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[Xen-users] Best Practices for PV Disk IO?

  • To: xen-users@xxxxxxxxxxxxxxxxxxx
  • From: Christopher Chen <muffaleta@xxxxxxxxx>
  • Date: Mon, 20 Jul 2009 17:26:15 -0700
  • Delivery-date: Mon, 20 Jul 2009 17:26:52 -0700
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  • List-id: Xen user discussion <xen-users.lists.xensource.com>

I was wondering if anyone's compiled a list of places to look to
reduce Disk IO Latency for Xen PV DomUs. I've gotten reasonably
acceptable performance from my setup (Dom0 as a iSCSI initiator,
providing phy volumes to DomUs), at about 45MB/sec writes, and
80MB/sec reads (this is to a IET target running in blockio mode).

As always, reducing latency for small disk operations would be nice,
but I'm not sweating it. I just wondering if anyone's experienced
similar behavior, and if they've found ways to improve performance.



Chris Chen <muffaleta@xxxxxxxxx>
"The fact that yours is better than anyone else's
is not a guarantee that it's any good."
-- Seen on a wall

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