eBay is the world’s largest internet marketplace, with hundreds of millions of listings live at any given moment.  To support that marketplace, eBay has tackled technical challenges at a scale that few others have.  With the eBay Tech Blog, we want to share our experiences working on those challenges with the technical community.  We’ll talk less about eBay’s business (there are plenty of blogs already for that) and more about the internal workings of eBay’s search engine, data, and architecture.