[mthomassen]

Just to provide a counter statement; at $work we definatively do not have the appropriate headcount to even start considering running our own distrubuted datastores. However, we _do_ use Cassandra. And while many persons shared the sentiment of 'it being to hard to maintain' when the first few projects started to incorporate Cassandra, the truth is; there never has been any failure or incident, or even technical hurdle related to the usage/maintenance of the -admittedly smallish- Cassandra cluster (for 2 years now).

The costs of operating the cluster are ~5K/month (that's what our service provider charges us for 24/7 ops). I consider this a scam since averaged maintenance costs are perhaps ~1 hour per month.

(normally peaks at 40.000 writes/sec, 500 reads/sec, 200GB)

[ddorian43]

Yes, but 200GB and those read/write rates of data can reside in a single server even entirely in-memory, it's not a big amount.