On Jul 30, 2009, at 2:04 PM, Ross wrote:
Supermicro AOC-SAT2-MV8, based on the Marvell chipset. I figured it
was the best available at the time since it's using the same chipset
as the x4500 Thumper servers.
Our next machine will be using LSI controllers, but I'm still not
entirely happy with the way ZFS handles timeout type errors. It
seems that it handles drive reported read or write errors fine, and
also handles checksum errors, but it's completely missed drive
timeout errors as used by hardware raid controllers.
Personally, I feel that when a pool usually responds to requests in
the order of milliseconds, a timeout of even a tenth of a second is
too long. Several minutes before a pool responds is just a joke.
ZFS doesn't have timeouts, at least not in the context you are
referring.
A tenth of a second is way too short, by at least 2 orders of magnitude.
I'm still a big fan of ZFS, and modern hardware may have better
error handling, but I can't help but feel this is a little short
sighted.
Did you miss the memo? Likely, because it was buried in b97 head's up
list. PSARC 2008/465 Improved [s]sd-config-list support.
http://arc.opensolaris.org/caselog/PSARC/2008/465/mail
Note iSCSI tuning is different and "fixed" in b121, via PSARC 2009/369
iSCSI initiator tunables.
http://arc.opensolaris.org/caselog/PSARC/2009/369/mail
-- richard
_______________________________________________
zfs-discuss mailing list
zfs-discuss@opensolaris.org
http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
