Suboptimal performance iSCSI/MPIO

QNAP NAS solution for server virtualization and clustering/HA/FT

Suboptimal performance iSCSI/MPIO

Postby arthur@sinke.biz » Thu Mar 01, 2012 4:59 pm

Hi,

I'm using a TS879 with SSD disks to connect to a XenServer using the setup as described in this article:
http://files.qnap.com/news/pressresourc ... Server.pdf

I'm using two Intel E1000PT server adapters connected to a managed GB switch to create the dedicated storage network.
Both QNAP NIC's are not trunked and connected to this storage network.
I have assigned to separate VLAN's each with no Default GW assigned.

All checks look okay, MPIO enabled, 2 available iSCSI sessions and so on. However the performance i'm getting seems to be limited to the capacity of only a single link (about 100MByte/s).

Here's the multipath output on from the xenserver (I have 3 storage repositories/ iSCSI disks configured)

Is there someone available who can help me with the correct setup?

Regards,

Arthur

36001405888010a2deff3d447dd9f8edb dm-3 QNAP,iSCSI Storage
[size=32T][features=0][hwhandler=0][rw]
\_ round-robin 0 [prio=2][active]
\_ 7:0:0:0 sde 8:64 [active][ready]
\_ 6:0:0:0 sdd 8:48 [active][ready]
3600140504482908d3f18d4461d8a97da dm-5 QNAP,iSCSI Storage
[size=32T][features=0][hwhandler=0][rw]
\_ round-robin 0 [prio=2][active]
\_ 9:0:0:0 sdg 8:96 [active][ready]
\_ 8:0:0:0 sdf 8:80 [active][ready]
3600140540d96272d88add40f7d8714d0 dm-0 QNAP,iSCSI Storage
[size=500G][features=0][hwhandler=0][rw]
\_ round-robin 0 [prio=2][active]
\_ 5:0:0:0 sdc 8:32 [active][ready]
\_ 4:0:0:0 sdb 8:16 [active][ready]
arthur@sinke.biz
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