[UPHPU] eCommerce - what do you use?

[Darrin Keller]

> On the down side, X-cart does like lots of elbow room.  Some add-on  
> modules and combinations of modules can make it a resource hog. 


We won a contract with a large, well known media company. We'll be building a store for them. We have a custom store solution. However, we recently and quite inadvertently, ran a stress test. We had around 1000 concurrent users trying to checkout and it nearly crashed our server. Our new client may have as many as 20,000 concurrent users. Is there an open source solution that could handle this? If not, is there anyone on this list who specializes in balancing and optimization/performance tuning? 

Along these same lines, we are growing and need a senior developer (5-7 years experience).

Thank you,
Darrin Keller