A presentation I delivered to the Melbourne Ruby User's Group on some of the things Rails developers need to be aware of when getting a Rails application running on top of JRuby.
Cassandra Summit 2014: Deploying Cassandra for Call of DutyDataStax Academy
Presenters: Seán O Sullivan, Service Reliability Engineer & Tim Czerniak, Software Engineer at Demonware
This presentation covers the eight-month evaluation process we underwent to migrate some of Call of Duty’s core services from MySQL to Cassandra. We will outline our requirements, the process we followed for the evaluation, decisions we made around our schema, configuration and hardware, and some issues we encountered.
A Gentle Introduction to Functions-as-a-ServiceValeri Karpov
Slides from my talk on functions-as-a-service at Wyncode Academy in Miami in April '18. Provides an overview of the tradeoffs between different FaaS providers
Zero downtime deployments with laravel envoyTung Nguyen
This document discusses zero downtime deployments using Laravel Envoy. It begins with fundamentals of deployment including definitions, best practices, and tools. Common deployment tools mentioned include Capistrano, Ansible, and Envoy. The document then introduces Laravel Envoy, describing it as a tool to define common tasks on remote servers using Blade syntax. Key points about Envoy include installing it globally, writing tasks in an Envoy.blade.php file, and running tasks via the envoy command. The document concludes with an overview of how Envoy enables zero downtime deployments through stories for setup, deploy, and rollback.
A Practical Introduction to Functions-as-a-ServiceValeri Karpov
This document discusses functions-as-a-service (FaaS) and provides an introduction to using AWS Lambda. It outlines the advantages of FaaS such as infinitely scalable devops without server management. It demonstrates a basic "Hello World" Lambda function and connecting Lambda functions to MongoDB. It notes limitations such as cold start times and that database performance is more important than app servers for most use cases. It recommends FaaS for non performance-sensitive backends and provides further reading on serverless platforms and async/await.
- Advanced proxying allows a Zarafa server environment to scale by redirecting requests to other servers and balancing the load across multiple servers.
- Hardware or software load balancers like Apache can be used to proxy traffic and route users to different Zarafa servers to improve scalability and handle failover.
- Configuring Apache with mod_rewrite and a sticky cookie allows it to proxy requests and balance load across multiple backend Zarafa servers in a clustered environment.
Understanding what happens on the client side is not easy. When you user visits your website you need to check his location, his device, connection speed, browser, and what page he is visiting.
After gathering all this data, you also need to check what happened. How long it takes for him to see the page? How long it takes until the page is fully loaded and working? If there was a JS error what was it and why can’t you replicate it? Most of the users don’t have powerful machines, with fast-connections. In this talk we will analyze the tools you can use to profile the client, synthetic and RUM analysis and how you can improve the performance on the client side. Basic and more advanced tips with real examples.
Drupal High Availability High Performance 2012Amazee Labs
This document discusses strategies for achieving high availability and high performance with Drupal. It recommends using redundant web and database servers, load balancers, caching with Varnish and Memcache, and a distributed file system like GlusterFS. MySQL master-slave replication is suggested for database redundancy. The goal is a scalable system with no single point of failure and fast response times.
This document discusses various options for deploying Rails applications in production environments, including Platform as a Service (PaaS) options like Heroku, shared web hosting, virtual private servers, and infrastructure as a service providers like Amazon Web Services. It also covers selecting and configuring a web server (Nginx or Apache), Rails application servers (Unicorn, Thin, Passenger), and deployment tools like Capistrano. The ideal scalable architecture uses a content delivery network, load balancers, and multiple application servers behind a reverse proxy like Nginx.
Cassandra Summit 2014: Deploying Cassandra for Call of DutyDataStax Academy
Presenters: Seán O Sullivan, Service Reliability Engineer & Tim Czerniak, Software Engineer at Demonware
This presentation covers the eight-month evaluation process we underwent to migrate some of Call of Duty’s core services from MySQL to Cassandra. We will outline our requirements, the process we followed for the evaluation, decisions we made around our schema, configuration and hardware, and some issues we encountered.
A Gentle Introduction to Functions-as-a-ServiceValeri Karpov
Slides from my talk on functions-as-a-service at Wyncode Academy in Miami in April '18. Provides an overview of the tradeoffs between different FaaS providers
Zero downtime deployments with laravel envoyTung Nguyen
This document discusses zero downtime deployments using Laravel Envoy. It begins with fundamentals of deployment including definitions, best practices, and tools. Common deployment tools mentioned include Capistrano, Ansible, and Envoy. The document then introduces Laravel Envoy, describing it as a tool to define common tasks on remote servers using Blade syntax. Key points about Envoy include installing it globally, writing tasks in an Envoy.blade.php file, and running tasks via the envoy command. The document concludes with an overview of how Envoy enables zero downtime deployments through stories for setup, deploy, and rollback.
A Practical Introduction to Functions-as-a-ServiceValeri Karpov
This document discusses functions-as-a-service (FaaS) and provides an introduction to using AWS Lambda. It outlines the advantages of FaaS such as infinitely scalable devops without server management. It demonstrates a basic "Hello World" Lambda function and connecting Lambda functions to MongoDB. It notes limitations such as cold start times and that database performance is more important than app servers for most use cases. It recommends FaaS for non performance-sensitive backends and provides further reading on serverless platforms and async/await.
- Advanced proxying allows a Zarafa server environment to scale by redirecting requests to other servers and balancing the load across multiple servers.
- Hardware or software load balancers like Apache can be used to proxy traffic and route users to different Zarafa servers to improve scalability and handle failover.
- Configuring Apache with mod_rewrite and a sticky cookie allows it to proxy requests and balance load across multiple backend Zarafa servers in a clustered environment.
Understanding what happens on the client side is not easy. When you user visits your website you need to check his location, his device, connection speed, browser, and what page he is visiting.
After gathering all this data, you also need to check what happened. How long it takes for him to see the page? How long it takes until the page is fully loaded and working? If there was a JS error what was it and why can’t you replicate it? Most of the users don’t have powerful machines, with fast-connections. In this talk we will analyze the tools you can use to profile the client, synthetic and RUM analysis and how you can improve the performance on the client side. Basic and more advanced tips with real examples.
Drupal High Availability High Performance 2012Amazee Labs
This document discusses strategies for achieving high availability and high performance with Drupal. It recommends using redundant web and database servers, load balancers, caching with Varnish and Memcache, and a distributed file system like GlusterFS. MySQL master-slave replication is suggested for database redundancy. The goal is a scalable system with no single point of failure and fast response times.
This document discusses various options for deploying Rails applications in production environments, including Platform as a Service (PaaS) options like Heroku, shared web hosting, virtual private servers, and infrastructure as a service providers like Amazon Web Services. It also covers selecting and configuring a web server (Nginx or Apache), Rails application servers (Unicorn, Thin, Passenger), and deployment tools like Capistrano. The ideal scalable architecture uses a content delivery network, load balancers, and multiple application servers behind a reverse proxy like Nginx.
「PlayFramework関西ビギナーズ in OsakanSpace 第1回」
http://atnd.org/events/33666
Play frameworkの概要と今後についてゆるく説明して、
Playとそのコミュニティを雰囲気を知っていただこうという趣旨で発表しました。
参加された方の半数がPHPユーザだったので、冒頭でPHPユーザの方向けの説明を特別に入れたりして工夫しています。
Next.js has generated a lot of hype in the short time that it’s been out (rightly so). It’s unveiling coincided with an initiative to rebuild Deliveroo's web application as a standalone app. Jasdeep will share his experiences using it so far, including some of the benefits & trade-offs.
Building & Testing Scalable Rails Applicationsevilmike
This document discusses building scalable Rails applications. It covers using multiple Rails processes and servers to handle concurrent requests. It recommends optimizing database queries, caching, offloading long tasks, and serving static assets externally. It also provides tips for load testing including using realistic data and environments, considering location and caching effects, and paying attention to request headers.
Enterprise day 2015 - Continuous delivery at Klarna (Klarna)Riada AB
Overview of how microservices are continuously deployed at Klarna with Stash, JIRA, Jenkins and Amazon Web Services. Examples of multiple development and deployment approaches in AWS and how we aim for having infrastructure as code at Klarna.
Sascha Möllering discusses infrastructure as code and provides an overview of VMware SDKs, Chef, and using Chef to configure JBoss middleware. He explains that VMware has multiple SDKs and that the VI Java SDK simplifies development. Chef is introduced as a tool to automate and standardize server configurations. The presentation then covers using Chef recipes to deploy and configure JBoss application servers and integrating with JBoss Operations Network for monitoring.
This document provides an overview of CoffeeScript, including:
- CoffeeScript compiles one-to-one into equivalent JavaScript code and runs as fast or faster than JavaScript.
- To use CoffeeScript, write code in a .coffee file, compile it to a .js file, and include the .js file in an HTML page like a regular JavaScript file.
- CoffeeScript simplifies JavaScript syntax by removing the need for semicolons, curly braces, and variable declarations and allowing whitespace as delimiters in arrays and functions. It also includes features like an existential operator and simplified switch statements.
The document discusses using PowerShell Desired State Configuration (DSC) to automate the deployment and management of environments. It describes how DSC can be used to specify the desired state of an environment and have PowerShell work to ensure the actual state matches that desired configuration. This involves authoring DSC configurations that define resources and their desired properties, then applying those configurations to automatically install software, configure systems, and ensure services are running as specified. The document provides examples of using DSC to deploy a website along with its database components in a multi-step process.
Challenges Building The New Joomla! Demo & Free Hosting PlatformDaniel Kanchev
This document discusses the challenges of building the new Joomla! demo/free platform. It outlines the goals of demo.joomla.org versus joomla.com and how demo.joomla.org provides real hosting environments without limits while joomla.com has some limits applied. It then describes how the platform provisions accounts super fast using pre-provisioned accounts, dynamic DNS updates, and an auto login system. Finally, it discusses how the platform uses resources efficiently through techniques like Varnish caching, Linux containers, unique storage, and a lightweight Joomla setup.
Running your app in the Cloud is all the rage, but our tools for managing and supporting complex environments lag behind our needs. If we truly want to embrace Infrastructure as a Service, then we must apply standard software development lessons such as: DRY, Versioning, Decomposition, Abstraction and more. Why haven't we taken these lessons to heart?
How We Made Scylla Maintenance Easier, Safer and FasterScyllaDB
Many Scylla maintenance operations require significant data movement between database nodes in a cluster. It is not an easy task to make the management operations efficient while maintaining minimum impact on the workload all the time. In this talk, we will share how we made those maintenance operations easier, safer and faster with the new Scylla features and improvements, e.g., seedless, repair based node operations, smarter off-strategy compaction, io bandwidth limiter for repair and compaction, parallel repair in Scylla Manger and more.
Caching is used to optimize performance by taking advantage of different access speeds of storage mediums. It stores frequently accessed data in faster storage like memory or disk cache. There are different types of caches like browser cache, server cache using memcached, and cache within a request. Memcached is mainly used for read-through caching but has issues like requiring separate deployment and CAS operations. GroupCache is an alternative that avoids duplicated calls to the backend and has better performance without network IO or CAS. Write-through caching aims to have zero reads from the backend but is challenging to implement transactionally at scale.
CoffeeScript is a programming language that compiles to JavaScript. It adds syntactic sugar like Ruby and Python to make JavaScript more readable and concise. CoffeeScript code compiles directly to equivalent JavaScript code without runtime interpretation. This allows seamless use of existing JavaScript libraries. CoffeeScript code is more readable and maintainable due to its indentation-based syntax and lack of semicolons. While it simplifies JavaScript programming, an additional compilation step is required and errors can be difficult to debug due to obfuscated compiled code. Overall, CoffeeScript aims to remove rough edges from JavaScript for a smoother programming experience.
The Stack Exchange infrastructure supports 560 million page views and 34TB of data transferred per month across multiple technology stacks and datacenters. Performance is the top priority, and tools like Mini Profiler, OpServer, and Client Timings are used to monitor and improve performance. The infrastructure is designed with redundancy across networks, load balancers, web and database servers, caching, and search to ensure high availability and fast response times below 60ms for core pages.
1. The document discusses how OpsWorks has made the presenter's life easier as a developer who also handles operations. OpsWorks provides hosted infrastructure on AWS for deploying applications using Chef recipes.
2. It describes the main structures in OpsWorks - stacks, layers, apps, and instances. Stacks represent entire applications, layers define different parts like web servers, apps contain specific settings, and instances define the servers.
3. The presenter discusses using OpsWorks with Ruby on Rails applications, including customizing Chef recipes, deploying code, and integrating other AWS services for monitoring, security, and scaling. While documentation can be confusing, OpsWorks provides an easy way for developers to manage operations.
Queueing Theory is perhaps one of the most important mathematical theories in systems design and analysis, yet only few engineers learn it. This talk teaches the basics of queueing theory and explores the ramifications of queue behavior on system performance and resiliency. This talk aims to give practical skills that can be applied better build and tune your systems. The talk covers:
- Queueing delays
- Queueing capacity
- Little's Law and how to apply it
- Proper sizing of thread and connection pools
In the last two years, we transitioned the most-asked-for features from our successful MarvinSketch desktop application to a new lightweight web component: Marvin JS. However this was not a simple copy/pasting of features. The challenges of JavaScript technology, the possibilities of touch screen drawing and the benefits of hindsight made us re-imagine even the most basic drawing features to create a clean, straight forward user-oriented tool.
Scylla operator is finally generally availableScyllaDB
Scylla Kubernetes support is long anticipated. Powered by Kubernetes, Scylla becomes easy to manage. Scale out, rolling upgrade, automatic configuration change in canary deployment style and so forth. The talk will demonstrate Scylla Operator 1.0 and go over its supported feature set and describe the roadmap ahead.
This document provides instructions for setting up a Zend Framework development environment and creating a sample project. It discusses requirements like installing Apache, PHP, and a database. It explains how to download and set up Zend Framework, configure the include path and environment variables. It demonstrates creating a sample "demo" project using the zend command line tool and describes the basic folder structure generated. It also covers setting up a project in NetBeans IDE and debugging PHP projects.
ProxySQL Use Case Scenarios / Alkin Tezuysal (Percona)Ontico
HighLoad++ 2017
Зал «Кейптаун», 8 ноября, 14:00
Тезисы:
http://www.highload.ru/2017/abstracts/3114.html
ProxySQL aims to be the most powerful proxy in the MySQL ecosystem. It is protocol-aware and able to provide high availability (HA) and high performance with no changes in the application, using several built-in features and integration with clustering software. During this session we will quickly introduce its main features, so to better understand how it works. We will then describe multiple use case scenarios in which ProxySQL empowers large MySQL installations to provide HA with zero downtime, read/write split, query rewrite, sharding, query caching, and multiplexing using SSL across data centers.
Developing Locally with WordPress: No More Cowboy CodingMatt Banks
Discussing how to setup a local development environment for WordPress and why you want to develop and test locally. Find out how to fix problems like “it works on my machine” before they happen, and how to test updates and changes without cowboy coding and breaking your website.
This document summarizes a presentation about JRuby, an implementation of the Ruby programming language that runs on the Java Virtual Machine. It discusses what JRuby is, how to get started with it, details of its implementation including compilation and threading, and how it addresses various issues with Ruby like performance, memory management, and integration with Java. It also covers some JRuby projects and potential future directions.
This document provides an overview of JRuby, an implementation of the Ruby programming language that runs on the Java Virtual Machine (JVM). It discusses key features of JRuby including its compiler, core class implementations, threading model, and performance improvements compared to other Ruby implementations. The document also outlines several JRuby projects that integrate Ruby and Java such as JRuby on Rails, JtestR, and Ruvlets.
「PlayFramework関西ビギナーズ in OsakanSpace 第1回」
http://atnd.org/events/33666
Play frameworkの概要と今後についてゆるく説明して、
Playとそのコミュニティを雰囲気を知っていただこうという趣旨で発表しました。
参加された方の半数がPHPユーザだったので、冒頭でPHPユーザの方向けの説明を特別に入れたりして工夫しています。
Next.js has generated a lot of hype in the short time that it’s been out (rightly so). It’s unveiling coincided with an initiative to rebuild Deliveroo's web application as a standalone app. Jasdeep will share his experiences using it so far, including some of the benefits & trade-offs.
Building & Testing Scalable Rails Applicationsevilmike
This document discusses building scalable Rails applications. It covers using multiple Rails processes and servers to handle concurrent requests. It recommends optimizing database queries, caching, offloading long tasks, and serving static assets externally. It also provides tips for load testing including using realistic data and environments, considering location and caching effects, and paying attention to request headers.
Enterprise day 2015 - Continuous delivery at Klarna (Klarna)Riada AB
Overview of how microservices are continuously deployed at Klarna with Stash, JIRA, Jenkins and Amazon Web Services. Examples of multiple development and deployment approaches in AWS and how we aim for having infrastructure as code at Klarna.
Sascha Möllering discusses infrastructure as code and provides an overview of VMware SDKs, Chef, and using Chef to configure JBoss middleware. He explains that VMware has multiple SDKs and that the VI Java SDK simplifies development. Chef is introduced as a tool to automate and standardize server configurations. The presentation then covers using Chef recipes to deploy and configure JBoss application servers and integrating with JBoss Operations Network for monitoring.
This document provides an overview of CoffeeScript, including:
- CoffeeScript compiles one-to-one into equivalent JavaScript code and runs as fast or faster than JavaScript.
- To use CoffeeScript, write code in a .coffee file, compile it to a .js file, and include the .js file in an HTML page like a regular JavaScript file.
- CoffeeScript simplifies JavaScript syntax by removing the need for semicolons, curly braces, and variable declarations and allowing whitespace as delimiters in arrays and functions. It also includes features like an existential operator and simplified switch statements.
The document discusses using PowerShell Desired State Configuration (DSC) to automate the deployment and management of environments. It describes how DSC can be used to specify the desired state of an environment and have PowerShell work to ensure the actual state matches that desired configuration. This involves authoring DSC configurations that define resources and their desired properties, then applying those configurations to automatically install software, configure systems, and ensure services are running as specified. The document provides examples of using DSC to deploy a website along with its database components in a multi-step process.
Challenges Building The New Joomla! Demo & Free Hosting PlatformDaniel Kanchev
This document discusses the challenges of building the new Joomla! demo/free platform. It outlines the goals of demo.joomla.org versus joomla.com and how demo.joomla.org provides real hosting environments without limits while joomla.com has some limits applied. It then describes how the platform provisions accounts super fast using pre-provisioned accounts, dynamic DNS updates, and an auto login system. Finally, it discusses how the platform uses resources efficiently through techniques like Varnish caching, Linux containers, unique storage, and a lightweight Joomla setup.
Running your app in the Cloud is all the rage, but our tools for managing and supporting complex environments lag behind our needs. If we truly want to embrace Infrastructure as a Service, then we must apply standard software development lessons such as: DRY, Versioning, Decomposition, Abstraction and more. Why haven't we taken these lessons to heart?
How We Made Scylla Maintenance Easier, Safer and FasterScyllaDB
Many Scylla maintenance operations require significant data movement between database nodes in a cluster. It is not an easy task to make the management operations efficient while maintaining minimum impact on the workload all the time. In this talk, we will share how we made those maintenance operations easier, safer and faster with the new Scylla features and improvements, e.g., seedless, repair based node operations, smarter off-strategy compaction, io bandwidth limiter for repair and compaction, parallel repair in Scylla Manger and more.
Caching is used to optimize performance by taking advantage of different access speeds of storage mediums. It stores frequently accessed data in faster storage like memory or disk cache. There are different types of caches like browser cache, server cache using memcached, and cache within a request. Memcached is mainly used for read-through caching but has issues like requiring separate deployment and CAS operations. GroupCache is an alternative that avoids duplicated calls to the backend and has better performance without network IO or CAS. Write-through caching aims to have zero reads from the backend but is challenging to implement transactionally at scale.
CoffeeScript is a programming language that compiles to JavaScript. It adds syntactic sugar like Ruby and Python to make JavaScript more readable and concise. CoffeeScript code compiles directly to equivalent JavaScript code without runtime interpretation. This allows seamless use of existing JavaScript libraries. CoffeeScript code is more readable and maintainable due to its indentation-based syntax and lack of semicolons. While it simplifies JavaScript programming, an additional compilation step is required and errors can be difficult to debug due to obfuscated compiled code. Overall, CoffeeScript aims to remove rough edges from JavaScript for a smoother programming experience.
The Stack Exchange infrastructure supports 560 million page views and 34TB of data transferred per month across multiple technology stacks and datacenters. Performance is the top priority, and tools like Mini Profiler, OpServer, and Client Timings are used to monitor and improve performance. The infrastructure is designed with redundancy across networks, load balancers, web and database servers, caching, and search to ensure high availability and fast response times below 60ms for core pages.
1. The document discusses how OpsWorks has made the presenter's life easier as a developer who also handles operations. OpsWorks provides hosted infrastructure on AWS for deploying applications using Chef recipes.
2. It describes the main structures in OpsWorks - stacks, layers, apps, and instances. Stacks represent entire applications, layers define different parts like web servers, apps contain specific settings, and instances define the servers.
3. The presenter discusses using OpsWorks with Ruby on Rails applications, including customizing Chef recipes, deploying code, and integrating other AWS services for monitoring, security, and scaling. While documentation can be confusing, OpsWorks provides an easy way for developers to manage operations.
Queueing Theory is perhaps one of the most important mathematical theories in systems design and analysis, yet only few engineers learn it. This talk teaches the basics of queueing theory and explores the ramifications of queue behavior on system performance and resiliency. This talk aims to give practical skills that can be applied better build and tune your systems. The talk covers:
- Queueing delays
- Queueing capacity
- Little's Law and how to apply it
- Proper sizing of thread and connection pools
In the last two years, we transitioned the most-asked-for features from our successful MarvinSketch desktop application to a new lightweight web component: Marvin JS. However this was not a simple copy/pasting of features. The challenges of JavaScript technology, the possibilities of touch screen drawing and the benefits of hindsight made us re-imagine even the most basic drawing features to create a clean, straight forward user-oriented tool.
Scylla operator is finally generally availableScyllaDB
Scylla Kubernetes support is long anticipated. Powered by Kubernetes, Scylla becomes easy to manage. Scale out, rolling upgrade, automatic configuration change in canary deployment style and so forth. The talk will demonstrate Scylla Operator 1.0 and go over its supported feature set and describe the roadmap ahead.
This document provides instructions for setting up a Zend Framework development environment and creating a sample project. It discusses requirements like installing Apache, PHP, and a database. It explains how to download and set up Zend Framework, configure the include path and environment variables. It demonstrates creating a sample "demo" project using the zend command line tool and describes the basic folder structure generated. It also covers setting up a project in NetBeans IDE and debugging PHP projects.
ProxySQL Use Case Scenarios / Alkin Tezuysal (Percona)Ontico
HighLoad++ 2017
Зал «Кейптаун», 8 ноября, 14:00
Тезисы:
http://www.highload.ru/2017/abstracts/3114.html
ProxySQL aims to be the most powerful proxy in the MySQL ecosystem. It is protocol-aware and able to provide high availability (HA) and high performance with no changes in the application, using several built-in features and integration with clustering software. During this session we will quickly introduce its main features, so to better understand how it works. We will then describe multiple use case scenarios in which ProxySQL empowers large MySQL installations to provide HA with zero downtime, read/write split, query rewrite, sharding, query caching, and multiplexing using SSL across data centers.
Developing Locally with WordPress: No More Cowboy CodingMatt Banks
Discussing how to setup a local development environment for WordPress and why you want to develop and test locally. Find out how to fix problems like “it works on my machine” before they happen, and how to test updates and changes without cowboy coding and breaking your website.
This document summarizes a presentation about JRuby, an implementation of the Ruby programming language that runs on the Java Virtual Machine. It discusses what JRuby is, how to get started with it, details of its implementation including compilation and threading, and how it addresses various issues with Ruby like performance, memory management, and integration with Java. It also covers some JRuby projects and potential future directions.
This document provides an overview of JRuby, an implementation of the Ruby programming language that runs on the Java Virtual Machine (JVM). It discusses key features of JRuby including its compiler, core class implementations, threading model, and performance improvements compared to other Ruby implementations. The document also outlines several JRuby projects that integrate Ruby and Java such as JRuby on Rails, JtestR, and Ruvlets.
JRuby allows running Ruby code on the Java Virtual Machine. This provides access to Java libraries and enables deployment of Ruby/Rails applications as Java web archives for easier hosting. Integrating Rails with JRuby requires plugins like ActiveRecord-JDBC for database access. Performance is currently lower than native Ruby but may improve as JVM optimizations emerge. Full Ruby compatibility remains challenging due to differences from the JVM environment.
JRuby allows developers to use the Ruby programming language on the Java platform. It provides the ability to leverage existing Java libraries and frameworks from Ruby code. This allows developers to benefit from the agility of Ruby and dynamic languages for web development while still taking advantage of robust Java technologies for the backend. Rails applications can also be deployed as WAR files to be run on Java application servers and benefit from features like scalability. Overall, JRuby provides a way to incorporate Ruby into Java/JEE projects for improved productivity through rapid prototyping and dynamic web frameworks while still using reliable Java infrastructure.
The document provides an introduction to the Merb web framework, which is similar to Ruby on Rails but aims to be lighter, more extensible, and faster. It discusses Merb's ideology of keeping the core small and code simple. Key components like routing, views, and plugins are described. Performance tests show Merb using less memory than Rails but slower response times. The author concludes Merb may be worth considering for small tools or limited memory apps, but issues remain with speed on JRuby.
The document provides an introduction to the Merb web framework, which is similar to Ruby on Rails but aims to be lighter, more extensible, and faster. It discusses Merb's ideology of keeping the core small and code simple. Key components like routing, views, and plugins are described. Performance tests show Merb using less memory than Rails but slower response times. The author concludes Merb may be worth considering for small projects or if performance needs outweigh Rails compatibility.
This document discusses how a quiz application achieved high performance and scalability. It started with 30,000 concurrent users and 9 million page views per hour. To optimize, the developers analyzed logs, added indexing, eager loading, caching, bulk writes, master-slave replication, and load testing. They switched from Mongrel to Ebb web servers, seeing a 40% performance gain. Monitoring also revealed browser incompatibilities causing crashes, solved by switching from Nginx to Lighttpd. In total, optimizations led to a 25x performance gain and the ability to handle 5000 simultaneous users.
Ola Bini gave a whirlwind tour of JRuby, a Java implementation of the Ruby programming language. Some key points included: JRuby allows Ruby code to run on the Java virtual machine, taking advantage of features like native threading and access to Java libraries. It can run in several modes including interpreted, compiled, and just-in-time compiled. JRuby is commonly used to run Ruby on Rails applications, and tools like ActiveRecord-JDBC facilitate database access. Several other Ruby tools and frameworks like RSpec work with JRuby. Ola demonstrated several JRuby projects including Profligacy, Rubiq, and Swing wrappers. Future work includes finishing the compiler and exploring alternative interpreters like
NetBeans is an integrated development environment (IDE) written in Java that provides support for developing applications in Ruby and Ruby on Rails. It offers features like code completion, refactoring, debugging and project management functionality. The IDE aims to provide a full-featured environment for developing both Ruby applications and Ruby on Rails web applications.
java database connectivity for java programmingrinky1234
- JDBC (Java Database Connectivity) is a Java API that allows Java programs to connect and execute queries with various databases. It uses JDBC drivers to connect to different database types.
- There are four main types of JDBC drivers: JDBC-ODBC bridge driver, native-API driver, network protocol driver, and thin driver. The thin driver provides the best performance as no additional software is required on the client or server side.
- To connect to a database using JDBC, a program loads the appropriate driver, establishes a connection, creates statements to execute queries, processes result sets, and closes the connection. The example shows how to connect to an Oracle database using JDB
The document discusses JRuby, a Java implementation of the Ruby programming language. It provides an overview of JRuby and its benefits compared to MRI Ruby, including native threading, Unicode support, performance improvements from just-in-time compilation, better memory management from Java's garbage collection, and easier integration with existing Java libraries and enterprise infrastructure. Examples are given of ThoughtWorks projects like Mingle that use JRuby on Rails to take advantage of these benefits.
Laird Best Practices Ajax World West2008rajivmordani
The document outlines best practices for delivering framework products that include Ajax features, discussing selecting an open source framework over custom, providing a public client-side API, and enabling client-side event publishing and subscription. It also presents case studies of Oracle products that demonstrate these practices, such as using Dojo or jQuery and providing APIs for WebLogic Portal and Application Express.
In this session we will take a look at several different methods for building tiered applications. Some of the tiering methodologies include Soap, XML-RPC, RESTful and multiple language architectures. The purpose of this talk will not be to determine which methodology is best, but instead will try to provide an unbiased view of the pros and cons of each.
Introduction to deployment with Ruby on Rails presented at JAX09 in Mainz by Jonathan Weiss.
Learn about the deployment architectures and setups (web and app tier) and using Capistrano/Webistrano.
JRuby is a 100% Java implementation of Ruby that runs on the Java Virtual Machine. It allows Ruby code to leverage features of the JVM like native threading, Unicode support, and scalability. JRuby code can interact with Java classes and libraries. It can run Ruby code in interpret, just-in-time compile, or ahead-of-time compile modes for improved performance. Several large applications and frameworks use JRuby in production.
jRuby fixes some issues with the Ruby programming language like memory leaks and lack of kernel level threading by running Ruby code on the Java Virtual Machine which has features like a sophisticated garbage collector, just-in-time compilation for improved performance, and native threading; benchmarks show jRuby provides much higher concurrency and better performance than Ruby for background processing and web applications; deploying a Ruby application using jRuby and a Java application server like Torquebox allows it to take advantage of the reliability, scalability and deployment features of the Java platform.
Kiki Ahmadi introduces himself as an ITS student and part-time ERP implementor who will be sharing about Java. The presentation covers what Java is, how it uses a Java Virtual Machine (JVM) to compile source code into bytecode that can run on any operating system, and examines some of Java's advantages like portability, safety, and extensive libraries. The document also provides an overview of Java platforms like Java SE and Java EE and recommends getting started with Java by downloading a JDK, learning through tutorials, using an IDE like Netbeans, and coding.
The document discusses various options for implementing distributed processing in Ruby on Rails applications. It describes libraries like DRb, BackgroundRB, Starfish, reliable-message, and AP4R that can be used to distribute tasks across multiple servers. As an example, it outlines how the Working With Rails site used AP4R to distribute the fetching and parsing of third-party RSS feeds across multiple machines to improve performance. It also discusses some challenges of distributed processing and when it makes sense to implement.
Digital Marketing Trends in 2024 | Guide for Staying AheadWask
https://www.wask.co/ebooks/digital-marketing-trends-in-2024
Feeling lost in the digital marketing whirlwind of 2024? Technology is changing, consumer habits are evolving, and staying ahead of the curve feels like a never-ending pursuit. This e-book is your compass. Dive into actionable insights to handle the complexities of modern marketing. From hyper-personalization to the power of user-generated content, learn how to build long-term relationships with your audience and unlock the secrets to success in the ever-shifting digital landscape.
Programming Foundation Models with DSPy - Meetup SlidesZilliz
Prompting language models is hard, while programming language models is easy. In this talk, I will discuss the state-of-the-art framework DSPy for programming foundation models with its powerful optimizers and runtime constraint system.
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.
A Comprehensive Guide to DeFi Development Services in 2024Intelisync
DeFi represents a paradigm shift in the financial industry. Instead of relying on traditional, centralized institutions like banks, DeFi leverages blockchain technology to create a decentralized network of financial services. This means that financial transactions can occur directly between parties, without intermediaries, using smart contracts on platforms like Ethereum.
In 2024, we are witnessing an explosion of new DeFi projects and protocols, each pushing the boundaries of what’s possible in finance.
In summary, DeFi in 2024 is not just a trend; it’s a revolution that democratizes finance, enhances security and transparency, and fosters continuous innovation. As we proceed through this presentation, we'll explore the various components and services of DeFi in detail, shedding light on how they are transforming the financial landscape.
At Intelisync, we specialize in providing comprehensive DeFi development services tailored to meet the unique needs of our clients. From smart contract development to dApp creation and security audits, we ensure that your DeFi project is built with innovation, security, and scalability in mind. Trust Intelisync to guide you through the intricate landscape of decentralized finance and unlock the full potential of blockchain technology.
Ready to take your DeFi project to the next level? Partner with Intelisync for expert DeFi development services today!
Dive into the realm of operating systems (OS) with Pravash Chandra Das, a seasoned Digital Forensic Analyst, as your guide. 🚀 This comprehensive presentation illuminates the core concepts, types, and evolution of OS, essential for understanding modern computing landscapes.
Beginning with the foundational definition, Das clarifies the pivotal role of OS as system software orchestrating hardware resources, software applications, and user interactions. Through succinct descriptions, he delineates the diverse types of OS, from single-user, single-task environments like early MS-DOS iterations, to multi-user, multi-tasking systems exemplified by modern Linux distributions.
Crucial components like the kernel and shell are dissected, highlighting their indispensable functions in resource management and user interface interaction. Das elucidates how the kernel acts as the central nervous system, orchestrating process scheduling, memory allocation, and device management. Meanwhile, the shell serves as the gateway for user commands, bridging the gap between human input and machine execution. 💻
The narrative then shifts to a captivating exploration of prominent desktop OSs, Windows, macOS, and Linux. Windows, with its globally ubiquitous presence and user-friendly interface, emerges as a cornerstone in personal computing history. macOS, lauded for its sleek design and seamless integration with Apple's ecosystem, stands as a beacon of stability and creativity. Linux, an open-source marvel, offers unparalleled flexibility and security, revolutionizing the computing landscape. 🖥️
Moving to the realm of mobile devices, Das unravels the dominance of Android and iOS. Android's open-source ethos fosters a vibrant ecosystem of customization and innovation, while iOS boasts a seamless user experience and robust security infrastructure. Meanwhile, discontinued platforms like Symbian and Palm OS evoke nostalgia for their pioneering roles in the smartphone revolution.
The journey concludes with a reflection on the ever-evolving landscape of OS, underscored by the emergence of real-time operating systems (RTOS) and the persistent quest for innovation and efficiency. As technology continues to shape our world, understanding the foundations and evolution of operating systems remains paramount. Join Pravash Chandra Das on this illuminating journey through the heart of computing. 🌟
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
Salesforce Integration for Bonterra Impact Management (fka Social Solutions A...Jeffrey Haguewood
Sidekick Solutions uses Bonterra Impact Management (fka Social Solutions Apricot) and automation solutions to integrate data for business workflows.
We believe integration and automation are essential to user experience and the promise of efficient work through technology. Automation is the critical ingredient to realizing that full vision. We develop integration products and services for Bonterra Case Management software to support the deployment of automations for a variety of use cases.
This video focuses on integration of Salesforce with Bonterra Impact Management.
Interested in deploying an integration with Salesforce for Bonterra Impact Management? Contact us at sales@sidekicksolutionsllc.com to discuss next steps.
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!
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.
Nunit vs XUnit vs MSTest Differences Between These Unit Testing Frameworks.pdfflufftailshop
When it comes to unit testing in the .NET ecosystem, developers have a wide range of options available. Among the most popular choices are NUnit, XUnit, and MSTest. These unit testing frameworks provide essential tools and features to help ensure the quality and reliability of code. However, understanding the differences between these frameworks is crucial for selecting the most suitable one for your projects.
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!
Let's Integrate MuleSoft RPA, COMPOSER, APM with AWS IDP along with Slackshyamraj55
Discover the seamless integration of RPA (Robotic Process Automation), COMPOSER, and APM with AWS IDP enhanced with Slack notifications. Explore how these technologies converge to streamline workflows, optimize performance, and ensure secure access, all while leveraging the power of AWS IDP and real-time communication via Slack notifications.
Building Production Ready Search Pipelines with Spark and MilvusZilliz
Spark is the widely used ETL tool for processing, indexing and ingesting data to serving stack for search. Milvus is the production-ready open-source vector database. In this talk we will show how to use Spark to process unstructured data to extract vector representations, and push the vectors to Milvus vector database for search serving.