The document discusses using MapReduce to process spatial data. It presents two MapReduce algorithms: one for bulk construction of R-tree indexes on vector data and one for computing image quality metrics on raster aerial imagery data. Experimental results show that the MapReduce R-tree construction algorithm outperforms a single process approach and scales well as more reducers are used. The image quality computation algorithm efficiently processes large aerial image datasets in parallel.
The document provides an overview of Hadoop, describing it as an open-source software framework for distributed storage and processing of large datasets across clusters of computers. It discusses key Hadoop components like HDFS for storage, MapReduce for distributed processing, and YARN for resource management. The document also gives examples of how organizations are using Hadoop at large scale for applications like search indexing and data analytics.
Processing massive amount of data with Map Reduce using Apache Hadoop - Indi...IndicThreads
This document provides an overview of MapReduce and Hadoop. It describes the Map and Reduce functions, explaining that Map applies a function to each element of a list and Reduce reduces a list to a single value. It gives examples of Map and Reduce using employee salary data. It then discusses Hadoop and its core components HDFS for distributed storage and MapReduce for distributed processing. Key aspects covered include the NameNode, DataNodes, input/output formats, and the job launch process. It also addresses some common questions around small files, large files, and accessing SQL data from Hadoop.
Hadoop is an open-source framework for distributed processing of large datasets across clusters of computers. It allows for the parallel processing of large datasets stored across multiple servers. Hadoop uses HDFS for reliable storage and MapReduce as a programming model for distributed computing. HDFS stores data reliably in blocks across nodes, while MapReduce processes data in parallel using map and reduce functions.
Integrating R & Hadoop - Text Mining & Sentiment AnalysisAravind Babu
The document discusses integrating R and Hadoop for big data analytics. It notes that existing statistical applications like R are incapable of handling big data, while data management tools lack analytical capabilities. Integrating R with Hadoop bridges this gap by leveraging R's analytics and statistics functionality with Hadoop's ability to process and store distributed data. RHadoop is introduced as an open source project that allows R programmers to directly use MapReduce functionality in R code. Specific RHadoop packages like rhdfs and rmr2 are described that enable interacting with HDFS and performing statistical analysis via MapReduce on Hadoop clusters. Text analytics use cases with R and Hadoop like sentiment analysis are also briefly outlined.
Some slides about the Map/Reduce programming model (academic purposes) adapting some examples of the book Map/Reduce design patterns.
Special thanks to the next authors:
-http://shop.oreilly.com/product/0636920025122.do
-http://mapreducepatterns.com/index.php?title=Main_Page
-http://highlyscalable.wordpress.com/2012/02/01/mapreduce-patterns/
This document provides a marking scheme for a computing exam with a maximum mark of 90. It summarizes the key points assessors should look for in student responses to various questions about computing topics like operating systems, real-time vs online systems, networks, programming errors, data structures, computer hardware, data transmission, security, database design, and information systems. The marking scheme breaks down the essential information needed for each question and awards marks for students including these details in their answers.
The document outlines the anatomy of MapReduce applications including common phases like input splitting, mapping, shuffling, and reducing. It then provides high-level and low-level views of how a word counting MapReduce job works, explaining that it takes a text corpus as input, maps words to counts of 1, shuffles to reduce by word, and outputs final word counts. The map and reduce functions are explained at a high-level, and then implementation details like MapRunner, RecordReader, and OutputCollector are described at a lower level.
The document provides an overview of Hadoop, describing it as an open-source software framework for distributed storage and processing of large datasets across clusters of computers. It discusses key Hadoop components like HDFS for storage, MapReduce for distributed processing, and YARN for resource management. The document also gives examples of how organizations are using Hadoop at large scale for applications like search indexing and data analytics.
Processing massive amount of data with Map Reduce using Apache Hadoop - Indi...IndicThreads
This document provides an overview of MapReduce and Hadoop. It describes the Map and Reduce functions, explaining that Map applies a function to each element of a list and Reduce reduces a list to a single value. It gives examples of Map and Reduce using employee salary data. It then discusses Hadoop and its core components HDFS for distributed storage and MapReduce for distributed processing. Key aspects covered include the NameNode, DataNodes, input/output formats, and the job launch process. It also addresses some common questions around small files, large files, and accessing SQL data from Hadoop.
Hadoop is an open-source framework for distributed processing of large datasets across clusters of computers. It allows for the parallel processing of large datasets stored across multiple servers. Hadoop uses HDFS for reliable storage and MapReduce as a programming model for distributed computing. HDFS stores data reliably in blocks across nodes, while MapReduce processes data in parallel using map and reduce functions.
Integrating R & Hadoop - Text Mining & Sentiment AnalysisAravind Babu
The document discusses integrating R and Hadoop for big data analytics. It notes that existing statistical applications like R are incapable of handling big data, while data management tools lack analytical capabilities. Integrating R with Hadoop bridges this gap by leveraging R's analytics and statistics functionality with Hadoop's ability to process and store distributed data. RHadoop is introduced as an open source project that allows R programmers to directly use MapReduce functionality in R code. Specific RHadoop packages like rhdfs and rmr2 are described that enable interacting with HDFS and performing statistical analysis via MapReduce on Hadoop clusters. Text analytics use cases with R and Hadoop like sentiment analysis are also briefly outlined.
Some slides about the Map/Reduce programming model (academic purposes) adapting some examples of the book Map/Reduce design patterns.
Special thanks to the next authors:
-http://shop.oreilly.com/product/0636920025122.do
-http://mapreducepatterns.com/index.php?title=Main_Page
-http://highlyscalable.wordpress.com/2012/02/01/mapreduce-patterns/
This document provides a marking scheme for a computing exam with a maximum mark of 90. It summarizes the key points assessors should look for in student responses to various questions about computing topics like operating systems, real-time vs online systems, networks, programming errors, data structures, computer hardware, data transmission, security, database design, and information systems. The marking scheme breaks down the essential information needed for each question and awards marks for students including these details in their answers.
The document outlines the anatomy of MapReduce applications including common phases like input splitting, mapping, shuffling, and reducing. It then provides high-level and low-level views of how a word counting MapReduce job works, explaining that it takes a text corpus as input, maps words to counts of 1, shuffles to reduce by word, and outputs final word counts. The map and reduce functions are explained at a high-level, and then implementation details like MapRunner, RecordReader, and OutputCollector are described at a lower level.
This page provides access to information about how to integrate Apache Hadoop with Lustre. We have made several enhancements to improve the use of Hadoop with Lustre and have conducted performance tests to compare the performance of Lustre vs. HDFS when used with Hadoop.
http://wiki.lustre.org/index.php/Integrating_Hadoop_with_Lustre
RHive aims to integrate R and Hive by allowing analysts to use R's familiar environment while leveraging Hive's capabilities for big data analysis. RHive allows R functions and objects to be used in Hive queries through RUDFs and RUDAFs. It also provides functions like napply to analyze big data in HDFS using R in a distributed manner. RHive provides a bridge between the two environments without requiring users to learn MapReduce programming.
This document summarizes Mark Levy's presentation on using Hadoop for algorithms on user data at Last.fm. It describes how Last.fm uses Hadoop to compute music charts from over 1 billion user scrobbles per month and calculate royalties. It also discusses using Hadoop for topic modeling of user profiles and documents through LDA, graph recommendations through label propagation on the user-item graph, and processing audio files to extract metadata through a map-reduce approach.
Hadoop, being a disruptive data processing framework, has made a large impact in the data ecosystems of today. Enabling business users to translate existing skills to Hadoop is necessary to encourage the adoption and allow businesses to get value out of their Hadoop investment quickly. R, being a prolific and rapidly growing data analysis language, now has a place in the Hadoop ecosystem. With the advent of technologies such as RHadoop, optimizing R workloads for use on Hadoop has become much easier. This session will help you understand how RHadoop projects such as RMR, and RHDFS work with Hadoop, and will show you examples of using these technologies on the Hortonworks Data Platform.
This document provides an introduction to coalesced hashing, a technique for storing and retrieving records from a database. Coalesced hashing stores records in two areas: an address region and a cellar. It is sensitive to the relative sizes of these areas, represented by an address factor. The document analyzes how to optimize this factor to minimize search time. It finds the compromise address factor of 0.86 works well. Coalesced hashing with this optimized factor outperforms other methods like separate chaining and linear probing.
The document is a past exam paper for an Advanced Data Structures course. It contains 8 questions related to various data structures and algorithms topics. Students are instructed to answer any 5 of the 8 questions, which are worth 16 marks each. The questions cover topics such as templates, exception handling, linked lists, hash tables, binary search trees, and string matching algorithms.
Speaking of big data analysis, what comes to mind is possibly using HDFS and MapReduce within Hadoop. But to write a MapReduce program, one must face the problem of learning how to write native java. One might wonder is it possible to use R, the most popular language adapted by data scientist, to implement MapReduce program? And through the integration or R and Hadoop, is it truly one can unleash the power of parallel computing and big data analysis?
This slide introduces how to install RHadoop step by step, and introduces how to write a MapReduce program through R. What is more, this slide will discuss whether RHadoop is really a light for big data analysis, or just another method to write MapReduce Program.
Please mail me if you found any problem toward the slide. EMAIL: tr.ywchiu@gmail.com
談到巨量資料,通常大家腦海中聯想到的就是使用Hadoop 的 MapReduce 和HDFS,但是撰寫MapReduce,則就必須要學會撰寫Java 或透過Thrift 接口才能撰寫。但R是否有辦法運行在Hadoop 上呢 ? 而使用R + Hadoop,是否就真的能結合R強大的分析功能,分析巨量資料呢 ?
本次講題將介紹如何Step by step 在Hadoop 上安裝RHadoop相關套件,並介紹如何撰寫R的MapReduce 程式。更重要的是,此次將探討使用RHadoop 是否為巨量資料分析找到一盞明燈? 或者只是另一套實作方法而已?
Hadoop World 2011: The Powerful Marriage of R and Hadoop - David Champagne, R...Cloudera, Inc.
When two of the most powerful innovations in modern analytics come together, the result is revolutionary. This session will provide an overview of R, the Open Source programming language used by more than 2 million users that was specifically developed for statistical analysis and data visualization. It will discuss the ways that R and Hadoop have been integrated and look at use case that provides real-world experience. Finally it will provide suggestions of how enterprises can take advantage of both of these industry-leading technologies.
The document discusses using MapReduce to efficiently calculate pairwise document similarity in large document collections. It describes building an inverted index that maps each term to the documents that contain it and associated term weights. This index is generated by mappers emitting term keys and (document, weight) value tuples, which reducers write to disk. Pairwise similarity is then calculated by mappers generating key tuples for all document pairs from a term's postings, with values of the product of weights, representing individual term contributions. Reducers sum these contributions to generate the final similarity score for each pair.
Hw09 Production Deep Dive With High AvailabilityCloudera, Inc.
ContextWeb is an online advertisement company that processes large volumes of log data using Hadoop. They process up to 120GB of raw log files per day. Their Hadoop cluster consists of 40 nodes and processes around 2000 MapReduce jobs per day. They developed techniques for partitioning data by date/time and using file revisions to allow incremental processing while ensuring data consistency and freshness of reports.
Mapreduce examples starting from the basic WordCount to a more complex K-means algorithm. The code contained in these slides is available at https://github.com/andreaiacono/MapReduce
The document provides an introduction and agenda for an Oracle Database 11g SQL Fundamentals course. It outlines the course objectives, such as understanding SQL and being able to retrieve, manipulate and manage data. It describes the topics that will be covered each day, including SQL statements, functions, queries, DML and DDL. It also lists the appendixes that provide additional resources and practice materials for students.
Map Reduce is a parallel and distributed approach developed by Google for processing large data sets. It has two key components - the Map function which processes input data into key-value pairs, and the Reduce function which aggregates the intermediate output of the Map into a final result. Input data is split across multiple machines which apply the Map function in parallel, and the Reduce function is applied to aggregate the outputs.
Hadoop is an open-source software framework for distributed storage and processing of large datasets across clusters of computers. It provides reliable storage through HDFS and distributed processing via MapReduce. HDFS handles storage and MapReduce provides a programming model for parallel processing of large datasets across a cluster. The MapReduce framework consists of a mapper that processes input key-value pairs in parallel, and a reducer that aggregates the output of the mappers by key.
A MapReduce job usually splits the input data-set into independent chunks which are processed by the map tasks in a completely parallel manner. The framework sorts the outputs of the maps, which are then input to the reduce tasks. Typically both the input and the output of the job are stored in a file-system.
This document provides an overview of MapReduce concepts including:
1. It describes the anatomy of MapReduce including the map and reduce phases, intermediate data, and final outputs.
2. It explains key MapReduce terminology like jobs, tasks, task attempts, and the roles of the master and slave nodes.
3. It discusses MapReduce data types, input formats, record readers, partitioning, sorting, and output formats.
Brief introduction on Hadoop,Dremel, Pig, FlumeJava and CassandraSomnath Mazumdar
This document provides an overview of several big data technologies including MapReduce, Pig, Flume, Cascading, and Dremel. It describes what each technology is used for, how it works, and example applications. MapReduce is a programming model for processing large datasets in a distributed environment, while Pig, Flume, and Cascading build upon MapReduce to provide higher-level abstractions. Dremel is an interactive query system for nested and complex datasets that uses a column-oriented data storage format.
... or how to query an RDF graph with 28 billion triples in a standard laptop
These slides correspond to my talk at the Stanford Center for Biomedical Informatics, on 25th April 2018
Hadoop and Pig are tools for analyzing large datasets. Hadoop uses MapReduce and HDFS for distributed processing and storage. Pig provides a high-level language for expressing data analysis jobs that are compiled into MapReduce programs. Common tasks like joins, filters, and grouping are built into Pig for easier programming compared to lower-level MapReduce.
Hadoop is an open-source framework for distributed storage and processing of large datasets across clusters of computers. It consists of HDFS for distributed storage and MapReduce for distributed processing. HDFS stores large files across multiple machines and provides high throughput access to application data. MapReduce allows processing of large datasets in parallel by splitting the work into independent tasks called maps and reduces. Companies use Hadoop for applications like log analysis, data warehousing, machine learning, and scientific computing on large datasets.
This page provides access to information about how to integrate Apache Hadoop with Lustre. We have made several enhancements to improve the use of Hadoop with Lustre and have conducted performance tests to compare the performance of Lustre vs. HDFS when used with Hadoop.
http://wiki.lustre.org/index.php/Integrating_Hadoop_with_Lustre
RHive aims to integrate R and Hive by allowing analysts to use R's familiar environment while leveraging Hive's capabilities for big data analysis. RHive allows R functions and objects to be used in Hive queries through RUDFs and RUDAFs. It also provides functions like napply to analyze big data in HDFS using R in a distributed manner. RHive provides a bridge between the two environments without requiring users to learn MapReduce programming.
This document summarizes Mark Levy's presentation on using Hadoop for algorithms on user data at Last.fm. It describes how Last.fm uses Hadoop to compute music charts from over 1 billion user scrobbles per month and calculate royalties. It also discusses using Hadoop for topic modeling of user profiles and documents through LDA, graph recommendations through label propagation on the user-item graph, and processing audio files to extract metadata through a map-reduce approach.
Hadoop, being a disruptive data processing framework, has made a large impact in the data ecosystems of today. Enabling business users to translate existing skills to Hadoop is necessary to encourage the adoption and allow businesses to get value out of their Hadoop investment quickly. R, being a prolific and rapidly growing data analysis language, now has a place in the Hadoop ecosystem. With the advent of technologies such as RHadoop, optimizing R workloads for use on Hadoop has become much easier. This session will help you understand how RHadoop projects such as RMR, and RHDFS work with Hadoop, and will show you examples of using these technologies on the Hortonworks Data Platform.
This document provides an introduction to coalesced hashing, a technique for storing and retrieving records from a database. Coalesced hashing stores records in two areas: an address region and a cellar. It is sensitive to the relative sizes of these areas, represented by an address factor. The document analyzes how to optimize this factor to minimize search time. It finds the compromise address factor of 0.86 works well. Coalesced hashing with this optimized factor outperforms other methods like separate chaining and linear probing.
The document is a past exam paper for an Advanced Data Structures course. It contains 8 questions related to various data structures and algorithms topics. Students are instructed to answer any 5 of the 8 questions, which are worth 16 marks each. The questions cover topics such as templates, exception handling, linked lists, hash tables, binary search trees, and string matching algorithms.
Speaking of big data analysis, what comes to mind is possibly using HDFS and MapReduce within Hadoop. But to write a MapReduce program, one must face the problem of learning how to write native java. One might wonder is it possible to use R, the most popular language adapted by data scientist, to implement MapReduce program? And through the integration or R and Hadoop, is it truly one can unleash the power of parallel computing and big data analysis?
This slide introduces how to install RHadoop step by step, and introduces how to write a MapReduce program through R. What is more, this slide will discuss whether RHadoop is really a light for big data analysis, or just another method to write MapReduce Program.
Please mail me if you found any problem toward the slide. EMAIL: tr.ywchiu@gmail.com
談到巨量資料,通常大家腦海中聯想到的就是使用Hadoop 的 MapReduce 和HDFS,但是撰寫MapReduce,則就必須要學會撰寫Java 或透過Thrift 接口才能撰寫。但R是否有辦法運行在Hadoop 上呢 ? 而使用R + Hadoop,是否就真的能結合R強大的分析功能,分析巨量資料呢 ?
本次講題將介紹如何Step by step 在Hadoop 上安裝RHadoop相關套件,並介紹如何撰寫R的MapReduce 程式。更重要的是,此次將探討使用RHadoop 是否為巨量資料分析找到一盞明燈? 或者只是另一套實作方法而已?
Hadoop World 2011: The Powerful Marriage of R and Hadoop - David Champagne, R...Cloudera, Inc.
When two of the most powerful innovations in modern analytics come together, the result is revolutionary. This session will provide an overview of R, the Open Source programming language used by more than 2 million users that was specifically developed for statistical analysis and data visualization. It will discuss the ways that R and Hadoop have been integrated and look at use case that provides real-world experience. Finally it will provide suggestions of how enterprises can take advantage of both of these industry-leading technologies.
The document discusses using MapReduce to efficiently calculate pairwise document similarity in large document collections. It describes building an inverted index that maps each term to the documents that contain it and associated term weights. This index is generated by mappers emitting term keys and (document, weight) value tuples, which reducers write to disk. Pairwise similarity is then calculated by mappers generating key tuples for all document pairs from a term's postings, with values of the product of weights, representing individual term contributions. Reducers sum these contributions to generate the final similarity score for each pair.
Hw09 Production Deep Dive With High AvailabilityCloudera, Inc.
ContextWeb is an online advertisement company that processes large volumes of log data using Hadoop. They process up to 120GB of raw log files per day. Their Hadoop cluster consists of 40 nodes and processes around 2000 MapReduce jobs per day. They developed techniques for partitioning data by date/time and using file revisions to allow incremental processing while ensuring data consistency and freshness of reports.
Mapreduce examples starting from the basic WordCount to a more complex K-means algorithm. The code contained in these slides is available at https://github.com/andreaiacono/MapReduce
The document provides an introduction and agenda for an Oracle Database 11g SQL Fundamentals course. It outlines the course objectives, such as understanding SQL and being able to retrieve, manipulate and manage data. It describes the topics that will be covered each day, including SQL statements, functions, queries, DML and DDL. It also lists the appendixes that provide additional resources and practice materials for students.
Map Reduce is a parallel and distributed approach developed by Google for processing large data sets. It has two key components - the Map function which processes input data into key-value pairs, and the Reduce function which aggregates the intermediate output of the Map into a final result. Input data is split across multiple machines which apply the Map function in parallel, and the Reduce function is applied to aggregate the outputs.
Hadoop is an open-source software framework for distributed storage and processing of large datasets across clusters of computers. It provides reliable storage through HDFS and distributed processing via MapReduce. HDFS handles storage and MapReduce provides a programming model for parallel processing of large datasets across a cluster. The MapReduce framework consists of a mapper that processes input key-value pairs in parallel, and a reducer that aggregates the output of the mappers by key.
A MapReduce job usually splits the input data-set into independent chunks which are processed by the map tasks in a completely parallel manner. The framework sorts the outputs of the maps, which are then input to the reduce tasks. Typically both the input and the output of the job are stored in a file-system.
This document provides an overview of MapReduce concepts including:
1. It describes the anatomy of MapReduce including the map and reduce phases, intermediate data, and final outputs.
2. It explains key MapReduce terminology like jobs, tasks, task attempts, and the roles of the master and slave nodes.
3. It discusses MapReduce data types, input formats, record readers, partitioning, sorting, and output formats.
Brief introduction on Hadoop,Dremel, Pig, FlumeJava and CassandraSomnath Mazumdar
This document provides an overview of several big data technologies including MapReduce, Pig, Flume, Cascading, and Dremel. It describes what each technology is used for, how it works, and example applications. MapReduce is a programming model for processing large datasets in a distributed environment, while Pig, Flume, and Cascading build upon MapReduce to provide higher-level abstractions. Dremel is an interactive query system for nested and complex datasets that uses a column-oriented data storage format.
... or how to query an RDF graph with 28 billion triples in a standard laptop
These slides correspond to my talk at the Stanford Center for Biomedical Informatics, on 25th April 2018
Hadoop and Pig are tools for analyzing large datasets. Hadoop uses MapReduce and HDFS for distributed processing and storage. Pig provides a high-level language for expressing data analysis jobs that are compiled into MapReduce programs. Common tasks like joins, filters, and grouping are built into Pig for easier programming compared to lower-level MapReduce.
Hadoop is an open-source framework for distributed storage and processing of large datasets across clusters of computers. It consists of HDFS for distributed storage and MapReduce for distributed processing. HDFS stores large files across multiple machines and provides high throughput access to application data. MapReduce allows processing of large datasets in parallel by splitting the work into independent tasks called maps and reduces. Companies use Hadoop for applications like log analysis, data warehousing, machine learning, and scientific computing on large datasets.
This deck was presented at the Spark meetup at Bangalore. The key idea behind the presentation was to focus on limitations of Hadoop MapReduce and introduce both Hadoop YARN and Spark in this context. An overview of the other aspects of the Berkeley Data Analytics Stack was also provided.
HDFS-HC: A Data Placement Module for Heterogeneous Hadoop ClustersXiao Qin
An increasing number of popular applications become data-intensive in nature. In the past decade, the World Wide Web has been adopted as an ideal platform for developing data-intensive applications, since the communication paradigm of the Web is sufficiently open and powerful. Data-intensive applications like data mining and web indexing need to access ever-expanding data sets ranging from a few gigabytes to several terabytes or even petabytes. Google leverages the MapReduce model to process approximately twenty petabytes of data per day in a parallel fashion. In this talk, we introduce the Google’s MapReduce framework for processing huge datasets on large clusters. We first outline the motivations of the MapReduce framework. Then, we describe the dataflow of MapReduce. Next, we show a couple of example applications of MapReduce. Finally, we present our research project on the Hadoop Distributed File System.
The current Hadoop implementation assumes that computing nodes in a cluster are homogeneous in nature. Data locality has not been taken into
account for launching speculative map tasks, because it is
assumed that most maps are data-local. Unfortunately, both
the homogeneity and data locality assumptions are not satisfied
in virtualized data centers. We show that ignoring the datalocality issue in heterogeneous environments can noticeably
reduce the MapReduce performance. In this paper, we address
the problem of how to place data across nodes in a way that
each node has a balanced data processing load. Given a dataintensive application running on a Hadoop MapReduce cluster,
our data placement scheme adaptively balances the amount of
data stored in each node to achieve improved data-processing
performance. Experimental results on two real data-intensive
applications show that our data placement strategy can always
improve the MapReduce performance by rebalancing data
across nodes before performing a data-intensive application
in a heterogeneous Hadoop cluster.
This document provides an introduction to Hadoop, including its motivation and key components. It discusses the scale of cloud computing that Hadoop addresses, and describes the core Hadoop technologies - the Hadoop Distributed File System (HDFS) and MapReduce framework. It also briefly introduces the Hadoop ecosystem, including other related projects like Pig, HBase, Hive and ZooKeeper. Sample code is walked through to illustrate MapReduce programming. Key aspects of HDFS like fault tolerance, scalability and data reliability are summarized.
The document provides an introduction to Hadoop, including an overview of its core components HDFS and MapReduce, and motivates their use by explaining the need to process large amounts of data in parallel across clusters of computers in a fault-tolerant and scalable manner. It also presents sample code walkthroughs and discusses the Hadoop ecosystem of related projects like Pig, HBase, Hive and Zookeeper.
The document discusses linking the statistical programming language R with the Hadoop platform for big data analysis. It introduces Hadoop and its components like HDFS and MapReduce. It describes three ways to link R and Hadoop: RHIPE which performs distributed and parallel analysis, RHadoop which provides HDFS and MapReduce interfaces, and Hadoop streaming which allows R scripts to be used as Mappers and Reducers. The goal is to use these methods to analyze large datasets with R functions on Hadoop clusters.
Hadoop Institutes: kelly technologies are the best Hadoop Training Institutes in Hyderabad. Providing Hadoop training by real time faculty in Hyderabad.
http://www.kellytechno.com/Hyderabad/Course/Hadoop-Training
Apache Spark is a fast, general engine for large-scale data processing. It supports batch, interactive, and stream processing using a unified API. Spark uses resilient distributed datasets (RDDs), which are immutable distributed collections of objects that can be operated on in parallel. RDDs support transformations like map, filter, and reduce and actions that return final results to the driver program. Spark provides high-level APIs in Scala, Java, Python, and R and an optimized engine that supports general computation graphs for data analysis.
This document summarizes Spark, a fast and general engine for large-scale data processing. Spark addresses limitations of MapReduce by supporting efficient sharing of data across parallel operations in memory. Resilient distributed datasets (RDDs) allow data to persist across jobs for faster iterative algorithms and interactive queries. Spark provides APIs in Scala and Java for programming RDDs and a scheduler to optimize jobs. It integrates with existing Hadoop clusters and scales to petabytes of data.
Sector is an open source cloud platform designed for data intensive computing. It provides several advantages over Hadoop such as being up to 2x faster, supporting user defined functions, and exploiting data locality and network topology. Sector uses a layered architecture with user defined functions, a distributed file system, and a UDP-based transport protocol. Experimental results show Sector outperforms Hadoop on benchmarks and has less than a 5% performance penalty compared to a local cluster when run on distributed wide area clusters connected by 10Gbps networks.
This is a deck of slides from a recent meetup of AWS Usergroup Greece, presented by Ioannis Konstantinou from the National Technical University of Athens.
The presentation gives an overview of the Map Reduce framework and a description of its open source implementation (Hadoop). Amazon's own Elastic Map Reduce (EMR) service is also mentioned. With the growing interest on Big Data this is a good introduction to the subject.
Similar to Experiences on Processing Spatial Data with MapReduce ssdbm09 (20)
The Microsoft 365 Migration Tutorial For Beginner.pptxoperationspcvita
This presentation will help you understand the power of Microsoft 365. However, we have mentioned every productivity app included in Office 365. Additionally, we have suggested the migration situation related to Office 365 and how we can help you.
You can also read: https://www.systoolsgroup.com/updates/office-365-tenant-to-tenant-migration-step-by-step-complete-guide/
Essentials of Automations: Exploring Attributes & Automation ParametersSafe Software
Building automations in FME Flow can save time, money, and help businesses scale by eliminating data silos and providing data to stakeholders in real-time. One essential component to orchestrating complex automations is the use of attributes & automation parameters (both formerly known as “keys”). In fact, it’s unlikely you’ll ever build an Automation without using these components, but what exactly are they?
Attributes & automation parameters enable the automation author to pass data values from one automation component to the next. During this webinar, our FME Flow Specialists will cover leveraging the three types of these output attributes & parameters in FME Flow: Event, Custom, and Automation. As a bonus, they’ll also be making use of the Split-Merge Block functionality.
You’ll leave this webinar with a better understanding of how to maximize the potential of automations by making use of attributes & automation parameters, with the ultimate goal of setting your enterprise integration workflows up on autopilot.
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.
"$10 thousand per minute of downtime: architecture, queues, streaming and fin...Fwdays
Direct losses from downtime in 1 minute = $5-$10 thousand dollars. Reputation is priceless.
As part of the talk, we will consider the architectural strategies necessary for the development of highly loaded fintech solutions. We will focus on using queues and streaming to efficiently work and manage large amounts of data in real-time and to minimize latency.
We will focus special attention on the architectural patterns used in the design of the fintech system, microservices and event-driven architecture, which ensure scalability, fault tolerance, and consistency of the entire system.
High performance Serverless Java on AWS- GoTo Amsterdam 2024Vadym Kazulkin
Java is for many years one of the most popular programming languages, but it used to have hard times in the Serverless community. Java is known for its high cold start times and high memory footprint, comparing to other programming languages like Node.js and Python. In this talk I'll look at the general best practices and techniques we can use to decrease memory consumption, cold start times for Java Serverless development on AWS including GraalVM (Native Image) and AWS own offering SnapStart based on Firecracker microVM snapshot and restore and CRaC (Coordinated Restore at Checkpoint) runtime hooks. I'll also provide a lot of benchmarking on Lambda functions trying out various deployment package sizes, Lambda memory settings, Java compilation options and HTTP (a)synchronous clients and measure their impact on cold and warm start times.
The Department of Veteran Affairs (VA) invited Taylor Paschal, Knowledge & Information Management Consultant at Enterprise Knowledge, to speak at a Knowledge Management Lunch and Learn hosted on June 12, 2024. All Office of Administration staff were invited to attend and received professional development credit for participating in the voluntary event.
The objectives of the Lunch and Learn presentation were to:
- Review what KM ‘is’ and ‘isn’t’
- Understand the value of KM and the benefits of engaging
- Define and reflect on your “what’s in it for me?”
- Share actionable ways you can participate in Knowledge - - Capture & Transfer
This talk will cover ScyllaDB Architecture from the cluster-level view and zoom in on data distribution and internal node architecture. In the process, we will learn the secret sauce used to get ScyllaDB's high availability and superior performance. We will also touch on the upcoming changes to ScyllaDB architecture, moving to strongly consistent metadata and tablets.
What is an RPA CoE? Session 1 – CoE VisionDianaGray10
In the first session, we will review the organization's vision and how this has an impact on the COE Structure.
Topics covered:
• The role of a steering committee
• How do the organization’s priorities determine CoE Structure?
Speaker:
Chris Bolin, Senior Intelligent Automation Architect Anika Systems
Fueling AI with Great Data with Airbyte WebinarZilliz
This talk will focus on how to collect data from a variety of sources, leveraging this data for RAG and other GenAI use cases, and finally charting your course to productionalization.
Your One-Stop Shop for Python Success: Top 10 US Python Development Providersakankshawande
Simplify your search for a reliable Python development partner! This list presents the top 10 trusted US providers offering comprehensive Python development services, ensuring your project's success from conception to completion.
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.
LF Energy Webinar: Carbon Data Specifications: Mechanisms to Improve Data Acc...DanBrown980551
This LF Energy webinar took place June 20, 2024. It featured:
-Alex Thornton, LF Energy
-Hallie Cramer, Google
-Daniel Roesler, UtilityAPI
-Henry Richardson, WattTime
In response to the urgency and scale required to effectively address climate change, open source solutions offer significant potential for driving innovation and progress. Currently, there is a growing demand for standardization and interoperability in energy data and modeling. Open source standards and specifications within the energy sector can also alleviate challenges associated with data fragmentation, transparency, and accessibility. At the same time, it is crucial to consider privacy and security concerns throughout the development of open source platforms.
This webinar will delve into the motivations behind establishing LF Energy’s Carbon Data Specification Consortium. It will provide an overview of the draft specifications and the ongoing progress made by the respective working groups.
Three primary specifications will be discussed:
-Discovery and client registration, emphasizing transparent processes and secure and private access
-Customer data, centering around customer tariffs, bills, energy usage, and full consumption disclosure
-Power systems data, focusing on grid data, inclusive of transmission and distribution networks, generation, intergrid power flows, and market settlement data
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.
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.
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 .
Have you ever been confused by the myriad of choices offered by AWS for hosting a website or an API?
Lambda, Elastic Beanstalk, Lightsail, Amplify, S3 (and more!) can each host websites + APIs. But which one should we choose?
Which one is cheapest? Which one is fastest? Which one will scale to meet our needs?
Join me in this session as we dive into each AWS hosting service to determine which one is best for your scenario and explain why!
Introduction of Cybersecurity with OSS at Code Europe 2024Hiroshi SHIBATA
I develop the Ruby programming language, RubyGems, and Bundler, which are package managers for Ruby. Today, I will introduce how to enhance the security of your application using open-source software (OSS) examples from Ruby and RubyGems.
The first topic is CVE (Common Vulnerabilities and Exposures). I have published CVEs many times. But what exactly is a CVE? I'll provide a basic understanding of CVEs and explain how to detect and handle vulnerabilities in OSS.
Next, let's discuss package managers. Package managers play a critical role in the OSS ecosystem. I'll explain how to manage library dependencies in your application.
I'll share insights into how the Ruby and RubyGems core team works to keep our ecosystem safe. By the end of this talk, you'll have a better understanding of how to safeguard your code.
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
zkStudyClub - LatticeFold: A Lattice-based Folding Scheme and its Application...
Experiences on Processing Spatial Data with MapReduce ssdbm09
1. Experiences on Processing Spatial
Data with MapReduce
Ariel Cary, Zhengguo Sun, Vagelis Hristidis, Naphtali Rishe
Florida International University
School of Computing and Information Sciences
11200 SW 8th St, Miami, FL 33199
{acary001,sunz,vagelis,rishen}@cis.fiu.edu
Sponsored by: NSF Cluster Exploratory (CluE)
2. Agenda
1. Introduction
2. Solving Spatial Problems in MapReduce
• R-Tree Index Construction
• Aerial Image Processing
3. Experimental Results
4. Related Work
5. Conclusion
2 Florida International University
3. Introduction
Spatial databases mainly store:
Raster data (satellite/aerial digital images), and
Vector data (points, lines, polygons).
Traditional sequential computing models may
take excessive time to process large and complex
spatial repositories.
Emerging parallel computing models, such as
MapReduce, provide a potential for scaling data
processing in spatial applications.
3 Florida International University
4. Introduction (cont.)
MapReduce is an emerging massively parallel
computing model (Google) composed of two
functions:
Map: takes a key/value pair, executes some
computation, and emits a set of intermediate
key/value pairs as output.
Reduce: merges its intermediate values, executes
some computation on them, and emits the final
output.
In this work, we present our experiences in
applying the MapReduce model to:
Bulk-construct R-Trees (vector) and
4 Florida International University
Compute aerial image quality (raster)
5. Introduction (cont.)
Apache's Hadoop
Proxy
Linux operating Cloud
system
XEN hypervisor
Hadoop Distributed 1
Internet
File System (HDFS) bin/hadoop dfs put
SOCKS proxy
server 2
bin/hadoop jar
480 computers 3
bin/hadoop dfs get
(nodes), each half
terabytes storage
5 Florida International University
6. 2. Solving Spatial Problems in
MapReduce
• R-Tree Index Construction
• Aerial Image Processing
7. MapReduce (MR) R-Tree
Construction
R-Tree Bulk-Construction
Every object o in database D has two attributes:
o.id - the object’s unique identifier.
o.P - the object’s location in some spatial domain.
The goal is to build an R-Tree index on D.
MapReduce Algorithm
1. Database partitioning function computation
(MR).
2. A small R-Tree is created for each partition (MR).
3. The small R-Trees are merged into the final R-
Tree.
7 Florida International University
8. Phase 1 – Partitioning Function
– Goal: compute f to assign objects of D into one of
RMap and Reduce inputs/outputss.t.:
possible partitions in computing partitioning function f.
–Function Input: (Key, Value) Output: (Key,are
R (ideally) equally-sized partitions Value)
generated (minimal variance(C, U(o.P))
Map (o.id, o.P) is acceptable).
Reduce (C, list(ui, i=1, .., L)) S´
– Objects close in the spatial domain are placed
Where: within the same partition.
• o is an solution:
– Proposed spatial object in the database.
• C which is a constant that helps in sending Mappers'
– Use Z-order space-filling curve to map spatial
outputs to a single Reducer.
• coordinate samples (3%) into an value.
U is a space-filling curve, e.g. Z-order sorted
• sequence. containing R-1 splitting points.
S' is an array
8
– Collect splitting points that partition the
Florida International University
sequence in R ranges.
9. Phase 2 - R-Tree Construction in MR
Mappers compute f() values for objects.
Reducers compute an R-Tree for each group of
objects with identical f() value
MapReduce functions in constructing R-Trees.
Function Input: (Key, Value) Output: (Key, Value)
Map (o.id, o.P) (f(o.P), o)
Reduce (f(o.P), list(oi, i=1, .., A)) tree.root
Where:
• o is an spatial object in the database.
• f is the partitioning function computed in phase
1.
• Tree.root is the R-Tree root node.
9 Florida International University
10. Phase 3 - R-Tree Consolidation
sequential process
10 Florida International University
11. Image Processing in MapReduce
Aerial Image Quality Computation
Let d be a orthorectified aerial photography (DOQQ)
file and t be a tile inside d, d.name is d’s file name
and t.q is the quality information of tile t.
The goal is to compute a quality bitmap for d.
MapReduce Algorithm
A customized InputFormatter partitions each DOQQ
file d into several splits containing multiple tiles.
The Mappers compute the quality bitmap for each
tile inside a split.
The Reducers merge all the bitmaps that belongs to
a file d and write them to an output file.
11 Florida International University
12. Image Processing in MapReduce
MapReduce Algorithm
Input and output of map and reduce functions
Function Input: (Key, Value) Output: (Key, Value)
Map (d.name+t.id, t) (d.name, (t.id,t.q))
Reduce (d.name, list(t.id,t.q)) Quality-bitmap of d
Where:
• d is a DOQQ file.
• t is a tile in d.
• t.q is the quality bitmap of t.
12 Florida International University
14. Experimental Results: Setting
Data Set Table 4. Spatial data sets used in experiments*.
Problem Data Data size
Objects Description
set (GB)
R-Tree FLD 11.4 M 5 Points of properties in the state of Florida.
Yellow pages directory of points of businesses mostly
YPD 37 M 5.3
in the United States but also in other countries.
Image Miami- Aerial imagery of Miami-Dade county, FL (3-inch
482 files 52
Quality Dade resolution)
* Data sets supplied by the High Performance Database Research Center at Florida International University
Environment
The cluster was provided by the Google and IBM
Academic Cluster Computing Initiative.
The cluster contains around 480 computers running
Hadoop - open source MapReduce.
14 Florida International University
15. Experimental Results: R-Tree
R-Tree Construction Performance Metrics
30.00 60.00
25.00 50.00
MR2 MR2
20.00 40.00
Time (min)
Time (min)
MR1 MR1
15.00 30.00
10.00 20.00
5.00 10.00
0.00 0.00
2 4 8 16 32 64 4 8 16 32 64
Reducers Reducers
(a) FLD data set (b) YPD data set
MapReduce job completion times for various number of reducers in phase-2 (MR2).
15 Florida International University
16. Experimental Results: R-Tree
MapReduce R-Trees vs. Single Process (SP)
Objects per Reducer Consolidated R-Tree
Data set R Average Stdev Nodes Height
FLD 2 5,690,419 12,183 172,776 4
4 2,845,210 6,347 172,624 4
8 1,422,605 2,235 173,141 4
16 711,379 2,533 162,518 4
32 355,651 2,379 173,273 3
64 177,826 1,816 173,445 3
SP 11,382,185 0 172,681 4
YPD 4 9,257,188 22,137 568,854 4
8 4,628,594 9,413 568,716 4
16 2,314,297 7,634 568,232 4
32 1,157,149 6,043 567,550 4
64 578,574 2,982 566,199 4
SP 37,034,126 0 587,353 5
16 Florida International University
17. Experimental Results: Imagery
Tile Quality Computation
25 4
Reduce 3.5
Reduce
20 Map
Map 3
Time (min)
Time (min)
15 2.5
2
10
1.5
5 1
0.5
0 0
4 8 16 32 64 128 256 512 2 4 8 16
Reducers Size of data (GB)
(a) Fixed data size, variable Reducers (b) Variable data size, fixed Reducers
Fig. 9. MapReduce job completion time for tile quality computation
17 Florida International University
19. Related Work
Previous works on R-Tree parallel construction faced
intrinsic distributed computing problems: load
balancing, process scheduling, fault tolerance, etc.
Schnitzer and Leutenegger [16] proposed a Master-
Client R-Tree, where the data set is first partitioned
using Hilbert packing sort algorithm, then the
partitions are declustered into a number of
processors, where individual trees are built. At the
end, a master process combines the individual trees
into the final R-Tree.
Papadopoulos and Manolopoulos [17] proposed a
methodology for sampling-based space partitionining,
load balancing, and partition assignment into a set of
Florida International University
19
processors in parallely building R-Trees.
21. Conclusion
We used the MapReduce model to solve two
spatial problems on a Google&IBM cluster:
(a) Bulk-construction of R-Trees and
(b) Aerial image quality computation
MapReduce can dramatically improve task
completion times. Our experiments show close to
linear scalability.
Our experience in this work shows MapReduce
has the potential to be applicable to more
complex spatial problems.
21 Florida International University
22. References
[1] Antonin Guttman: R-Trees: A Dynamic Index Structure for Spatial Searching.
SIGMOD 1984:47-57.
[2] NSF Cluster Exploratory Program:
http://www.nsf.gov/pubs/2008/nsf08560/nsf08560.htm
[3] Google&IBM Academic Cluster Computing Initiative:
http://www.google.com/intl/en/press/pressrel/20071008_ibm_univ.html
[4] Apache Hadoop project: http://hadoop.apache.org
[6] Jeffrey Dean, Sanjay Ghemawat: MapReduce: Simplified data processing on
large clusters. In Proceedings of the 6th Conference on Symposium on
Opearting Systems Design & Implementation, USENIX Association, Volume 6,
pp. 10-10, December 2004.
[12] High Performance Database Research Center (HPDRC), Research
Division of the Florida International University, School of Computing and
Information Sciences, University Park, Telephone: (305) 348-1706, FIU ECS-243,
Miami, FL 33199.
[16] Schnitzer B., Leutenegger S.T.: Master-client R-trees: a new parallel R-
tree architecture, In Proceedings of the 11th International Conference on
Scientific and Statistical Database Management, pp. 68-77, August 1999.
[17] Apostolos Papadopoulos, Yannis Manolopoulos: Parallel bulk-loading of
spatial data, Parallel Computing, Volume 29, Issue 10, pp. 1419 - 1444, October
2003.
22 Florida International University