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