If I asked you what is the world's largest marketplace, what would you say?
I haven't been able to confirm this, but it's certainly believable when eBay claims the title.
This is an interesting piece about eBay's technology.
eBay's VP of systems and architecture James Barrese writes that
eBay hosts 100 million concurrent listings, which are updated at a rate of 500 times per second and searched 3,800 times per second. Our more than 233 million users–a number that increases at a rate of 130,000 users per day–generate more than a billion daily page views. To put that in perspective, we've created and have to maintain a tech platform that supports a transactional volume higher than Nasdaq's.
That's pretty amazing. Not bad for a site for a site that was NOT created to trade PEZ dispensers.