Ok... so we've rebuilt the pool as 14 pairs of mirrors, each pair
having one disk in each of the two JBODs. Now we're getting about
500-1000 IOPS (according to zpool iostat) and 20-30MB/sec in random
read on a big database. Does that sounds right?
I am not sure who wrote the above text since the attribution quoting
is all botched up (Gmail?) in this thread. Regardless, it is worth
pointing out that 'zpool iostat' only reports the I/O operations which
were actually performed. It will not report the operations which did
not need to be performed due to already being in cache. A quite busy
system can still report very little via 'zpool iostat' if it has
enough RAM to cache the requested data.
Bob
--
Bob Friesenhahn
bfrie...@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/
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