I have used MongoDB(2.4) and Aerospike 3 in our production systems. These are the few observation found by our team :-
1)Read/Write throughput by Aerospike is unbeatable. Usually Mongo db works up to certain scale if read requests are at higher side. If you need concurrent read/write as 95/5 percent ratio, Mongo degrades like anything. With Aerospike we have seen very little impact even if this ratio is 90/10. On AWS we have achieved 200k TPS using Aerospike.
2)In Aerospike latency is very low. Read latency was sub-millisecond for 99 percentile at server side. Write latency was sub-millisecond for 80 percentile and within 8ms for 100 percentile. Best thing was that we got almost similar number in different POC, so consistent performance.
3)Very few nodes are sufficient in Aerospike cluster compare to other solutions. Also SSD based data store gives quite impressive numbers, so very cost effective and little maintenance overhead.
4)Now Aerospike is open source, so hope for wider community support :-)
So we are using Aerospike for all the new systems and trying to migrate from MongoDB.
