MongoDB and Aerospike are not done for the same data management, as SQL is not dead too.
We have done cache systems with sharded clusters on Mongodb with TokuMX version (2.0.0 based on Mongodb 2.4.10), system is still running well with only 0,1% of queries taking more than 100ms on 65 millions queries per day and about 10 millions updates per day.
We're now trying Aerospike wich seem's to be great and now open-source.
There is only one problem with this open-source version,
DON'T USE IT IN PRODUCTION SERVERS !
The security management is only available in Enterprise distribution. It means that
YOU CAN NOT SECURE ANYTHING WITH PASSWORD AND USER !
Now, if you don't mind, you can use it on production, but don't remember any of your client can ask for a security audit and then you'll have to pay a lot.
