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webtest
2012 Mar 02
2
Write performance in a replicated/distributed setup with KVM?
...ingle-digit MB/s performance which isn't really what
I had expected. I know that the write has to go to at least two (?) nodes at
the same time, but still?
A single scp of a 1GB file from a node to another gives something like
~100MBps.
A copy of a virtual image took 17 minutes;
# time cp debtest.raw /gluster/debtest.img
real 17m36.727s
user 0m1.832s
sys 0m14.081s
# ls -lah /gluster/debtest.img
-rw------- 1 root root 20G Mar 1 12:35 /gluster/debtest.img
# du -ah /gluster/debtest.img
4.5G /gluster/debtest.img
I noted that the processlist shows that direct-io-mode is disabled. Default
sh...