On Tue, 15 Feb 2011 14:53:42 GMT, Paul Vixie said:
on the strength of observations made by somebody else here recently, i tried moving my mail store from ZFS to UFS. scan results for +inbox, ~4000 messages. UFS (3Ware mirror): 0.114u 0.076s 0:00.21 85.7% 138+1461k 1+0io 0pf+0w
ZFS (raidz2): 0.440u 1.273s 0:33.47 5.1% 143+1507k 0+0io 0pf+0w
my sleepycat version is no faster than the UFS numbers above. apparently i have been the victim of "zfs fragmentation".
00.21 versus 33.47? I'd really investigate hot/cold cache effects there. If you "just" moved it to UFS, a copy is probably still in cache. Any way to flush the in-memory file cache on your box and try again?
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