The document provides tips on common scalability mistakes made when designing web applications and strategies to avoid them. It discusses the importance of considering scalability from the beginning, avoiding blocking calls, caching frequently accessed data, optimizing database and file system usage, and using tools like profilers to identify bottlenecks. The key is designing applications that can scale both up and down based on current needs through a proactive, process-oriented approach.
The document provides an overview of scaling principles for web applications, beginning with optimizing a single server application and progressing to more advanced architectures involving load balancing, multiple web/application servers, and multiple database servers. It discusses profiling applications to identify bottlenecks, various caching and optimization strategies, Apache configuration for prefork MPM, and load balancing technologies like DNS round robin, Apache reverse proxy, HAProxy and Pound. Links are provided to additional resources on related topics.
Search in WordPress - how it works and howto customize it
WordPress search customization is a topic we at Seravo get asked about on a frequent basis. There are many different ways to customize the search, and customers understandably want to learn the best practices. The search can be customized quite easily with small changes on PHP code level, and by utilizing MariaDB database’s built-in search functionality. You can also choose a more robust way to do this, and build a new ElasticSearch server just for your case.
These slides are from the webinar on January 14th, 2021: https://seravo.com/blog/webinar-search-function-and-how-to-customize-it/
1) The document provides tips for launching a high-scaling enterprise web application or high-traffic website using Amazon Web Services (AWS).
2) It recommends using existing AWS services like S3 for storage, CloudFront for caching, Elasticache for caching objects and database results, and EC2 for application servers rather than reinventing technologies.
3) The document also suggests using services like RDS to launch database instances for storage and CloudSearch for search capabilities.
This document provides an overview of search engine optimization (SEO) techniques for ranking higher in search engine results pages. It recommends focusing on usability and content quality rather than black hat tricks. The biggest influencers on rankings are external links to a page, especially from high page ranked domains. It also outlines where to start with keywords, how search engines calculate results, important on-page elements, and tools for SEO.
This document provides an overview of the Secure Software Development Lifecycle (SSDLC). It discusses how SSDLC differs from traditional development by focusing on security requirements, design, testing, and operations. Key aspects include threat modeling to identify risks, the principle of least privilege, extensive testing and logging, and having policies and response plans for security incidents. The goal of SSDLC is to build resilience, stability, and trust into software through a more proactive and defensive approach throughout the entire development lifecycle.
The document discusses how HHVM (HipHop Virtual Machine), a just-in-time compiler created by Facebook, can improve the performance of PHP-based websites like WordPress by compiling PHP to bytecode faster than traditional PHP processing. It provides benchmarks showing HHVM's performance advantages over PHP-FPM and describes tools like XHProf that can help optimize WordPress sites to take advantage of HHVM's capabilities. While HHVM has risks with poorly coded themes/plugins, its performance gains make it worth considering as an alternative PHP processor.
Presentation from webinar held on August 19th, 2020, with Xdebug developer Derick Rethans and Seravo CEO Otto Kekäläinen.
This presentation shows you how to use Xdebug (which is very easy with the Seravo WordPress development environment!) to make a record of what the WordPress PHP code does during a website page load, and how to use that information to optimize the performance of your WordPress site.
For a video recording and Dericks presentation see https://seravo.com/blog/webinar-xdebug-profile-php/
This book provides an overview of advanced PHP techniques for building professional web applications. It covers topics like improved session management, multiple database interaction, better form processing, file handling, authentication, error handling, and generating dynamic graphics. The book is intended for PHP developers who want to learn more advanced concepts. It uses numerous code examples to illustrate the techniques.
Less and faster – Cache tips for WordPress developers
Otto Kekäläinen, the code-loving CEO of Seravo held a webinar on May 12, 2020, that focused on the cache: what should a WordPress developer know and which are the best practices to follow?
PHP , Internet Business Marketing , & Good Web Content Go Hand In Hand
PHP scripts allow websites to dynamically generate content which search engines can read as HTML, unlike JavaScript. Forums and blogs are popular PHP scripts that encourage user participation and daily posts, continuously providing new content for search engines. Implementing PHP scripts like forums and blogs is recommended to take advantage of their ability to automatically generate fresh content.
7 things every web developer should know about linux administration
Linux system administration is specialized field in itself. In this presentation, I am going to list 7 Linux administration tasks which a programmer should know to be with ease while deploying or planning deployment of applications.
The document compares the performance of four open source content management systems (CMS): Odoo, Drupal, Magento, and Prestashop. It finds that Odoo consistently outperforms the other CMS across a number of metrics: it is 3 times faster than Drupal and 6 times faster than Magento based on load testing; it can handle more users before timing out; and its codebase is smaller. While the other CMS have improvements to make in terms of HTML validation, Odoo represents the best balance of speed, scalability, and maintainability according to the analysis in the document.
- PHP can be used to build enterprise-level applications and integrate with existing enterprise technologies and architectures. While other technologies may be better suited for certain backend tasks, PHP excels at building scalable web applications.
- Common enterprise design patterns around scalability, high availability, and integrity can be applied to PHP implementations. Specific patterns also exist for scaling MySQL databases and leveraging Apache modules like mod_rewrite.
- PHP applications can interface with Java backends using bridges. This allows leveraging the strengths of each technology by using PHP for the frontend and Java for enterprise services.
Bastian Grimm provides best practices for successfully relaunching a website through migration. He emphasizes thorough documentation, testing, and addressing all technical details. Common problems with migrations include missing or incorrect redirects. Post-migration, it is important to monitor performance, check for errors, and ensure proper indexing of the new site.
Proven ways to improve your website performance optimizing front end and back...
Looking for proven ways to improve your website performance? Check out performance optimisation tips to enhance the front-end and back-end of your application.
El documento presenta los esquemas de iluminación realizados por un grupo de estudiantes de fotografía, incluyendo fotografías tomadas por tres estudiantes usando diferentes modelos, programas de edición y detalles sobre el proceso como el maquillaje y disfraces.
Este documento presenta esquemas de iluminación para fotografía en blanco y negro y a color tomados de libros sobre iluminación fotográfica. Los esquemas son presentados por un grupo de estudiantes de la Escuela de Arte de Sevilla para su práctica sobre iluminación en el estudio fotográfico.
The document provides an overview of advertising targeted towards children. It discusses where advertisements can be found, different types of advertisements, how advertising works, legislation around children's advertising, and concerns around unhealthy advertising influences. It also describes techniques used in advertising, including using celebrities or "real people", marketing directly to teens, and potentially misleading claims.
Este documento presenta los diferentes tipos de iluminación que se pueden usar en un estudio fotográfico, incluyendo luz de 3/4, luz lateral, luz lateral con relleno, contraluz para silueta y para luz de borde, iluminación cenital, nadir y cruzada. El documento fue creado por Samuel J. Salado y María Gómez como parte de un curso de fotografía.
Este documento presenta esquemas de iluminación para fotografía en blanco y negro y a color tomados de libros sobre iluminación fotográfica. Los esquemas son presentados por un grupo de estudiantes de la Escuela de Arte de Sevilla para su práctica sobre iluminación en el estudio fotográfico.
The document discusses best practices for scalability and performance when developing PHP applications. Some key points include profiling and optimizing early, cooperating between development and operations teams, testing on production-like data, caching frequently accessed data, avoiding overuse of hard-to-scale resources, and using compiler caching and query optimization. Decoupling applications, caching, data federation, and replication are also presented as techniques for improving scalability.
This document summarizes techniques for building scalable websites with Perl, including caching whole pages, chunks of HTML/data, and using job queuing. Caching helps performance by reducing workload and scalability by lowering database load. Large sites like Yahoo cache aggressively. Job queuing prevents overloading resources and keeps websites responsive under high demand by lining requests up in a queue.
Domino server and application performance in the real world
The document provides tips and strategies for optimizing Domino server performance, with a focus on addressing disk I/O bottlenecks. It recommends separating database files onto different physical disks based on I/O needs, avoiding journaling file systems for transaction logs, optimizing RAID configurations, and addressing inefficient views and design patterns that can degrade performance. Specific issues covered include transaction logging, indexing, database design, and application usage patterns.
To scale PHP web applications:
1) Focus on fundamentals like testable code, efficient data structures and algorithms, and designing for change.
2) Optimize performance through caching, using databases efficiently, and leveraging PHP features.
3) Employ techniques like asynchronous processing, parallel computing, and service-oriented architectures to spread load across servers.
30 Skills to Master to Become a Senior Software Engineer
The document discusses 30 skills that software engineers should master to become senior engineers, including skills with programming languages like PHP, databases, SQL, HTML, CSS, JavaScript frameworks, build tools like Gulp, version control with Git, server-side frameworks like Laravel, object-relational mappers, and using database seeding and migrations. It emphasizes the importance of being well-rounded and having experience with both front-end and back-end technologies as well as tools that improve productivity and maintainability. Mastering these skills can lead to higher salaries, more leadership opportunities, and building more robust applications.
NoSQL databases are non-relational databases designed for large volumes of data across many servers. They emerged to address scaling and reliability issues with relational databases. While different technologies, NoSQL databases are designed for distribution without a single point of failure and to sacrifice consistency for availability if needed. Examples include Dynamo, BigTable, Cassandra and CouchDB.
The document discusses scalable web architectures and common patterns for scaling web applications. It covers key topics like load balancing, caching, database replication, and data federation. The overall goal of application architecture is to scale traffic and data while maintaining high availability and performance. Horizontal scaling by adding more servers is preferable to vertical scaling of buying larger servers.
The document discusses scalable web architectures and common patterns for scaling web applications. It covers key topics like load balancing, caching, database replication and sharding, and asynchronous queuing to distribute workloads across multiple servers. The goal of these patterns is to scale traffic, data size, and maintainability through horizontal expansion rather than just vertical upgrades.
The document discusses scalable web architectures and common patterns for scaling web applications. It covers key topics like load balancing, caching, database replication and sharding, and asynchronous queuing to distribute workloads across multiple servers. The goal of these patterns is to scale traffic, data size, and maintainability through horizontal expansion rather than just vertical upgrades.
PDF Generation in Rails with Prawn and Prawn-to: John McCaffreyJohn McCaffrey
breakdown of the most commonly used pdf libraries in rails projects,and an in depth review of prawn
example pdfs and code can be seen at prawn.heroku.com
More info at www.RailsPerformance.com
2019 StartIT - Boosting your performance with BlackfireMarko Mitranić
A workshop held in StartIT as part of Catena Media learning sessions.
We aim to dispel the notion that large PHP applications tend to be sluggish, resource-intensive and slow compared to what the likes of Python, Erlang or even Node can do. The issue is not with optimising PHP internals - it's the lack of proper introspection tools and getting them into our every day workflow that counts! In this workshop we will talk about our struggles with whipping PHP Applications into shape, as well as work together on some of the more interesting examples of CPU or IO drain.
The document summarizes a meeting of the Bigtop Working Group. It thanks sponsors for donations and polls attendees about their experience managing proofs of concept (POCs) and interest in careers involving Hadoop. It discusses doing small vs large POCs and the challenges of scope creep. It recommends contributions to open source projects like Bigtop and BenchPress to gain hands-on experience. The document outlines logistics of future sessions and encourages forming groups to work on joint POC projects with mentors' guidance.
The document provides an overview of scaling principles for web applications, beginning with optimizing a single server application and progressing to more advanced architectures involving load balancing, multiple web/application servers, and multiple database servers. It discusses profiling applications to identify bottlenecks, various caching and optimization strategies, Apache configuration for prefork MPM, and load balancing technologies like DNS round robin, Apache reverse proxy, HAProxy and Pound. Links are provided to additional resources on related topics.
Search in WordPress - how it works and howto customize itOtto Kekäläinen
WordPress search customization is a topic we at Seravo get asked about on a frequent basis. There are many different ways to customize the search, and customers understandably want to learn the best practices. The search can be customized quite easily with small changes on PHP code level, and by utilizing MariaDB database’s built-in search functionality. You can also choose a more robust way to do this, and build a new ElasticSearch server just for your case.
These slides are from the webinar on January 14th, 2021: https://seravo.com/blog/webinar-search-function-and-how-to-customize-it/
1) The document provides tips for launching a high-scaling enterprise web application or high-traffic website using Amazon Web Services (AWS).
2) It recommends using existing AWS services like S3 for storage, CloudFront for caching, Elasticache for caching objects and database results, and EC2 for application servers rather than reinventing technologies.
3) The document also suggests using services like RDS to launch database instances for storage and CloudSearch for search capabilities.
This document provides an overview of search engine optimization (SEO) techniques for ranking higher in search engine results pages. It recommends focusing on usability and content quality rather than black hat tricks. The biggest influencers on rankings are external links to a page, especially from high page ranked domains. It also outlines where to start with keywords, how search engines calculate results, important on-page elements, and tools for SEO.
This document provides an overview of the Secure Software Development Lifecycle (SSDLC). It discusses how SSDLC differs from traditional development by focusing on security requirements, design, testing, and operations. Key aspects include threat modeling to identify risks, the principle of least privilege, extensive testing and logging, and having policies and response plans for security incidents. The goal of SSDLC is to build resilience, stability, and trust into software through a more proactive and defensive approach throughout the entire development lifecycle.
The document discusses how HHVM (HipHop Virtual Machine), a just-in-time compiler created by Facebook, can improve the performance of PHP-based websites like WordPress by compiling PHP to bytecode faster than traditional PHP processing. It provides benchmarks showing HHVM's performance advantages over PHP-FPM and describes tools like XHProf that can help optimize WordPress sites to take advantage of HHVM's capabilities. While HHVM has risks with poorly coded themes/plugins, its performance gains make it worth considering as an alternative PHP processor.
Presentation from webinar held on August 19th, 2020, with Xdebug developer Derick Rethans and Seravo CEO Otto Kekäläinen.
This presentation shows you how to use Xdebug (which is very easy with the Seravo WordPress development environment!) to make a record of what the WordPress PHP code does during a website page load, and how to use that information to optimize the performance of your WordPress site.
For a video recording and Dericks presentation see https://seravo.com/blog/webinar-xdebug-profile-php/
This book provides an overview of advanced PHP techniques for building professional web applications. It covers topics like improved session management, multiple database interaction, better form processing, file handling, authentication, error handling, and generating dynamic graphics. The book is intended for PHP developers who want to learn more advanced concepts. It uses numerous code examples to illustrate the techniques.
Less and faster – Cache tips for WordPress developersSeravo
Otto Kekäläinen, the code-loving CEO of Seravo held a webinar on May 12, 2020, that focused on the cache: what should a WordPress developer know and which are the best practices to follow?
PHP , Internet Business Marketing , & Good Web Content Go Hand In Handsilpine2
PHP scripts allow websites to dynamically generate content which search engines can read as HTML, unlike JavaScript. Forums and blogs are popular PHP scripts that encourage user participation and daily posts, continuously providing new content for search engines. Implementing PHP scripts like forums and blogs is recommended to take advantage of their ability to automatically generate fresh content.
7 things every web developer should know about linux administrationZareef Ahmed
Linux system administration is specialized field in itself. In this presentation, I am going to list 7 Linux administration tasks which a programmer should know to be with ease while deploying or planning deployment of applications.
Odoo - Open Source CMS: A performance comparisionOdoo
The document compares the performance of four open source content management systems (CMS): Odoo, Drupal, Magento, and Prestashop. It finds that Odoo consistently outperforms the other CMS across a number of metrics: it is 3 times faster than Drupal and 6 times faster than Magento based on load testing; it can handle more users before timing out; and its codebase is smaller. While the other CMS have improvements to make in terms of HTML validation, Odoo represents the best balance of speed, scalability, and maintainability according to the analysis in the document.
- PHP can be used to build enterprise-level applications and integrate with existing enterprise technologies and architectures. While other technologies may be better suited for certain backend tasks, PHP excels at building scalable web applications.
- Common enterprise design patterns around scalability, high availability, and integrity can be applied to PHP implementations. Specific patterns also exist for scaling MySQL databases and leveraging Apache modules like mod_rewrite.
- PHP applications can interface with Java backends using bridges. This allows leveraging the strengths of each technology by using PHP for the frontend and Java for enterprise services.
Migration Best Practices - SMX London 2018Bastian Grimm
Bastian Grimm provides best practices for successfully relaunching a website through migration. He emphasizes thorough documentation, testing, and addressing all technical details. Common problems with migrations include missing or incorrect redirects. Post-migration, it is important to monitor performance, check for errors, and ensure proper indexing of the new site.
Proven ways to improve your website performance optimizing front end and back...Katy Slemon
Looking for proven ways to improve your website performance? Check out performance optimisation tips to enhance the front-end and back-end of your application.
El documento presenta los esquemas de iluminación realizados por un grupo de estudiantes de fotografía, incluyendo fotografías tomadas por tres estudiantes usando diferentes modelos, programas de edición y detalles sobre el proceso como el maquillaje y disfraces.
Este documento presenta esquemas de iluminación para fotografía en blanco y negro y a color tomados de libros sobre iluminación fotográfica. Los esquemas son presentados por un grupo de estudiantes de la Escuela de Arte de Sevilla para su práctica sobre iluminación en el estudio fotográfico.
The document provides an overview of advertising targeted towards children. It discusses where advertisements can be found, different types of advertisements, how advertising works, legislation around children's advertising, and concerns around unhealthy advertising influences. It also describes techniques used in advertising, including using celebrities or "real people", marketing directly to teens, and potentially misleading claims.
Este documento presenta los diferentes tipos de iluminación que se pueden usar en un estudio fotográfico, incluyendo luz de 3/4, luz lateral, luz lateral con relleno, contraluz para silueta y para luz de borde, iluminación cenital, nadir y cruzada. El documento fue creado por Samuel J. Salado y María Gómez como parte de un curso de fotografía.
Este documento presenta esquemas de iluminación para fotografía en blanco y negro y a color tomados de libros sobre iluminación fotográfica. Los esquemas son presentados por un grupo de estudiantes de la Escuela de Arte de Sevilla para su práctica sobre iluminación en el estudio fotográfico.
The document discusses best practices for scalability and performance when developing PHP applications. Some key points include profiling and optimizing early, cooperating between development and operations teams, testing on production-like data, caching frequently accessed data, avoiding overuse of hard-to-scale resources, and using compiler caching and query optimization. Decoupling applications, caching, data federation, and replication are also presented as techniques for improving scalability.
This document summarizes techniques for building scalable websites with Perl, including caching whole pages, chunks of HTML/data, and using job queuing. Caching helps performance by reducing workload and scalability by lowering database load. Large sites like Yahoo cache aggressively. Job queuing prevents overloading resources and keeps websites responsive under high demand by lining requests up in a queue.
Domino server and application performance in the real worlddominion
The document provides tips and strategies for optimizing Domino server performance, with a focus on addressing disk I/O bottlenecks. It recommends separating database files onto different physical disks based on I/O needs, avoiding journaling file systems for transaction logs, optimizing RAID configurations, and addressing inefficient views and design patterns that can degrade performance. Specific issues covered include transaction logging, indexing, database design, and application usage patterns.
To scale PHP web applications:
1) Focus on fundamentals like testable code, efficient data structures and algorithms, and designing for change.
2) Optimize performance through caching, using databases efficiently, and leveraging PHP features.
3) Employ techniques like asynchronous processing, parallel computing, and service-oriented architectures to spread load across servers.
30 Skills to Master to Become a Senior Software EngineerSean Coates
The document discusses 30 skills that software engineers should master to become senior engineers, including skills with programming languages like PHP, databases, SQL, HTML, CSS, JavaScript frameworks, build tools like Gulp, version control with Git, server-side frameworks like Laravel, object-relational mappers, and using database seeding and migrations. It emphasizes the importance of being well-rounded and having experience with both front-end and back-end technologies as well as tools that improve productivity and maintainability. Mastering these skills can lead to higher salaries, more leadership opportunities, and building more robust applications.
NoSQL databases are non-relational databases designed for large volumes of data across many servers. They emerged to address scaling and reliability issues with relational databases. While different technologies, NoSQL databases are designed for distribution without a single point of failure and to sacrifice consistency for availability if needed. Examples include Dynamo, BigTable, Cassandra and CouchDB.
The document discusses scalable web architectures and common patterns for scaling web applications. It covers key topics like load balancing, caching, database replication, and data federation. The overall goal of application architecture is to scale traffic and data while maintaining high availability and performance. Horizontal scaling by adding more servers is preferable to vertical scaling of buying larger servers.
The document discusses scalable web architectures and common patterns for scaling web applications. It covers key topics like load balancing, caching, database replication and sharding, and asynchronous queuing to distribute workloads across multiple servers. The goal of these patterns is to scale traffic, data size, and maintainability through horizontal expansion rather than just vertical upgrades.
The document discusses scalable web architectures and common patterns for scaling web applications. It covers key topics like load balancing, caching, database replication and sharding, and asynchronous queuing to distribute workloads across multiple servers. The goal of these patterns is to scale traffic, data size, and maintainability through horizontal expansion rather than just vertical upgrades.
UnConference for Georgia Southern Computer Science March 31, 2015Christopher Curtin
I presented to the Georgia Southern Computer Science ACM group. Rather than one topic for 90 minutes, I decided to do an UnConference. I presented them a list of 8-9 topics, let them vote on what to talk about, then repeated.
Each presentation was ~8 minutes, (Except Career) and was by no means an attempt to explain the full concept or technology. Only to wake up their interest.
The Guide to becoming a full stack developer in 2018Amit Ashwini
This document provides a guide for becoming a full-stack developer in 2018. It outlines 8 key skills needed: 1) HTML/CSS, 2) JavaScript, 3) a back-end language like Node.js, Ruby, Python, or PHP, 4) databases and web storage, 5) HTTP and REST, 6) web application architecture, 7) Git, and 8) basic algorithms and data structures. For each skill, it provides details on important concepts and tools to learn. The goal is to learn both front-end skills like HTML/CSS and back-end skills like databases, APIs, and server-side programming in order to build complete web applications.
Tips and hits on how to scale your PHP application, from tuning your php.ini settings and using accelerators till going through caching mechanisms, reverse proxying and infrastructure setups.
Matteo Moretti discusses scaling PHP applications. He covers scaling the web server, sessions, database, filesystem, asynchronous tasks, and logging. The key aspects are decoupling services, using caching, moving to external services like Redis, S3, and RabbitMQ, and allowing those services to scale automatically using techniques like auto-scaling. Sharding the database is difficult to implement and should only be done if really needed.
The document provides tips for building a scalable and high-performance website, including using caching, load balancing, and monitoring. It discusses horizontal and vertical scalability, and recommends planning, testing, and version control. Specific techniques mentioned include static content caching, Memcached, and the YSlow performance tool.
Scalable Web Architectures: Common Patterns and Approaches - Web 2.0 Expo NYCCal Henderson
The document discusses common patterns and approaches for scaling web architectures. It covers topics like load balancing, caching, database scaling through replication and sharding, high availability, and storing large files across multiple servers and data centers. The overall goal is to discuss how to architect systems that can scale horizontally to handle increasing traffic and data sizes.
Presentation from June 2013, Surrey, BC, Drupal Group meetup.
- Some tips how to improve Drupal 7 performance.
- Get Drupal 7 working faster
- Optimize code in order to get proper responses
- Use cache (memcache, APC cache, entity cache, varnish)
- Scale Drupal horizontally in order to balance load
Scalable Web Architectures - Common Patterns & ApproachesCal Henderson
The document discusses scalable web architectures and common patterns for scaling different parts of a web application. It covers scaling app servers horizontally by avoiding sessions or using centralized sessions. For databases, it recommends replication, caching, and data federation. Static content can be served from a reverse proxy cache cluster. Storing static files requires horizontal scaling across multiple volumes and hosts.
The document discusses scalable web architectures and common patterns for scaling different parts of a web application. It covers scaling app servers horizontally by using centralized or no sessions. It also discusses scaling databases through replication, caching, and data federation across multiple clusters. Serving static files can be scaled using a reverse proxy cache cluster. Storing static files involves using multiple storage volumes.
Redis and Bloom Filters - Atlanta Java Users Group 9/2014Christopher Curtin
This document discusses using Redis to enable failing fast with Bloom filters. It provides an overview of Redis as a data structure server and key-value cache, as well as Bloom filters as a space-efficient probabilistic data structure for membership testing. By storing Bloom filters in Redis, they can be made updatable and persistent while avoiding the high costs of updating and querying large Bloom filters stored in databases. Examples are given where Redis-backed Bloom filters can be used to optimize queries and decide whether expensive operations need to be performed.
ZF2 Modules: Events, Services, and of course, modularityJohn Coggeshall
A presentation I gave at php[world], 2015 in Washington, DC on Zend Framework 2 focusing on the EventManager, ServiceManager, and how to build dependent-free modules for your applications
The document discusses using Vagrant and Puppet to create virtual machine environments for development. Vagrant allows defining and provisioning VMs through a Vagrantfile, while Puppet can further configure the VMs by installing software and configuring settings. Benefits include keeping development environments isolated, easy setup for new developers, and ability to deploy VMs to cloud providers like AWS. The key steps are downloading Vagrant and VirtualBox, defining the Vagrantfile, writing Puppet manifests, and running vagrant up to launch and provision the VM.
The document is an introduction to the Zend Framework 2 (ZF2) architecture. It discusses key ZF2 concepts like modules, the model-view-controller pattern, routes, controllers, and the service manager. Modules are a core concept, with everything including applications being modules. The service manager handles application dependencies and allows for decoupled development. Routes map URLs to controllers and actions. Controllers are executed from dispatched routes and return responses or view models.
John Coggeshall has 18 years of experience in web development and PHP. He discusses several projects that failed due to neglecting technical debt, overcomplicating projects, and ignoring expert advice. Some key lessons are to have expert skills as partners rather than employees, manage expectations, be flexible, have a development process, and keep things simple.
The rise of virtualization has transformed the server business, but other than that it seems like the developer world has largely been left behind. Regardless of if you are working on one project, or have 20 clients, every developer should know how to use virtualization to create seamless and easy to manage development environments. In this talk we will take a practical approach to using a combination of Puppet, Vagrant, and VirtualBox to create entire development environments in a matter of moments - and even better re-use that template for any project you have in the future in a version-controlled and easily managed manner. Bringing on a new developer for your project? We'll show you how they can get a full-fledged development environment from zero to working in under 10 minutes.
My talk given at Confoo, 2011 in Montreal, Quebec on using the Puppet client/server deployment tool for complex web application deployments. This is an introduction talk, and introduces everything you'll need to get started.
This is a talk I gave at PHP Quebec 2009 on building Android applications with PHP back-ends. Posted for completeness, the majority of this talk was buried in Android/Java and PHP code.. That said, there are still some useful things in the slides themselves to share.
The document discusses building rich internet applications (RIAs) using Adobe Flex and AIR with a PHP/Zend Framework backend. It describes a project to modernize a legacy DOS-based dealer management system (DMS) by creating an internet-based version that provides data sharing and analytics capabilities. Flex and AIR were chosen for the user interface to provide a desktop-like experience, while PHP/Zend Framework handles the backend functionality. Challenges included a lack of server push capabilities and no hardware support in AIR. These issues were addressed through custom data transfer code and a Java server (Merapi) that could communicate with hardware devices.
A brief keynote I gave at PHP Quebec regarding the shift away from the browser for applications and the potential impacts it will have on our development needs as an industry
These are the slides from my ZendCon 2007 talk on a project we did in Professional Services to basically rebuild from scratch InTicketing's (TicketMaster competitor) e-commerce engine using Zend technologies. It was very well received (not even standing room) and well worth a look!
The document provides an introduction to PHP security basics. It discusses identifying principals (the targets of attackers like private data), understanding common attack vectors like SQL injection and cross-site scripting, and employing defense in depth with overlapping security tactics to protect against multiple attack vectors. The presentation emphasizes understanding what information an attacker could derive from an application in order to better protect principal data and functions.
A three hour tutorial I gave at PHP Quebec on the challenges, theory, and concepts behind making asynchronous JavaScript calls for Web 2.0 Applications using PHP
UiPath Community Day Kraków: Devs4Devs ConferenceUiPathCommunity
We are honored to launch and host this event for our UiPath Polish Community, with the help of our partners - Proservartner!
We certainly hope we have managed to spike your interest in the subjects to be presented and the incredible networking opportunities at hand, too!
Check out our proposed agenda below 👇👇
08:30 ☕ Welcome coffee (30')
09:00 Opening note/ Intro to UiPath Community (10')
Cristina Vidu, Global Manager, Marketing Community @UiPath
Dawid Kot, Digital Transformation Lead @Proservartner
09:10 Cloud migration - Proservartner & DOVISTA case study (30')
Marcin Drozdowski, Automation CoE Manager @DOVISTA
Pawel Kamiński, RPA developer @DOVISTA
Mikolaj Zielinski, UiPath MVP, Senior Solutions Engineer @Proservartner
09:40 From bottlenecks to breakthroughs: Citizen Development in action (25')
Pawel Poplawski, Director, Improvement and Automation @McCormick & Company
Michał Cieślak, Senior Manager, Automation Programs @McCormick & Company
10:05 Next-level bots: API integration in UiPath Studio (30')
Mikolaj Zielinski, UiPath MVP, Senior Solutions Engineer @Proservartner
10:35 ☕ Coffee Break (15')
10:50 Document Understanding with my RPA Companion (45')
Ewa Gruszka, Enterprise Sales Specialist, AI & ML @UiPath
11:35 Power up your Robots: GenAI and GPT in REFramework (45')
Krzysztof Karaszewski, Global RPA Product Manager
12:20 🍕 Lunch Break (1hr)
13:20 From Concept to Quality: UiPath Test Suite for AI-powered Knowledge Bots (30')
Kamil Miśko, UiPath MVP, Senior RPA Developer @Zurich Insurance
13:50 Communications Mining - focus on AI capabilities (30')
Thomasz Wierzbicki, Business Analyst @Office Samurai
14:20 Polish MVP panel: Insights on MVP award achievements and career profiling
Coordinate Systems in FME 101 - Webinar SlidesSafe Software
If you’ve ever had to analyze a map or GPS data, chances are you’ve encountered and even worked with coordinate systems. As historical data continually updates through GPS, understanding coordinate systems is increasingly crucial. However, not everyone knows why they exist or how to effectively use them for data-driven insights.
During this webinar, you’ll learn exactly what coordinate systems are and how you can use FME to maintain and transform your data’s coordinate systems in an easy-to-digest way, accurately representing the geographical space that it exists within. During this webinar, you will have the chance to:
- Enhance Your Understanding: Gain a clear overview of what coordinate systems are and their value
- Learn Practical Applications: Why we need datams and projections, plus units between coordinate systems
- Maximize with FME: Understand how FME handles coordinate systems, including a brief summary of the 3 main reprojectors
- Custom Coordinate Systems: Learn how to work with FME and coordinate systems beyond what is natively supported
- Look Ahead: Gain insights into where FME is headed with coordinate systems in the future
Don’t miss the opportunity to improve the value you receive from your coordinate system data, ultimately allowing you to streamline your data analysis and maximize your time. See you there!
Scaling Connections in PostgreSQL Postgres Bangalore(PGBLR) Meetup-2 - MydbopsMydbops
This presentation, delivered at the Postgres Bangalore (PGBLR) Meetup-2 on June 29th, 2024, dives deep into connection pooling for PostgreSQL databases. Aakash M, a PostgreSQL Tech Lead at Mydbops, explores the challenges of managing numerous connections and explains how connection pooling optimizes performance and resource utilization.
Key Takeaways:
* Understand why connection pooling is essential for high-traffic applications
* Explore various connection poolers available for PostgreSQL, including pgbouncer
* Learn the configuration options and functionalities of pgbouncer
* Discover best practices for monitoring and troubleshooting connection pooling setups
* Gain insights into real-world use cases and considerations for production environments
This presentation is ideal for:
* Database administrators (DBAs)
* Developers working with PostgreSQL
* DevOps engineers
* Anyone interested in optimizing PostgreSQL performance
Contact info@mydbops.com for PostgreSQL Managed, Consulting and Remote DBA Services
Quality Patents: Patents That Stand the Test of TimeAurora Consulting
Is your patent a vanity piece of paper for your office wall? Or is it a reliable, defendable, assertable, property right? The difference is often quality.
Is your patent simply a transactional cost and a large pile of legal bills for your startup? Or is it a leverageable asset worthy of attracting precious investment dollars, worth its cost in multiples of valuation? The difference is often quality.
Is your patent application only good enough to get through the examination process? Or has it been crafted to stand the tests of time and varied audiences if you later need to assert that document against an infringer, find yourself litigating with it in an Article 3 Court at the hands of a judge and jury, God forbid, end up having to defend its validity at the PTAB, or even needing to use it to block pirated imports at the International Trade Commission? The difference is often quality.
Quality will be our focus for a good chunk of the remainder of this season. What goes into a quality patent, and where possible, how do you get it without breaking the bank?
** Episode Overview **
In this first episode of our quality series, Kristen Hansen and the panel discuss:
⦿ What do we mean when we say patent quality?
⦿ Why is patent quality important?
⦿ How to balance quality and budget
⦿ The importance of searching, continuations, and draftsperson domain expertise
⦿ Very practical tips, tricks, examples, and Kristen’s Musts for drafting quality applications
https://www.aurorapatents.com/patently-strategic-podcast.html
Understanding Insider Security Threats: Types, Examples, Effects, and Mitigat...Bert Blevins
Today’s digitally connected world presents a wide range of security challenges for enterprises. Insider security threats are particularly noteworthy because they have the potential to cause significant harm. Unlike external threats, insider risks originate from within the company, making them more subtle and challenging to identify. This blog aims to provide a comprehensive understanding of insider security threats, including their types, examples, effects, and mitigation techniques.
An invited talk given by Mark Billinghurst on Research Directions for Cross Reality Interfaces. This was given on July 2nd 2024 as part of the 2024 Summer School on Cross Reality in Hagenberg, Austria (July 1st - 7th)
Quantum Communications Q&A with Gemini LLM. These are based on Shannon's Noisy channel Theorem and offers how the classical theory applies to the quantum world.
Kief Morris rethinks the infrastructure code delivery lifecycle, advocating for a shift towards composable infrastructure systems. We should shift to designing around deployable components rather than code modules, use more useful levels of abstraction, and drive design and deployment from applications rather than bottom-up, monolithic architecture and delivery.
Support en anglais diffusé lors de l'événement 100% IA organisé dans les locaux parisiens d'Iguane Solutions, le mardi 2 juillet 2024 :
- Présentation de notre plateforme IA plug and play : ses fonctionnalités avancées, telles que son interface utilisateur intuitive, son copilot puissant et des outils de monitoring performants.
- REX client : Cyril Janssens, CTO d’ easybourse, partage son expérience d’utilisation de notre plateforme IA plug & play.
RPA In Healthcare Benefits, Use Case, Trend And Challenges 2024.pptxSynapseIndia
Your comprehensive guide to RPA in healthcare for 2024. Explore the benefits, use cases, and emerging trends of robotic process automation. Understand the challenges and prepare for the future of healthcare automation
How RPA Help in the Transportation and Logistics Industry.pptxSynapseIndia
Revolutionize your transportation processes with our cutting-edge RPA software. Automate repetitive tasks, reduce costs, and enhance efficiency in the logistics sector with our advanced solutions.
論文紹介:A Systematic Survey of Prompt Engineering on Vision-Language Foundation ...Toru Tamaki
Jindong Gu, Zhen Han, Shuo Chen, Ahmad Beirami, Bailan He, Gengyuan Zhang, Ruotong Liao, Yao Qin, Volker Tresp, Philip Torr "A Systematic Survey of Prompt Engineering on Vision-Language Foundation Models" arXiv2023
https://arxiv.org/abs/2307.12980
The DealBook is our annual overview of the Ukrainian tech investment industry. This edition comprehensively covers the full year 2023 and the first deals of 2024.
How Social Media Hackers Help You to See Your Wife's Message.pdfHackersList
In the modern digital era, social media platforms have become integral to our daily lives. These platforms, including Facebook, Instagram, WhatsApp, and Snapchat, offer countless ways to connect, share, and communicate.
Best Programming Language for Civil EngineersAwais Yaseen
The integration of programming into civil engineering is transforming the industry. We can design complex infrastructure projects and analyse large datasets. Imagine revolutionizing the way we build our cities and infrastructure, all by the power of coding. Programming skills are no longer just a bonus—they’re a game changer in this era.
Technology is revolutionizing civil engineering by integrating advanced tools and techniques. Programming allows for the automation of repetitive tasks, enhancing the accuracy of designs, simulations, and analyses. With the advent of artificial intelligence and machine learning, engineers can now predict structural behaviors under various conditions, optimize material usage, and improve project planning.
2. Welcome! Who am I: John Coggeshall Chief Technology Officer, Automotive Computer Services Author PHP 5 Unleashed Speaker on PHP-related topics worldwide Geek
3. What is Scalability? Define: Scalability The ability and flexibility of an application to meet growth requirements of an organization More then making a site go fast(er) Scalability in human resources, for example The “fastest” approach isn’t always the most scalable OO is slower, but more scalable from a code maintenance and reuse standpoint Failure to consider future needs during architectural stages leading to failure of the application’s API to scale
4. # The secret to scalability is the ability to design, code, and maintain your applications using the same process again and again regardless of size
7. You have to plan Performance and resource scalability requires forethought and process Version Control Performance Goals Metric measuring Development Mailing Lists API documentation Awareness is key Think about these problems and how you will solve them as your project gets off the ground
8. Designing without Scalability If your application does not perform it will likely not succeed What does it mean to perform? 10 requests/sec? 100 requests/sec? 1000 requests/sec? If you don’t know what it will take to meet your performance requirements, you probably won’t meet them. At its worst, you'll be faced with a memorable and sometimes job-ending quote: 'This will never work. You're going to have to start all over.’
9. Performance Metrics Response Time How long does it take for the server to respond to the request? Resource usage CPU, memory, disk I/O, Network I/O Throughput Requests / second Probably the most useful number to keep track of
10. Proactive vs. Reactive Common Scenario: Reactive Write your app Deploy it Watch it blow up Try to fix it If you’re lucky, you might succeed “enough” If you’re unlucky….. Correct Approach: Proactive Know your performance goals up front and make sure your application is living up to them as part of the development process
11. Everyone has a role in Performance Architects: Balance performance against other application needs Interoperability Security Maintainability Developers: You need to know how to measure and how to optimize to meet the goals Web-stress tools, profilers, etc.
12. Designing with Scalability When designing your application, you should assume it needs to scale Quick and dirty prototypes often are exactly what gets to production It’s easy to make sure your applications have a decent chance of scaling MySQL: Design assuming someday you’ll need master/server replication, for example
13. Designing with Scalability Don’t write an application you’ll need three years from now, write an application you need today Just think about what you might need in three years
15. Network file systems Problem: We have a server farm of 10 servers and we need to deploy our code base Very common problem Many people look to a technology like NFS At least 90% of the time, this is a bad idea NFS/GFS is really slow NFS/GFS has tons of locking issues
16. Network file systems So how do we deploy our code base? You should always deploy your code base locally on the machine serving it Rsync is your friend What about run-time updates? Accepting File uploads Need to be available to all servers simultaneously Solutions vary depending on needs NFS may be an option for this small portion of the site Database is also an option
17. I/O Buffers I/O Buffers are there for a reason, to make things faster Sending 4098 bytes of data to the user when your system write blocks are 4096 bytes is stupid In PHP you can solve this using output buffering At the system level you can also boost up your TCP buffer size Almost always a good idea, most distributions are very conservative here Just be mindful of the amount of RAM you actually have
18. Ram Disks Ram Disks are a very nice way to improve performance of an application, as long as you have a lot of memory laying around Use Ramdisks to store any sort of data you wouldn’t care if you lost when the 16 year old trips over the power cable A reasonable alternative to shared memory
19. Bandwidth Optimization You can optimize bandwidth in a few ways Compression mod_deflate Zlib.output_compression=1 (PHP) Content Reduction via Tidy: <?php $o = array("clean" => true, "drop-proprietary-attributes" => true, "drop-font-tags" => true, "drop-empty-paras" => true, "hide-comments" => true, "join-classes" => true, "join-styles" => true); $tidy = tidy_parse_file("php.html", $o); tidy_clean_repair($tidy); echo $tidy; ?>
20. Configuring PHP for Speed register_globals = off auto_globals_jit = on magic_quotes_gpc = off expose_php = off register_argc_argv = off always_populate_raw_post_data = off session.use_trans_sid = off session.auto_start = off session.gc_divisor = 10000 output_buffering = 4096
21. Blocking calls Blocking I/O can always be a problem in an application I.e. attempting to open a remote URL from within your PHP scripts If the resource is locked / slow / unavailable your script hangs while we wait for a timeout Might as well try to scale an application that has a sleep(30) in it Very bad
22. Blocking calls Solutions Don’t use blocking calls in your application Don’t use blocking calls in the heavy-load aspects of your application Have out-of-process scripts responsible for pulling down data
23. Failing to Cache Caching is one of the most important things you can do when writing a scalable application A lot of people don’t realize how much they can cache Rarely is a 5 second cache of any data going to affect user experience Yet it will have significant performance impact 1 page load / 2 queries per request 2 queries * 200 request / sec = 400 queries / second 400 queries * 5 seconds = 2000 queries you didn’t do
24. Failing to Cache Improving the speed of PHP can be done very easily using an op-code cache PHP 6 will have this ability built-in to the engine
25. Semi-Static Caching If you're web application has a lot of semi-static content Content that could change so it has to be stored in the DB, but almost never does .. And you're running on Apache This Design Pattern is killer!
26. Semi-Static Caching Most people in PHP would implement a page like this: http://www.example.com/show_article.php?id=5 This would be responsible for generating the semi-static page HTML for the browser
27. Semi-Static Caching Instead of generating the HTML for the browser, make this script generate another PHP script that contains mostly static content Keep things like personalization code, but make the actual article itself static in the file Write the file to disk in a public folder under document root
28. Semi-Static Caching If you put them in this directory http://www.example.com/articles/5.php You can create a mod_rewrite rule such that http://www.example.com/articles/5.php maps to http://www.example.com/show_article.php?id=5 Since show_article.php writes articles to files, once it's been generated no more DB reads!
29. Semi-Static Caching Simple and Elegant Solution Allows you to keep pages “personalized” Very easy to Maintain #
30. Poor database design Database design is almost always the most important thing in your application PHP can be used completely properly, but if you mess up the database you’re hosed anyway Take the time to really think about your design Read books on designing relational databases Understand how Indexes work, and use them How Much Data?
31. Poor database design For example.. Using MySQL MyISAM tables all the time Use InnoDB instead if you can Use MyISAM tables only if you plan on doing fulltext searching Even then, they shouldn’t be primary tables
32. Improperly dealing with database connections Improperly using persistent database connections Know your database, MySQL has a relatively light handshake process compared to Oracle Using PHP to deal with database fail over It’s not PHP’s Job, don’t do it.
33. Let me say that again.. I DO NOT CARE WHAT IT SAYS IN SOME BOOK, DO NOT USE PHP TO DETERMINE WHICH DATABASE TO CONNECT TO
34. Database connections Bad: Code to determine if it is the dev environment or not and a different database is selected in each case Suicidal: Code to determine if the primary master in a MySQL database is down, and instead attempt to seamlessly roll-over to a hot swap MySQL slave you bless as master GOOD: MySQL Proxy
35. Having your Cake and Eating it too For those of us using MySQL, here’s a great replication trick from our friends at Flickr InnoDB is under most circumstances considerably faster then MyISAM MyISAM is considerably better suited for full-text searches Trick: During a master/slave replication, the slave table type can change Set up a separate MyISAM fulltext search farm Connect to those servers when performing full-text searches
36.
37. SQLite, Huh? SQLite is a great database package for PHP that can really speed certain things up Requires you understanding when and how to use it. SQLite is basically a flat-file embedded database Crazy-fast reads, horrible writes (full database locks) Answer: SQLite is a great lookup database
38. Keepalive Requests Keepalive sounds great on paper It can actually totally hose you if you aren’t careful Use Keepalive if: You use the same server for static/dynamic content You intelligently know how to set the timeout No Keepalive request should last more then 10 seconds If Apache is 100% Dynamic Turn it off
39. Knowing where to Not optimize Sooner or later, you (likely) will worry about optimization Hopefully, you didn’t start after your application started blowing up (aka Twitter) When trying to make scalability decisions knowledge is the most important thing you can have
40. Knowing where to Not optimize PHP has both closed source and open source profilers which do an excellent job of identifying the bottlenecks in your application vmstat, iostat are your friends Optimize where it counts
41. Instrumentation of your applications is key to determining what matters most when optimizing If you’re not logging, you’re shooting in the dark White-box monitoring of your applications via tools like Zend Platform are enormously helpful in understanding what is going on You can’t make good process (or business) decisions unless you understand how your web site is being used and by whom . Knowing where to Not optimize
42. Amdahl’s Law: Improving code execution time by 50% when the code executes only 2% of the time will result in a 1% overall improvement Improving code execution time by 10% when the code executes 80% of the time will result in a 8% overall improvement Knowing where to Not optimize
43. Use Profilers Profilers are easy to use Profilers draw pretty pictures Profilers are good Use profilers
44. How a Profiler/Debugger works in PHP Profiler / Debuggers in PHP work remotely against the web server
45. Tips on using a profiler When doing real performance analysis, here are a few tips to help you out: Copy the raw data (function execution times) into a spreadsheet and do analysis from there Most profilers provide at least two execution figures per function call The amount of time spent executing PHP code The amount of time PHP spent internally That means total = A + B If you are spending a lot more time inside of PHP, you’ve got a blocking issue somewhere
46. Something More.. Do not mistake something more for something better Dev: “Hey, let’s build this great ORM that automatically generates it’s views like Ruby!” Manager: “Sounds great, go to it” <4 months pass> Dev: “Here’s my two weeks notice, I quit” Manager: “Okay John you write it” John: “Um, I have no idea what this guy did” <2 months pass to re-write the module in a way that we can maintain it>
47. Something More.. Don’t use a sledge hammer when a tack hammer will do Devs: Just because your boss doesn’t know the difference doesn’t make it a good idea It might seem like great job security to write code only you can maintain, but in reality all it will do is get you fired faster when they figure it out Managers: Know enough about the technologies to keep eager developers from leaving you holding the bag.
48. Final Thoughts # Ultimately the secret of scalability is developing applications and procedures which scale both UP AND DOWN You have to be able to afford to make the application to begin with You have to be able to afford to make the application ten times bigger then it is Without process, you will fail. REMEMBER: In ANY application, there is only ever one bottleneck Questions?