Manoj Joseph writes:
 > Matt B wrote:
 > > Any thoughts on the best practice points I am raising? It disturbs me
 > > that it would make a statement like "don't use slices for
 > > production".
 > 
 > ZFS turns on write cache on the disk if you give it the entire disk to 
 > manage. It is good for performance. So, you should use whole disks when 
 > ever possible.
 > 

Just a small clarification to state that the extra
performance  that comes from having the "write cache on"
applies mostly to disks that do not have other means of
command concurrency (NCQ, CTQ). With NCQ/CTQ, the write
cache setting should not matter much to ZFS performance.

-r

 > Slices work too, but write cache for the disk will not be turned on by zfs.
 > 
 > Cheers
 > Manoj
 > _______________________________________________
 > zfs-discuss mailing list
 > zfs-discuss@opensolaris.org
 > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss

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