Top 30 Scalability Mistakes

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.

The document provides an overview of key performance sanity checks for SharePoint, including 7 steps to check SharePoint health, how to analyze SharePoint usage, and how to identify slow pages. It discusses checking end user health, site health, system health, IIS health, AppPool health, SQL and service health, and web parts. The document also covers avoiding common deployment mistakes and provides a real-life example of troubleshooting a slow page load for a frustrated user.

You're woken up in the middle of the night to your phone. Your app is down and you're on call to fix it. Eventually you track it down to "something with the db," but what exactly is wrong? And of course, you're sure that nothing changed recently… Knowing what to fix, and even where to start looking, is a skill that takes a long time to develop. Especially since Postgres normally works very well for months at a time, not letting you get practice! In this talk, I'll share not only the more common failure cases and how to fix them, but also a general approach to efficiently figuring out what's wrong in the first place.

This document summarizes a presentation about troubleshooting Postgres performance problems. It discusses how to determine if the issue is with the database, system resources, or the application. It provides examples of common problems like running out of CPU, memory, disk, or parallelism. It also recommends tools to diagnose issues like perf, gdb, iostat, iotop, htop, bwm-ng, and pg_stat_statements. Finally, it discusses setting boundaries around economics, workload, performance, and errors to avoid instability.

The document discusses non-blocking Python web servers. It begins by explaining that blocking web servers, like those using Django, require clients to wait online for a response, whereas non-blocking servers like Tornado can handle multiple requests concurrently using an event loop. It then provides examples of implementing non-blocking behavior using callbacks, coroutines, and yield statements in Tornado. Finally, it emphasizes thinking beyond just coding and algorithms to consider blocking vs non-blocking behavior across the full stack, and provides Motor as a non-blocking MongoDB driver.

This document discusses using Fiddler, a web debugging proxy, to debug HTTP traffic and tune proxy settings. It highlights how Fiddler scripts allow setting breakpoints to inspect JavaScript files from multiple hosts to find the source of unwanted content, and how Fiddler can be used to download malware signatures and lists of dynamic DNS domains for analysis.

The document discusses various techniques for caching websites to improve performance. It covers full page caching plugins like WP Super Cache and W3 Total Cache. It also discusses ways to optimize web servers like Apache and Nginx, speed up PHP parsing, use memcache for generic data storage, implement opcode caching, and do fragment caching. The goal of these caching techniques is to serve cached static content instead of dynamically generating pages each time to improve load times and server efficiency.

This document provides tips and rules for learning Joomla CMS in a weekend for programmers. It discusses choosing the right development environment like PHPStorm, understanding Joomla architecture by reviewing core extensions, keeping projects simple, and seeking advice from expert communities. Resources recommended include the Component Creator tool, books on Joomla programming, and video tutorials for building basic extensions. The document aims to help new developers get started quickly with Joomla.

The document discusses the speaker becoming the maintainer of the Python WebOb library. Some key points: - The speaker was given commit access to WebOb and added as the maintainer on PyPI after contributing fixes and being active on IRC. - As maintainer, the speaker had ideas to improve the code but quickly learned that even small changes can break dependencies, requiring care around backwards compatibility. - It is important to consider existing users and set deprecation policies before making changes. The speaker advocates refactoring code over time rather than rewriting. - Being a maintainer involves being a gatekeeper for standards while growing the community and finding the next generation of contributors.

The document discusses various Platform as a Service (PaaS) technologies including Amazon Web Services, Google App Engine, and Microsoft Live Mesh. It notes that these services allow developers to avoid maintaining their own infrastructure and focus on their applications instead. The document also covers JavaFX, a new platform from Sun Microsystems that aims to enable rich user experiences across devices using Java technologies.

ColdFusion Summit 2016 was announced as an event for everyone except Chad, who was not invited due to prior actions. The document then discussed accessibility requirements and how to meet them using ColdFusion. It noted the importance of compliance and ensuring software is available to all. Examples were given of inaccessible software like Dwarf Fortress and how ARIA attributes can help. The challenges of getting developers to comply were addressed by discussing how one company created their own Markup Language (MCML) of custom tags to enforce standards and ensure 508 compliance. They achieved full compliance over time through this framework and using interns to update code. Testing and responsibilities were also emphasized.

Part of the SPBiz Conference, a real-world look at some basic and complex SharePoint scenarios that did not go so well. However, each issue has a solution or an alternate method to resolve it. In this presentation, we follow a six step process to analyze, solve and prevent SharePoint issues & "debacles".

This document discusses best practices for open source projects and frameworks, including being respectful of all community members, having high-quality documentation, following semantic versioning, being transparent about releases and security fixes, and providing migration guides for breaking changes. It also recommends having opinions but flexibility in code generation and conventions, future-proofing APIs, and learning from mistakes in an open and rewarding process.

Voor het maken van single page web applications lijkt MVC met databinding de standaard. Daarmee zijn fouten lastig te achterhalen. Facebook ondervond dat ook en koos voor een functionele aanpak: ReactJS. Deze sessie geeft een introductie, gaat dieper in op ogenschijnlijke snelheid nadelen en laat zien hoe je herbruikbare React componenten bouwt. Tevens zal ASP.NET MVC gebruikt worden voor server side rendering van de initiële state, ideaal voor search engines die meestal een probleem hebben met single page apps. Na deze sessie zul je nooit meer hetzelfde denken over web UI’s.

5 ways to remove dependencies and improve scalability Presented at Agile Holland Meetup in Rotterdam and CD conference in Bussum

The document discusses corporate governance and accountability. It provides an overview of a lecture on this topic, including a discussion on governance and accountability, corporate social responsibility and accounting, and a case presentation on AIG. The lecture aims to critically review studies on the impact of corporate social responsibility on firm value. It also describes CSR indices and evaluates their usefulness.

This document summarizes a presentation on analyzing the scalability of a Media Aware Network Element (MANE). The MANE acts as an edge router to identify media traffic and enforce service level agreements. It was implemented using Click modular router on Linux with minimal overhead. Experiments showed forwarding performance was similar to standard Linux while supporting quality of service policies. Future work includes improving classification and multicast support to further optimize scalability.

The document provides an overview of workflow management systems and introduces the Workflow Management Coalition's Workflow Reference Model. It defines key terms like workflow, workflow management systems, and process definition. It describes the main functions of workflow systems as build-time functions to define processes, and run-time functions to control process instances and enable interaction with users and applications. The reference model identifies potential areas for standardization, including process definitions and application programming interfaces, to enable interoperability between heterogeneous workflow products and integration with other IT services.

@ 1st training workshop on workplace radioactive materials safety and security, Suez canal university, 22-6 November 2014 content Introduction • Hazard • Illicit trafficking • Weapon of mass disruptive • Accountability

This document discusses the accountability problem with machine learning algorithms. It notes that there are two types of algorithms - those explicitly coded and those that learn statistical patterns in data. These latter types can be difficult to assess and shift the focus from normative values to empirical patterns in data. It also discusses how algorithms can learn sensitive personal attributes from innocuous Facebook likes and how risk algorithms associate many data points with loan default risk. The document argues that accountability is not enough and that regulation will need to be domain-specific while exploring approaches like consumer protections and data restrictions. It concludes that algorithms reflect societal structures and turning this into profit always raises normative issues requiring attention to commercial influences and consideration of more egalitarian alternatives.

This document discusses key considerations for implementing a successful sales promotion campaign, including: 1) Estimating budgets by calculating opportunity to apply (OTA), redemption rates, and costs per pack. Getting the budget wrong can be risky. 2) Developing a structured planning process using SOSTAC (Situation, Objectives, Strategy, Tactics, Action, Control) to set KPIs, potential solutions, and operational plans. 3) Understanding important legal aspects like the UK Advertising Codes, ensuring promotions are legal, decent, honest and don't mislead or take advantage of children. Regulations vary significantly in other countries.

This document discusses management control systems. It covers control processes that monitor activities to ensure they are accomplished as planned and correct deviations. It also discusses approaches to control like market, bureaucratic and clan systems. Types of control involve measuring actual performance against standards. Categories of control systems include diagnostic, boundary and personal/interactive controls.

The document discusses balancing the workload between two production lines - an assembly line and a testing/packaging line - for two digital imaging printer models, DI-910 and DI-950. It notes that the DI-910 takes 3 minutes for assembly but 4 minutes for testing, while the DI-950 takes 6 minutes for assembly but only 2 minutes for testing. The optimal solution is to produce 80 units of the DI-950 per day to balance the 480 total minutes of available time between the two lines.

Operations Research Case study workload balancing production strategy hart venture capital product mix investment strategy project

The document proposes a new workflow process to improve team effectiveness at a forensic hospital. It identifies issues with the current process such as lack of communication, documentation, and oversight. The proposed process establishes a small governance committee and scorecard system to provide clear ownership, transparency, and continuous process improvement. It includes deployment timelines and templates to standardize documentation and reduce duplication when implementing the new workflow.

Distributed systems use multiple computers that interact over a network to achieve common goals like scalability and high availability. They work to handle increasing loads by either scaling up individual nodes or scaling out by adding more nodes. However, distributed systems face challenges in maintaining consistency, availability, and partition tolerance as defined by the CAP theorem. Techniques like caching, queues, logging, and understanding failure modes can help address these challenges.

A final objective for sales promotion is to enhance or support the integrated marketing communications effort for a brand or company. While building or maintaining brand equity was traditionally viewed as something that was done through media advertising, it has also become an important goal for marketers as they develop their sales promotion programs.

A very successful talk where in I discuss the top 10 failures of organizations I have personally experienced when trying to scale. More than just performance!

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.

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.

Zend Platform provides tools to help PHP applications scale. It includes PHP Intelligence for application monitoring, performance features like job queues and caching, and session clustering to share session data across multiple servers. It offers comprehensive and integrated solutions to common problems in scaling PHP applications.

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.

Tony Bibbs presented on frameworks for PHP development. He discussed when frameworks should and should not be used, common risks of frameworks, and typical framework components like MVC, ORM, templates. His key recommendation was to only change one component of a framework at a time through incremental improvements.

A talk given early in 2003 by William Grosso at CSU Sonoma. At the end of 2008, it stands up remarkably well.

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.

The document discusses the pros and cons of using open source software in projects. It notes that open source code comes with various licenses like GPL, BSD, and MIT that differ in how they can be used. While open source lacks perceived accountability, it actually has governance structures. The document aims to provide context on open source licensing and use within the scope of incorporating external code into a project. It addresses common concerns about open source like licensing complexity but clarifies the intent is to protect author rights, not hinder code use.

Are you looking for a top web app development company in Minneapolis, USA? Zimble Code has an experienced team that can help.

The only way to scale your PHP application is horizontally? If you believe that then you could be missing a huge opportunity. This talk will layout why scaling vertically with the Power System platform can be a superior alternative to a traditional LAMP stack. With simplify development, reduce operation costs and a true enterprise quality database

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.

Aspect oriented programming (AOP) allows developers to separate cross-cutting concerns from the main application code. This helps keep code organized and focused on single responsibilities. AOP works by defining points in the program execution, called join points, where additional behavior can be inserted. This additional behavior is defined through advice that runs before, after, or around join points. Pointcuts are used to identify which join points specific advice should apply to. Aspects group advice and pointcuts to encapsulate a concern.

Richard Tibbetts, CTO, StreamBase Systems. StreamSQL EventFlow is one of the most popular languages for Complex Event Processing (CEP), a data management paradigm for real-time applications. Based on a stream-relational data model common to other CEP languages, EventFlow is unique in that it is a visual language. This talk will focus on the design of visual representations for key features including event dispatch, modularity, data parallelism, polymorphism, and dependency injection, and on the co-development of an Eclipse-based IDE along with a new programming language. StreamSQL EventFlow is the primary programming language for the StreamBase Event Processing Platform. Complex Event Processing platforms are used to process large volumes of event-oriented data in real-time, often in latency-critical applications such as securities trading. Combining clustering, messaging, queuing, data storage, and application logic into one system minimizes latency and gives the programmer control over all aspects of the application. StreamSQL EventFlow is an executable visual language for building CEP applications, unlike visual environments designed for non-developers, or architecture-focused modeling tools. The talk will cover experiences overcoming prejudice against visual programming languages, and how critical development tools are to that process. We will also discuss some details of the implementation including the compiler, a visual debugger, and diff/merge functionality.

This document summarizes a presentation about PHP development best practices including deployment strategies, unit testing, and techniques for building scalable applications. The presentation discusses using PEAR, OS packages, source control, or rsync for deployment. It also covers writing unit tests, characteristics of queueing and scalable computing, and considerations for building applications that can scale. The presenter encourages attending ZendCon to learn more about these topics.

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.

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.

You were just handed the keys to a new repo. Your first glance over the code base causes the fearful “LEGACY” word to ring in your head. HAVE NO FEAR! I’ll share the techniques I’ve learned after working on several legacy codebases to help update that old code to the current PHP generation. We’ll cover triaging the old code base, writing tests to make sure you don’t break anything, and how to modernize your old code base!

You were just handed the keys to a new repo. Your first glance over the code base causes the fearful "LEGACY" word to ring in your head. HAVE NO FEAR! I'll share the techniques I've learned after working on several legacy codebases to help update that old code to the current PHP generation. We'll cover triaging the old code base, writing tests to make sure you don't break anything, and how to modernize your old code base!

This presentation is about System administration with automation , it includes information about System administration and how automation can be used to progress and become efficient without human assistance.

My Virtualization for Developers talk utilizing Vagrant, puppet and VirtualBox to create powerful self-contained development environments.

My Migrating to PHP 7 talk given most recently at the International PHP Conference 2016 in Berlin, Germany

PHP 7 is slated to be released in the Fall of 2015. In this talk I walk you through the highlights of what is new in the next major release.

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

My talk given at OSCON 2014 on developing Google Glass applications in PHP using Phass -- a free open source platform for Google Glass.

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.

A talk I gave at Day Camp for Developers (DC4D) on using Vagrant to create automated virtualized environments for development.