I've tried opensuse domU on opensuse dom0 connected 20GB zfs volume off
FreeNAS beta using iscsi. Yes, it works normally, no cpu overload.
What is the good style of using iscsi for guests, I need to discover all
targets on all dom0 hosts and then start guest on selected machines (as
I know target can only be used once) ? How to make migration between
dom0 hosts possible ?
On Sun, Mar 01, 2009 at 05:05:23PM +0700, Fajar A. Nugraha wrote:
> On Sun, Mar 1, 2009 at 2:51 PM, Denis J. Cirulis <denis@xxxxxxxxxxxxx> wrote:
> > Dom0.
>
> That's strange. I tested domU on RHEL dom0, with storage located on
> iscsi-exported zfs volume from opensolaris, there's not much
> difference in domU CPU usage. I did notice substantial difference in
> domU I/O throughput due to the fact that I'm using 100Mbps switch
> instead of 1Gbps.
>
> What does "top" on domU say? Is the high load on "us", or is it on "sy" or
> "wa"?
> What does "iostat -x 3" on dom0 say? Is the iscsi-imported disk
> experiencing 100% util?
>
> If it IS I/O throughput problem, then iscsi, aoe, or nfs should be
> same: none of them would provide acceptable performance. If it's
> something else, then you can safely use nfs.
>
> >
> > On Sun, Mar 01, 2009 at 09:19:57AM +0700, Fajar A. Nugraha wrote:
> >> On Sun, Mar 1, 2009 at 5:00 AM, Denis J. Cirulis <denis@xxxxxxxxxxxxx>
> >> wrote:
> >> > I tried AoE and iSCSI already, software iscsi target and initiator gives
> >> > me high cpu load on both domU and target. AoE was less resource hungry.
> >>
> >> High domU CPU? Seriously? Who's importing the iscsi target, dom0 or domU?
> >
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