I work in online advertising (AdGear/Montreal/Canada) and a lot of the business is around RTB (Real Time Bidding). This is an area where millions of requests/second is the norm and latency is the name of the game.

We've been using Cassandra for many years. As the business has grown, we've refreshed/updated/resized/tweaked/hacked the cluster. Unfortunately past a certain point, there were no more performance wins to be had - further - we started experiencing stability issues.

We came across ScyllaDB. I had heard about the underlying SeaStar framework and was excited to test something based on it that was addressing a real pain point.

We are not (yet) customers of ScyllaDB - however we're pretty advanced into our POC. To summarize: * Extremely low latency compared to cassandra * During delivery valeys, peaks, and even burst batch loads * It delivers the above running on a fraction of the hardware Cassandra does * Very good no-bs responsive engineering support

Scylla's having a conference in SF later this month where AdGear will be presenting our use case more in depth. If it sounds like the product may address some pain points you're working on, might be worth attending.

/not affiliated with Scylla beyond the potential-customer-in-POC case described above

I'm affiliated so just go to these links: http://www.scylladb.com/scylla-summit-2017/ http://www.scylladb.com/users/

We have multiple clusters of Scylla deployed in production. We have been using ScyllaDB in production since version 1.2 (more than an year now).

Our use case is web-scale and real-time IoT.

Our experience with the product (as well as the team behind it) has been extremely positive.