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.
Why Pay for Performance When You Can Lead the World To Your Door for Free?
This document provides an overview of 15 proven SEO tactics and their impact, implementation costs, and potential results. The tactics include writing descriptive titles and meta descriptions, optimizing mobile pages, displaying video thumbnails, optimizing images and videos, finding keyword opportunities, rewriting manufacturer descriptions, fixing infinite crawl spaces, fixing stale content issues, fixing canonicalization issues, and fixing duplicate meta data. For each tactic, the document outlines the goal, time to see results, impact, key performance indicators, and assumptions used to estimate potential results. The overall document aims to educate on SEO best practices and tactics to improve search visibility and organic traffic.
Reducing Server Resources: Improve Costs, SEO, Conversions & UX
A presentation I gave at the Melbourne SEO Meetup event in January 2015, this was a case study I undertook based on the experiences I was thrust into by managing my own websites and my web hosting provider.
As part of this presentation, I go through the issues i faced, how i diagnosed the problems, the solutions I put forward and finally, the results I saw.
Even though it wasn't exactly a great experience at the time, I actually learnt quite a lot and wish I has implemented the solutions much earlier. If there is one take away from my presentation, it's implement a CDN solution - the time to implement one is minimal and the ROI and potential UX improvements are phenomenal.
Please feel free to ask any questions in the comment box below, email me at info@holidaypoint.com.au, or if you live in Melbourne, come to the dedicated SEO Meetup at http://www.meetup.com/Melbourne-SEO/
Keyword stuffing, invisible text, doorway pages, and cloaking are common black hat SEO techniques. Black hat SEO aims to manipulate search engine algorithms through these and other unethical methods such as typo spam, link dumping, faking page ranks, scraping content from other sites, and tactics to lower competitors' rankings. Questions about black hat SEO techniques can be directed to the listed websites.
I got this slide show over a month a go. And this is so great! For who need build some page such as website, blog and or news site or maybe portal site. Its great because there are one more way for buzz up your page in php :)
The document discusses common SEO mistakes that bloggers make and provides recommendations to improve blog SEO. It recommends optimizing title tags, URLs, internal linking, anchor text, RSS feeds, and minimizing duplicate content. Key recommendations include using the post title in title tags and as anchor text, keeping URLs and slugs short, adding keyword-rich descriptions to categories and tags, and using plugins to manage related posts, pagination and sticky posts.
GRUPO CONSTRUCTOR MIAHUATLAN - Tutorial: Google for Webmasters
This document provides an overview of Google tools and resources for webmasters, including how to get pages indexed by Google, use XML sitemaps, block content from search engines, make sites accessible, understand PageRank and ranking factors, use Webmaster Tools, and find additional Google products. It discusses indexing, crawling, discoverability, duplicate content, accessibility, titles/descriptions, rankings, guidelines, and the Webmaster Central blog.
Charisma Productions Network - Tutorial: Google for Webmasters
The document provides an overview of Google's resources for webmasters to help them understand how Google discovers, indexes, ranks websites. It discusses tools like Google Search Console (formerly Google Webmaster Tools), Sitemaps, robots.txt files, and best practices for accessibility, duplicate content, links and PageRank. The goal is to help webmasters create websites that are discoverable, accessible and relevant to Google's algorithms.
Search Engine Optimization Tools - Tutorial: Google for Webmaster
The document provides an overview of Google's resources for webmasters to help them understand how Google discovers, indexes, ranks websites. It discusses tools like Google Search Console (formerly Google Webmaster Tools), Sitemaps, robots.txt files, and best practices for accessibility, duplicate content, links and PageRank. The goal is to help webmasters create websites that are discoverable, accessible and relevant to Google's algorithms.
Tools are a must for serious SEOs; they deliver the flexibility and capability to tackle jobs of any size. Knowing which ones best fit your needs, budget and the scale of the sites you work on is critical.
In this clinic, our veteran SEOs open their own tool chests, share with you their favorites (both free and paid) and take your questions about how to use them (and others) effectively. These are tools that have earned the loyalty of our speakers thanks to their utility, features and ability to help maximize time - no sponsored advice here!
Connecting with your audience is objective number one for any website. Findability—the discipline of helping users discover the content they seek—not only helps businesses get their message out, but it improves the user experience, too. The secret to attaining findability bliss, both with search engines and beyond, lies in the wisdom of web standards.
La liebre se burla de la lenta tortuga y la reta a una carrera, confiando en su velocidad. Sin embargo, la liebre se detiene varias veces a descansar mientras la tortuga avanza sin parar. Finalmente, la liebre se queda dormida y la tortuga gana la carrera, enseñando que el esfuerzo constante puede vencer a la confianza excesiva.
This document appears to be instructions for playing a game of Jeopardy using a digital presentation. It provides directions on how to navigate through the game, input answers and questions, keep score on the game boards, and contains sample questions in categories like "Winning the Civil War", "Union", and "Slaves". The instructions emphasize to not save over the original game file after playing.
This document appears to be instructions for playing a game of Jeopardy using a digital presentation. It provides directions on how to navigate through the game, input answers and questions, keep score on the game boards, and contains sample questions in categories like "Winning the Civil War", "Union", and "Slaves". The instructions emphasize to not save over the original game file after playing.
Artificial intelligence (AI) is everywhere, promising self-driving cars, medical breakthroughs, and new ways of working. But how do you separate hype from reality? How can your company apply AI to solve real business problems?
Here’s what AI learnings your business should keep in mind for 2017.
We asked LinkedIn members worldwide about their levels of interest in the latest wave of technology: whether they’re using wearables, and whether they intend to buy self-driving cars and VR headsets as they become available. We asked them too about their attitudes to technology and to the growing role of Artificial Intelligence (AI) in the devices that they use. The answers were fascinating – and in many cases, surprising.
This SlideShare explores the full results of this study, including detailed market-by-market breakdowns of intention levels for each technology – and how attitudes change with age, location and seniority level. If you’re marketing a tech brand – or planning to use VR and wearables to reach a professional audience – then these are insights you won’t want to miss.
Teaching Students with Emojis, Emoticons, & Textspeak
This document discusses how emojis, emoticons, and text speak can be used to teach students. It provides background on the origins of emoticons in 1982 as ways to convey tone and feelings in text communications. It then suggests that with text speak and emojis, students can translate, decode, summarize, play with language, and add emotion to language. A number of websites and apps that can be used for emoji-related activities, lessons, and discussions are also listed.
There are many ways to optimize your website, and it’s hard to know where to start. In this webinar we’ll show you five top performance optimizations and explain how each will impact your load time and order. We’ll also share tips and tricks on how to apply each, since the devil’s in the details. We’ll focus on the following five optimizations:
* Domain Sharding
* Consolidation
* Inlining
* Predict Head
* Asynchronous Javascript Loading
SOA (Service Oriented Architecture) is a collection of loosely-coupled services that communicate with each other over a network. Web services are a common implementation of SOA that use XML-based open standards like SOAP, WSDL, and UDDI. A WSDL file defines the operations and parameters of a web service, acting as a contract between the service and its clients. SOAP is an XML-based messaging protocol used to invoke operations defined in a WSDL over various transports like HTTP.
The document discusses content duplication and how search engines handle it. It explains that duplication hurts search results by providing less unique content to users. The document provides advice to webmasters on how to avoid accidental duplication that could impact how search engines view their sites.
How I learned to stop worrying and love the .htaccess fileRoxana Stingu
An introduction to .htaccess and what this file can do to help with SEO.
Redirects:
- Mod_alias and mod_rewrite
- Most common redirect types (domain migrations, subdomain to folder and folder renaming and how to deal with duplicate content).
Indexing & Crawling:
- Set HTTP headers for canonicals and meta robots for non-HTML files.
Website speed:
- Gzip and Deflate
- Cache control
Why Pay for Performance When You Can Lead the World To Your Door for Free?Hamlet Batista
This document provides an overview of 15 proven SEO tactics and their impact, implementation costs, and potential results. The tactics include writing descriptive titles and meta descriptions, optimizing mobile pages, displaying video thumbnails, optimizing images and videos, finding keyword opportunities, rewriting manufacturer descriptions, fixing infinite crawl spaces, fixing stale content issues, fixing canonicalization issues, and fixing duplicate meta data. For each tactic, the document outlines the goal, time to see results, impact, key performance indicators, and assumptions used to estimate potential results. The overall document aims to educate on SEO best practices and tactics to improve search visibility and organic traffic.
Reducing Server Resources: Improve Costs, SEO, Conversions & UXMichael Jones
A presentation I gave at the Melbourne SEO Meetup event in January 2015, this was a case study I undertook based on the experiences I was thrust into by managing my own websites and my web hosting provider.
As part of this presentation, I go through the issues i faced, how i diagnosed the problems, the solutions I put forward and finally, the results I saw.
Even though it wasn't exactly a great experience at the time, I actually learnt quite a lot and wish I has implemented the solutions much earlier. If there is one take away from my presentation, it's implement a CDN solution - the time to implement one is minimal and the ROI and potential UX improvements are phenomenal.
Please feel free to ask any questions in the comment box below, email me at info@holidaypoint.com.au, or if you live in Melbourne, come to the dedicated SEO Meetup at http://www.meetup.com/Melbourne-SEO/
Keyword stuffing, invisible text, doorway pages, and cloaking are common black hat SEO techniques. Black hat SEO aims to manipulate search engine algorithms through these and other unethical methods such as typo spam, link dumping, faking page ranks, scraping content from other sites, and tactics to lower competitors' rankings. Questions about black hat SEO techniques can be directed to the listed websites.
I got this slide show over a month a go. And this is so great! For who need build some page such as website, blog and or news site or maybe portal site. Its great because there are one more way for buzz up your page in php :)
The document discusses common SEO mistakes that bloggers make and provides recommendations to improve blog SEO. It recommends optimizing title tags, URLs, internal linking, anchor text, RSS feeds, and minimizing duplicate content. Key recommendations include using the post title in title tags and as anchor text, keeping URLs and slugs short, adding keyword-rich descriptions to categories and tags, and using plugins to manage related posts, pagination and sticky posts.
This document provides an overview of Google tools and resources for webmasters, including how to get pages indexed by Google, use XML sitemaps, block content from search engines, make sites accessible, understand PageRank and ranking factors, use Webmaster Tools, and find additional Google products. It discusses indexing, crawling, discoverability, duplicate content, accessibility, titles/descriptions, rankings, guidelines, and the Webmaster Central blog.
Charisma Productions Network - Tutorial: Google for WebmastersBetty Andrews
The document provides an overview of Google's resources for webmasters to help them understand how Google discovers, indexes, ranks websites. It discusses tools like Google Search Console (formerly Google Webmaster Tools), Sitemaps, robots.txt files, and best practices for accessibility, duplicate content, links and PageRank. The goal is to help webmasters create websites that are discoverable, accessible and relevant to Google's algorithms.
Search Engine Optimization Tools - Tutorial: Google for WebmasterPraveen Sudarsan
The document provides an overview of Google's resources for webmasters to help them understand how Google discovers, indexes, ranks websites. It discusses tools like Google Search Console (formerly Google Webmaster Tools), Sitemaps, robots.txt files, and best practices for accessibility, duplicate content, links and PageRank. The goal is to help webmasters create websites that are discoverable, accessible and relevant to Google's algorithms.
Tools are a must for serious SEOs; they deliver the flexibility and capability to tackle jobs of any size. Knowing which ones best fit your needs, budget and the scale of the sites you work on is critical.
In this clinic, our veteran SEOs open their own tool chests, share with you their favorites (both free and paid) and take your questions about how to use them (and others) effectively. These are tools that have earned the loyalty of our speakers thanks to their utility, features and ability to help maximize time - no sponsored advice here!
Findability Bliss Through Web StandardsAarron Walter
Connecting with your audience is objective number one for any website. Findability—the discipline of helping users discover the content they seek—not only helps businesses get their message out, but it improves the user experience, too. The secret to attaining findability bliss, both with search engines and beyond, lies in the wisdom of web standards.
La liebre se burla de la lenta tortuga y la reta a una carrera, confiando en su velocidad. Sin embargo, la liebre se detiene varias veces a descansar mientras la tortuga avanza sin parar. Finalmente, la liebre se queda dormida y la tortuga gana la carrera, enseñando que el esfuerzo constante puede vencer a la confianza excesiva.
This document appears to be instructions for playing a game of Jeopardy using a digital presentation. It provides directions on how to navigate through the game, input answers and questions, keep score on the game boards, and contains sample questions in categories like "Winning the Civil War", "Union", and "Slaves". The instructions emphasize to not save over the original game file after playing.
This document appears to be instructions for playing a game of Jeopardy using a digital presentation. It provides directions on how to navigate through the game, input answers and questions, keep score on the game boards, and contains sample questions in categories like "Winning the Civil War", "Union", and "Slaves". The instructions emphasize to not save over the original game file after playing.
Artificial intelligence (AI) is everywhere, promising self-driving cars, medical breakthroughs, and new ways of working. But how do you separate hype from reality? How can your company apply AI to solve real business problems?
Here’s what AI learnings your business should keep in mind for 2017.
Study: The Future of VR, AR and Self-Driving CarsLinkedIn
We asked LinkedIn members worldwide about their levels of interest in the latest wave of technology: whether they’re using wearables, and whether they intend to buy self-driving cars and VR headsets as they become available. We asked them too about their attitudes to technology and to the growing role of Artificial Intelligence (AI) in the devices that they use. The answers were fascinating – and in many cases, surprising.
This SlideShare explores the full results of this study, including detailed market-by-market breakdowns of intention levels for each technology – and how attitudes change with age, location and seniority level. If you’re marketing a tech brand – or planning to use VR and wearables to reach a professional audience – then these are insights you won’t want to miss.
This document discusses how emojis, emoticons, and text speak can be used to teach students. It provides background on the origins of emoticons in 1982 as ways to convey tone and feelings in text communications. It then suggests that with text speak and emojis, students can translate, decode, summarize, play with language, and add emotion to language. A number of websites and apps that can be used for emoji-related activities, lessons, and discussions are also listed.
There are many ways to optimize your website, and it’s hard to know where to start. In this webinar we’ll show you five top performance optimizations and explain how each will impact your load time and order. We’ll also share tips and tricks on how to apply each, since the devil’s in the details. We’ll focus on the following five optimizations:
* Domain Sharding
* Consolidation
* Inlining
* Predict Head
* Asynchronous Javascript Loading
This document provides an overview of HTML5, Backbone.js, and web development. It introduces key concepts like client-server architecture, APIs, databases, markup languages, and frameworks like jQuery, Bootstrap, and Backbone. It discusses modern front-end development practices and server-side programming. Mobile web development options like native, hybrid, and PhoneGap are also covered. The document emphasizes learning resources and stresses attention to details, user experience, and adaptability to new technologies in the field.
SharePoint Advanced Administration with Joel Oleson, Shane Young and Mike WatsonJoel Oleson
Global Intranets, Extranets, and Internet sites in advanced farm deployments. Lessons learned and guidance is shared in this deck... Caching, Firewall, Security, Optimization, etc... Presented with Joel Oleson, Shane Young, and Mike Watson at Tech Ed 2008
Web Performance, Scalability, and Testing Techniques - Boston PHP MeetupJonathan Klein
I gave this talk on 4/27/11 at the Boston PHP Meetup Group. It covers both server side and client side optimizations, as well as monitoring tools and techniques.
The document discusses the benefits of exercise for mental health. Regular physical activity can help reduce anxiety and depression and improve mood and cognitive functioning. Exercise causes chemical changes in the brain that may help protect against mental illness and improve symptoms.
SUMMARY :
We all have the contradictory feeling to deliver not-so-bad projects, with no-so-bad performances.
But what really is an perfectly optimized project ?
For you : optimized PHP code & SQL queries
For your boss : the customer who never complains
For the customer : own experience on his workstation
For the business : who really know and care ?
For end-user : who can really know the end-user experience (could be millions of users) ?
Without losing interest on technical aspects (PHP, MySql, Solr, Varnish, CDN, etc.) & softwares (new relic, jmeter, etc.), this presentation will send a feedback from real projects to :
How to integrate performances within the project scope ?
What & how to measure & collect smart metrics ?
Enlarge the scope : from your dev workstation to the end-user… in china !
Experience level: Intermediate
Session Track: Performance
The document discusses the benefits of data driven web design over static HTML pages. It explains that a data driven approach involves storing information in databases and using programming languages like PHP to dynamically generate pages based on the database content. This allows websites to have customized, up-to-date content and interactive features like discussion boards that can be easily managed and updated.
The document provides tips for optimizing various aspects of a website including the front end, application and database, web server, and miscellaneous topics. It recommends techniques such as minimizing HTTP requests, leveraging caching, optimizing databases and queries, offloading processing, and load balancing between web servers to improve page loading speeds and site performance. The overall goal is to analyze bottlenecks and apply solutions such as file compression, caching, and leveraging CDNs or reverse proxies to make websites faster and more scalable.
This document discusses various techniques for improving the frontend performance of Drupal websites. It begins by introducing the speaker and describing the goals of the presentation. The bulk of the document then provides recommendations in three areas: backend server optimizations like caching, parallel downloads and gzip compression; tools for measuring performance; and frontend optimizations like minimizing requests, lazy loading images, and improving CSS and JavaScript. The document encourages proper performance diagnosis and defines goals before implementing solutions.
Intro to mobile web application developmentzonathen
Learn all the basics of web app development including bootstrap, handlebars templates, jquery and angularjs, as well as using hybrid app deployment on a phone.
Apache Traffic Server is a high performance caching proxy that can improve performance and uptime. It is open source software originally created by Yahoo and used widely at Yahoo. It can be used as a content delivery network, reverse proxy, forward proxy, and general proxy. Configuration primarily involves files like remap.config, records.config, and storage.config. Plugins can also be created to extend its functionality.
Voldemort & Hadoop @ Linkedin, Hadoop User Group Jan 2010Bhupesh Bansal
Jan 22nd, 2010 Hadoop meetup presentation on project voldemort and how it plays well with Hadoop at linkedin. The talk focus on Linkedin Hadoop ecosystem. How linkedin manage complex workflows, data ETL , data storage and online serving of 100GB to TB of data.
The document discusses Project Voldemort, a distributed key-value storage system developed at LinkedIn. It provides an overview of Voldemort's motivation and features, including high availability, horizontal scalability, and consistency guarantees. It also describes LinkedIn's use of Voldemort and Hadoop for applications like event logging, online lookups, and batch processing of large datasets.
Migrating to SharePoint 2013 - Business and Technical PerspectiveJohn Calvert
Many organizations still run versions of SharePoint prior to 2013, but the appetite and pressure to upgrade is increasing as business and IT better understand the new features and capabilities of SharePoint 2013 / Online combined with its sister products Office 2013 and Exchange 2013, or alternately Office 365. Drawing on experience from real client engagements in this presentation we examine the business and technical roadmap, and challenges in planning and executing a migration to SharePoint 2013.
WordPress Optimization
This presentation discusses optimizing WordPress sites for speed and performance. There are many layers that can be optimized including:
1. Front-end optimizations like using a CDN, image compression, browser caching, and minifying CSS and JavaScript.
2. Optimizing the theme and plugins by removing unused code and plugins, updating WordPress core, and ensuring good coding practices.
3. Back-end optimizations like caching pages and objects, using a reverse proxy, optimizing the database, and ensuring a fast web and database server.
The presenter provides many specific techniques and tools to optimize at each level like W3 Total Cache, Nginx, Memcached, and MySQL
Make Drupal Run Fast - increase page load speedAndy Kucharski
What does it mean when someone says “My Site is slow now”? What is page speed? How do you measure it? How can you make it faster? We’ll try to answer these questions, provide you with a set of tools to use and explain how this relates to your server load.
We will cover:
- What is page load speed? – Tools used to measure performance of your pages and site – Six Key Improvements to make Drupal “run fast”
++ Performance Module settings and how they work
++ Caching – biggest gainer and how to implement Boost
++ Other quick hits: off loading search, tweaking settings & why running crons is important
++ Ask your host about APC and how to make sure its set up correctly
++ Dare we look at the database? Easy changes that will help a lot!
- Monitoring Best practices – what to set up to make sure you know what is going on with your server – What if you get slashdoted? Recommendation on how to quickly take cover from a rhino.
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.
This document discusses building a simple automated deployment platform with PHP and Linux. It describes taking a website offline for manual upgrades, which is time-consuming and error-prone. The document then outlines techniques for automating the deployment process, including exporting code from version control, applying file permissions and configuration changes, backing up and patching databases, running unit tests, and using symlinks to swap environments. It emphasizes the need for rollback capabilities and managing multiple environments like staging and production. The goal is to provide techniques for small teams and startups to continuously and reliably deploy updates.
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!
TrustArc Webinar - 2024 Data Privacy Trends: A Mid-Year Check-InTrustArc
Six months into 2024, and it is clear the privacy ecosystem takes no days off!! Regulators continue to implement and enforce new regulations, businesses strive to meet requirements, and technology advances like AI have privacy professionals scratching their heads about managing risk.
What can we learn about the first six months of data privacy trends and events in 2024? How should this inform your privacy program management for the rest of the year?
Join TrustArc, Goodwin, and Snyk privacy experts as they discuss the changes we’ve seen in the first half of 2024 and gain insight into the concrete, actionable steps you can take to up-level your privacy program in the second half of the year.
This webinar will review:
- Key changes to privacy regulations in 2024
- Key themes in privacy and data governance in 2024
- How to maximize your privacy program in the second half of 2024
Details of description part II: Describing images in practice - Tech Forum 2024BookNet Canada
This presentation explores the practical application of image description techniques. Familiar guidelines will be demonstrated in practice, and descriptions will be developed “live”! If you have learned a lot about the theory of image description techniques but want to feel more confident putting them into practice, this is the presentation for you. There will be useful, actionable information for everyone, whether you are working with authors, colleagues, alone, or leveraging AI as a collaborator.
Link to presentation recording and transcript: https://bnctechforum.ca/sessions/details-of-description-part-ii-describing-images-in-practice/
Presented by BookNet Canada on June 25, 2024, with support from the Department of Canadian Heritage.
Measuring the Impact of Network Latency at TwitterScyllaDB
Widya Salim and Victor Ma will outline the causal impact analysis, framework, and key learnings used to quantify the impact of reducing Twitter's network latency.
Comparison Table of DiskWarrior Alternatives.pdfAndrey Yasko
To help you choose the best DiskWarrior alternative, we've compiled a comparison table summarizing the features, pros, cons, and pricing of six alternatives.
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.
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.
Are you interested in dipping your toes in the cloud native observability waters, but as an engineer you are not sure where to get started with tracing problems through your microservices and application landscapes on Kubernetes? Then this is the session for you, where we take you on your first steps in an active open-source project that offers a buffet of languages, challenges, and opportunities for getting started with telemetry data.
The project is called openTelemetry, but before diving into the specifics, we’ll start with de-mystifying key concepts and terms such as observability, telemetry, instrumentation, cardinality, percentile to lay a foundation. After understanding the nuts and bolts of observability and distributed traces, we’ll explore the openTelemetry community; its Special Interest Groups (SIGs), repositories, and how to become not only an end-user, but possibly a contributor.We will wrap up with an overview of the components in this project, such as the Collector, the OpenTelemetry protocol (OTLP), its APIs, and its SDKs.
Attendees will leave with an understanding of key observability concepts, become grounded in distributed tracing terminology, be aware of the components of openTelemetry, and know how to take their first steps to an open-source contribution!
Key Takeaways: Open source, vendor neutral instrumentation is an exciting new reality as the industry standardizes on openTelemetry for observability. OpenTelemetry is on a mission to enable effective observability by making high-quality, portable telemetry ubiquitous. The world of observability and monitoring today has a steep learning curve and in order to achieve ubiquity, the project would benefit from growing our contributor community.
BT & Neo4j: Knowledge Graphs for Critical Enterprise Systems.pptx.pdfNeo4j
Presented at Gartner Data & Analytics, London Maty 2024. BT Group has used the Neo4j Graph Database to enable impressive digital transformation programs over the last 6 years. By re-imagining their operational support systems to adopt self-serve and data lead principles they have substantially reduced the number of applications and complexity of their operations. The result has been a substantial reduction in risk and costs while improving time to value, innovation, and process automation. Join this session to hear their story, the lessons they learned along the way and how their future innovation plans include the exploration of uses of EKG + Generative AI.
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.
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)
Advanced Techniques for Cyber Security Analysis and Anomaly DetectionBert Blevins
Cybersecurity is a major concern in today's connected digital world. Threats to organizations are constantly evolving and have the potential to compromise sensitive information, disrupt operations, and lead to significant financial losses. Traditional cybersecurity techniques often fall short against modern attackers. Therefore, advanced techniques for cyber security analysis and anomaly detection are essential for protecting digital assets. This blog explores these cutting-edge methods, providing a comprehensive overview of their application and importance.
Sustainability requires ingenuity and stewardship. Did you know Pigging Solutions pigging systems help you achieve your sustainable manufacturing goals AND provide rapid return on investment.
How? Our systems recover over 99% of product in transfer piping. Recovering trapped product from transfer lines that would otherwise become flush-waste, means you can increase batch yields and eliminate flush waste. From raw materials to finished product, if you can pump it, we can pig it.
2. Venrock and the Quarry are looking for Summer Interns: Ruby on Rails Engineers Community Manager Digital Media Analyst Digital Media Associate Full Time Professional Web Engineers Mobile/Media/Social MVC / Full stack OS->DB->App->Code->Web Server->HTML/JS/CSS/Ajax->Flash www.venrock.com
3. Scaling 101 - Assumptions / Misc Target Audience Engineers (but not professional web infrastructure) Give a "lay of the land" rather than heavy specifics < 20M database rows Will distribute the preso Links to various topics are provided as appendix Please interrupt with questions, but might table them for later About 30 slides
5. Doesn't have to be rocket science... Scaling 101 isn't hard Understand the principles If Scaling 101 isn't enough to handle your traffic... you've probably have enough traffic to get Series A funding Sometimes there is a quick-n-easy solution If not, follow basic problem solving cycle... analyze research trial-n-error (hopefully with testing ;-)
6. Scaling 101 Principles - Slow to Fast Infrastructure Speed External network accessed Internal network accessed DB on another server: DB Delete DB Update DB Select (goes to disk) DB Select (table in memory) DB Select cached Memcached local filesystem local DB local memcached local app server memory Specific Examples Roundtrip query to Facebook Database table scans on large tables (>100 rows) Dynamically Rendering high volume generic pages Too many database calls per page load (>5-10)
7. Typical Infrastructure Evolution Single Server - get the app out! Optimize to try to stay on a single server Dedicated Database Server Multiple Web/App Servers - Load Balancing Add More Database Servers More Separation - Web and App servers Specific Guidelines for when to level up...
8. Specific Guidelines - Nada There aren't any. Why? heavy static files vs. very dynamic application code is different database activity is different lots of selects vs. inserts vs. updates vs. deletes lots of complex JOINs vs. simple selects traffic patterns 8, 12 or 24 hour day? Occasional Spikes (Digg, Slashdot) hardware is different from hosting vendor to hosting vendor
9. Optimize - Profiling your app Questions to ask: Which pages are getting hit the most Google Analytics Web server logs Which pages take the longest to render Firebug - Net tab Yahoo's YSlow Add-on Apache Benchmark tool JMeter external monitoring site, e.g. Site24x7
10. Optimize - Profiling your app Next question: What pieces of those long, popular pages are taking the longest? Facebook queries application code blocks database queries static file downloads (images,CSS, JS)
11. Optimize - Profiling your app How to actually find the offenders ... Application Code: put debug statements to see where the most time is being spent Page Loading / Static file downloads Firefox Extensions: Yahoo YSlow for Firebug: see which pieces take the longest to download / finish rendering Live HTTP Headers: Are your static files being cached locally? Database MySQL slow query log MySQL Query log MySQL "EXPLAIN" Queries
13. Optimize - Remedies Facebook queries Reduce Roundtrips to FB with more complex FQL (e.g. subqueries) Cache Results Use FBML where possible - make FB do the work fb:user fb:name fb:profile-pic Fix inefficient application code any examples?
14. Optimize - Remedies Optimize SQL Queries Database Indexes Only select what you need to select Views, Stored Procedures Confirm static files are being cached locally in browser (Images, JS and CSS) Apache Config... Caching...
15. Optimize - Caching What? - Expensive pieces Facebook User Information (24hrs) complex calculations generic pages (or fragments) complex, big or long DB queries
16. Optimize - Caching Where to? Filesystem HTML pages served directly from Apache w/ no PHP expensive HTML fragments loaded via PHP User's Session Facebook User Info Application state Memcached - (or BerkeleyDB) HTML Session Facebook data (24hrs max) expensive DB query results Database Query Cache repeated queries
17. Optimize - Apache Are you using all your resources? If you have 10 Apache processes (MaxClients) and 15 users hit your app at the same time, 10 will get served, 5 will get an error Do you need more Apache processes? No if your box's CPU and/or RAM are maxing out (use top) need top optimize the app or add more servers Yes if the requests involve waiting for a long time for Facebook to answer a query (i.e. Apache is just waiting) Add more processes (MaxClients)
18. Optimize - Apache # prefork MPM # StartServers: number of server processes to start # MinSpareServers: minimum number of server processes which are kept spare # MaxSpareServers: maximum number of server processes which are kept spare # MaxClients: maximum number of server processes allowed to start # MaxRequestsPerChild: maximum number of requests a server process serves <IfModule mpm_prefork_module> StartServers 5 MinSpareServers 5 MaxSpareServers 10 MaxClients 150 MaxRequestsPerChild 0 </IfModule>
19. Multi-Server - Dedicated DB Needs to be sitting next to the web/app server with a fast link Port 3306 open from Web/App to DB servers MySQL User account has to allow connections from the web/app servers
20. Multi-Server - Dedicated DB If standard hardware/slices: keep your DB server where it is setup a new slice as a web/app server get your new slice working test load-test cut-over your DNS address
21. Multi-Server - Dedicated DB If DB performance is a bottleneck and you are going to a larger server for your DB... Configure / Test Configure the new DB mysqldump of your existing DB (do you have enough disk? dump over the wire) new DB: mysql < dump configure your new DB server as an Apache and PHP server as well for testing functional test / load test
22. Multi-Server - Dedicated DB If DB performance is a bottleneck and you are going to a larger server for your DB... Cut-over shutdown the production webserver mysqldump old import mysql to new configure your existing web/app server to point to new db
24. Load Balancing Goals: Load and/or Fault Tolerance Technologies DNS Round Robin Potential Windows / IE issues due to caching Open Source Software Apache reverse Proxy (Apache 2.2) HAProxy Pound Hardware 10x or more performance than software some hosting vendors provide it as an add-on or part of a package
25. Multiple DB Servers Getting more involved... Master/Slave reads go to slaves transactional reads or guaranteed updated data reads go to master writes go to master Getting close to Rock Science... Master/Master (possibly with slaves) clusters
26. Other Easy Tricks Put static files on Amazon's S3 Images, JS, CSS, Videos Optimize Page Loads (not really scalability, but...) Put external "stuff" at the bottom of the page outside TABLES Ad Tags Google Analytics Digg buttons DIV's instead of tables if possible tables wait for all content to be loaded before rendering div's typically render piece by piece
27. Finally - The End Feedback to Yee or me: cfinne at venrock . com Follow-on questions or consults: cfinne at venrock . com Next Talk? Interaction Design - David Cortright Venture Capital - Some VC (Brian, Ilya, Dev...) Code / Web App Design - me (again???)
28. Links MySQL Slow Query Log: http://dev.mysql.com/doc/refman/5.0/en/slow-query-log.html MySQL General Query Log: http://dev.mysql.com/doc/refman/5.0/en/query-log.html MySQL Query Cache: http://jayant7k.blogspot.com/2007/07/mysql-query-cache.html http://dev.mysql.com/doc/refman/5.0/en/query-cache.html MySQL Optimize Queries and DB Indexes http://www.databasejournal.com/features/mysql/article.php/1382791 Memcached: http://us3.php.net/memcache http://www.danga.com/memcached/