Ebay architecture scalability

At SD Forum 2006, Randy Shoup and Dan Pritchett, both with eBay, gave a presentation on eBay's architecture. Pritchett subsequently posted his presentation slides in his blog, The eBay Architecture. Predictably, the presentation contained a few inspiring statistics, such as: 15,000 application instances running in eight data centers 212,000,000 registered users 1 billion page views per day 26 billion SQL queries and updates per day Over 2 petabytes of data $1,590 worth of goods traded per second Over 1 billion photos 7 languages 99.94% uptime

Other stats in the presentation related to development process and features, such as:

"According to the presentation, the goal of eBay's current architecture is to handle an additional ten-fold increase in traffic, something eBay expects to reach within a few short years. Another architecture objective is to be able to handle peak loads, and for components to gracefully degrade under unusual load or in the case of system failures." read more  HERE

 

Category: Performances

YouTube Scalability Talk

Kyle Cordes’s blog post on the “YouTube Scalability Talk” It’s definitely worth reading!

Category: Performances

Speed up your web pages with YSlow

YSlow analyzes web pages and tells you why they're slow based on the rules for high performance web sites. YSlow is a Firefox add-on integrated with the popular Firebug web development tool. YSlow gives you:

• Performance report card
• HTTP/HTML summary
• List of components in the page
• Tools including JSLint

Download HERE
Visit also the homepage of the team behind this tool: Yahoo!'s Exceptional Performance Team

You should not take too much time to guess that I am currently optimizing my homepage :-)
Be careful, running this tool more than 5 times make my Firefox crash ;-)

Some statistics:

• forums.waltercedric.com Performance Grade: B (87), still working on it
• www.waltercedric.com Performance Grade: B (83) was F before, still working on it
• gallery.waltercedric.com Performance Grade: D (66), still working on it

Some useful links

• ShrinkSafe is a JavaScript "compression" system. It can typically reduce the size of your scripts by a third or more, depending on your programming style.
• mod_expires apache 2.0 modules documentation in order to reduce bandwidth
• mod_deflate and mod_expires small howto
• compressing javascript or how to compress javascript with htaccess, useful if you can't touch the apache configuration.

Be careful! a lot of host get pretty low metering (just test your favorite internet site), but are still very fast -> this tools do not tell You their infrastructure: memcache server, multiple db server, multiple file server for static content and so on.

Category: Performances