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2011 May 12
1
Slow reading speed over RDMA
...th the performance parameters, setting up
more or less cache and io-threads, but the results did not improve.
Moreover, I have tested all the suggested optimization hacks/parameters with
little change in the results.
A little more insight on the setup: we have 24 HD machines, with dual Xeon
CPUs, 16GByte of RAM, working over an Areca RAID card, using JBOD, all boxes
connected via 10Gbit/s Infiniband. The CPUs are far from being maxed out
(top reports around 50% idle), as is the network.
I'm using CentOS 5.5 on all the machines. Let me know if you need more
information on what's going on (c...