Cyrus & ZFS performance

[Dale Ghent]

On Jul 3, 2007, at 7:05 PM, Vincent Fox wrote:

> I just thought to report back to the list, that ZFS is working out  
> well.
>
> I asked a while ago about other's opinions, and got all thumbs up.
>
> We deployed a setup with Sun T2000 running Solaris 10u3 (11/06)
> and a pair of Sun 3510FC arrays mirroring in a hybrid HA RAID
> 5+1+0 setup that I can describe further if anyone cares.

Great to hear!

We (UMBC) are in the process of migrating from a uw-imap/maildir/ 
procmail/AFS, erm... menagerie... to something similar as yours (for  
~25k users) in the form of 4x X4100M2, each with a zpool comprising  
of a mirror between two se3511s on our SAN... with plenty of RAM in  
each server (12GB) to keep the ARC nice and fat. We're going to try  
for a unified MURDER setup with this.

You say you're running s10u3 (which is our base load as well) with  
ZFS compression on... right now in s10's ZFS there's a bug which  
keeps the compression ops serialized and stuck to one CPU. A fix has  
been in Nevada and will be released as part of a greater ZFS patch  
when s10u4 is released, hopefully this month. It will be interesting  
to note if your IOPs improve at all after that (there are some other  
performance improvements as well)

/dale

--
Dale Ghent
Specialist, Storage and UNIX Systems
UMBC - Office of Information Technology
ECS 201 - x51705