What data stores do stock exchanges use?

Question

I'm interested in building a stock market-like application with orders, quotes, bid/ask prices etc...I can easily see this being represented in a relational database (and for my volume SQL would suffice), but I can't imagine real exchanges use SQL processing billions of order per day? What does their stack look like?

lkowalcz · Accepted Answer

At IEX, we use kdb.Here&rsquo;s a blog post from a former employee at a new startup comparing kdb against some alternative databases for common operations on financial data: https://medium.com/prooftrading/selecting-a-database-for-an-...

nikivi · Answer

They might use kdb, not sure https://kx.com

mtmail · Answer

Welcome to HN. It helps to prefix the question title with 'Ask HN:'. Those go to https://news.ycombinator.com/ask