> One thing I am at a loss to understand is why turning off the disk > caches when testing the JBOD performance produced almost identical (very > slightly better) results. Perhaps it was a case of the ZFS internal > cache making the disks cache redundant? Comparing to the ARECA > passthrough (where the areca cache is used) shows again, similar results. > > -D > _______________________________________________ > [email protected] mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-fs > To unsubscribe, send any mail to "[email protected]"
My guess is it probably has to do with the way ZFS does cache flushes: http://www.solarisinternals.com/wiki/index.php/ZFS_Evil_Tuning_Guide#Cache_Flushes It might be worth it to disable the forced flushing and test again, if you feel like it. -Koen _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hardware To unsubscribe, send any mail to "[email protected]"
