk cache.
It is strongly recommended that Solr runs on a 64-bit Java. A 64-bit Java requires a 64-bit
operating system, and a 64-bit operating system requires a 64-bit CPU. There's nothing wrong
with 32-bit software or hardware, but a 32-bit Java is limited to a 2GB heap, which can result in
artificial limitations that don't exist with a larger heap.
Link: http://lucene.472066.n3.nabble.com/Solr-limitations-td4076250.html
https://wiki.apache.org/solr/SolrPerformanceProblems
21. Screen Shots
Figure 13 Solr Admin UI-Cloud Screen
Figure 14 Solr Admin UI-Zookeeper maintains Cluster State Information that is shown in Tree Screen
23. Integration with .Net using SolrNet
Solr exposes REST apis which can be used for interacting with Solr, however it needs serialization in
converting documents retuned as search result to fill in actual object container. Solrnet is .Net library for
interacting with Solr. It provides convenient and easy apis to search, add, update data in Solr. Further
information on SolrNet is available at https://github.com/mausch/SolrNet
Figure 17 Integration with .Net