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FreeNAS 9.1 iSCSI target performance

U

UncleDavid218

2[H]4U
Joined
Jan 16, 2006
Messages
2,734
All,

I've just setup a couple of ZFS volumes and set them up as iSCSI targets connecting to a 2008 R2 virtual server for backup purposes. The volumes are as follows:

3x 3TB drives in RAIDZ
2x 2TB drives in RAID1

I am only seeing 20MB/s write speeds to the disks. This seems pretty poor to me.

The server has 8GB of ECC RAM and dual quad core E5405s with a gigabit network connection.

Is there any optimization to be done with this or is FreeNAS just less than ideal for iSCSI?
 
freebsd's iscsi sucks, but that seems a bit low unless you're using realtek NICs in which case ... realtek sucks ... but 20MB/s is a bit low for realtek too.

do a local benchmark using bonnie or iozone or something like that. its possible your drives are just slower than shit though.
 
They're Seagate ST3000s and the NIC is a 82563EB (well there's 2 but I don't have teaming setup) so I don't *think* either of those would be the bottleneck. This motherboard (Intel S5000VSA) only has SATA-2 ports but still should be OK. I'll run some benchmarks and see what I come up with.

Thanks for the help.
 
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