转:Web 2.0: How High-Volume eBay Manages Its Storage

http://www.eweek.com/article2/0,1895,2047252,00.asp

摘要:

The site averages more than 1 billion page views per day.

Users trade about $1,700 worth of goods on the site every second.

26 billion SQL queries per day.

The site currently posts about 600 million listings per quarter and about 204 million registered users.

The site's availability has been charted at 99.94 percent per day (a hiccup of about 50 seconds per day). When it was charted in June 1999, the site was latent an average of 43 minutes per day.

eBay said it uses a traditional grid computing system with the following features to build the site:

• about 170 Win2000/Win2003 servers
• about 170 Linux (RHES3) servers
• three Solaris servers: build and deploy eBay.com to QA; compile Java & C++; consolidate/optimize/compress XSL, JS and HTML
• time to build site: was once 10 hours; now only 30 minutes
• in the last 2.5 years, there have been 2 million builds.

Then, the content is deployed to a system of about 15,000 servers.

eBay's structure is, according to Strong:

• highly distributed
• the auction site is Java-based; the search infrastructure is written in C++
• have hundreds of developers, all working on the same code