Hello Greg,
Wednesday, February 11, 2009, 10:13:39 PM, you wrote:
GM> We're using some X4540s, with OpenSolaris 2008.11.
GM> According to my testing, to optimize our systems for our specific
GM> workload, I've determined that we get the best performance with the
GM> write cache disabled on every disk, and with zfs:zfs_nocacheflush=1 set
GM> in /etc/system.
GM> The only issue is setting the write cache permanently, or at least quickly.
GM> Right now, as it is, I've scripted up format to run on boot, disabling
GM> the write cache of all disks. This takes around two minutes. I'd like to
GM> avoid needing to take this time on every bootup (which is more often
GM> than you'd think, we've got quite a bit of construction happening, which
GM> necessitates bringing everything down periodically). This would also be
GM> painful in the event of unplanned downtime for one of our Thors.
GM> so, basically, my question is: Is there a way to quickly or permanently
GM> disable the write cache on every disk in an X4540?
Are you sure thar write cache is back on after restart?
--
Best regards,
Robert
http://milek.blogspot.com
_______________________________________________
zfs-discuss mailing list
zfs-discuss@opensolaris.org
http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
