Cassandra and multi-core
It seems Cassandra creates a big pile of threads for different tasks, I didn’t step into details, but I’m pretty sure it has more than 40 threads with default setting on a 2-nodes cluster. So multi core may not be a concern, as all these threads can run on different cores to fully utilize the CPU resource.
However, my tests show something really worry me – multi-node cluster performs worse than single node (due to inter-node communication I believe), and multi-cores deployment is slower than single-core deployment (this is something I don’t quite understand, may be because of L1/L2 cache?).
I need some hardware to test it as well, as VM is not that good for this kind of test. Then I suddenly recall I still have some 8-core/16G boxes in company sitting idle there, I can use one or two to do the test for sure 
Tags: cassandra, multi-core, multi-thread
Triviality | Hang | 
2010-01-18 14:29
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By Hang, 2010-01-18 @ 20:56
Those powerful machines are running really old releases of all sorts of software, I tried some workaround to get things working, but the performance is not that exciting, will try some more tests.