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jyavenard said:One note however, the iozone benchmarks are useless here, especially the read speed.
All it is showing is that the data is in RAM or CPU cache...
It's not useless, considering the bulk of our data will be in the ARC, and it's mostly reads to compare the data to what's on the remote servers. Plus, the transfer from one backup server to the other is all reads. Also, since the servers are on UPSes, and the RAID controllers have batteries, all the caches are configured as write-back, so as soon as data hits one of the caches, it's considered "written to disk".
A more valid test would be:
[cmd=]iozone -R -a -i 0 -i 1 -i 2 -g <size> -f <testfile> -b <excelfile>[/cmd]
I'll see if I can run the above, for comparison. However, I'm off on holidays starting tomorrow, so it won't be until after the 13th that I'll be able to try this.