February 27, 2008

eBay OLTP architecture

I’ve posted a couple times about eBay’s analytics side. As a companion, Don Burleson pointed me at a fascinating November, 2006 slide presentation outlining eBay’s transactional architecture and evolution. Highlights include:

A whole lot of manual slicing of Oracle databases, so as not to exceed their capacity.
A whole lot of careful design and ordering of transactions.
Putting all the business logic in the application tier, with a custom O/R mapper. There’s lots of caching there, but very little state.

The presentation has a bunch of specific numbers, in case anybody wants to dive in.

Categories: eBay, OLTP, Specific users

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