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Subject: Re: ZFS in production enviroments
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From: dennis berger <db@nipsi.de>
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Date: Fri, 5 Apr 2013 13:00:42 +0200
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To: Mark Felder <feld@feld.me>
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Thanks for the setup information.
If you have time may you describe your head units a little bit?
How do you configure istgt + zfs for iscsi volumes. On our system I =
often see a lot of IOPS when I write to an exported zvol.=20
Maybe this is due to wrong blocksize config in istgt.
I don't see those high IOPS in NFS exported volumes for example.

Best,
-dennis

Am 04.04.2013 um 14:46 schrieb Mark Felder:

> Our setup:
>=20
> * FreeBSD 9-STABLE (from before 9.0-RELEASE)
> * HP DL360 servers acting as "head units"
> * LSI SAS 9201-16e controllers
> * Intel NICs
> * DataOn Storage DNS-1630 JBODs with dual controllers (LSI based)
> * 2TB 7200RPM Hitachi SATA HDs with SAS interposers (LSISS9252)
> * Intel SSDs for cache/log devices
> * gmultipath is handling the active/active data paths to the drives. =
ex: ZFS uses multipath/disk01 in the pool
> * istgt serving iSCSI to Xen and ESXi from zvols
>=20
> Built these just before the hard drive prices spiked from the floods. =
I need to jam more RAM in there and it would be nice to be running =
FreeBSD 10 with some of the newer ZFS code and having access to TRIM. =
Uptime on these servers is over a year.
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