Re: [Xen-users] Storage alternatives

["PCextreme B.V. - Wido den Hollander" <wido@xxxxxxxxxxxx>]

Hi,

Let me drop into this discussion.

I have been running iSCSI on the dom0 for about 2 years now and that
works fine.

Making your iSCSI Target High Available can be done by using DRBD and
Heartbeat, i have written a small howto (in Dutch), if you would to have
this, contact me.

Failovers on the iSCSI Target side go without notice of the domU, on the
dom0 you get a iSCSI connection error, but that's it.

This whole setup can be created with Open-iSCSI, iSCSI Enterprise
Target, DRBD and Heartbeat.

-  
Met vriendelijke groet,

Wido den Hollander
Hoofd Systeembeheer / CSO
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On Fri, 2009-03-13 at 09:37 -0400, John Madden wrote:
> > I think that we would have to reboot each domU in this case after a 
> > failure, isn't it? The goal is to have domUs which would not be affected 
> > by failure of one storage servers.
> 
> Ideally, the initiator in dom0 would handle the failover of the target
> successfully and domU would never know anything had happened.  I've done
> things like entirely restart the target daemon without initiators
> caring, but if it's gone long enough while i/o is going on, bad things
> will happen.
> 
> > > Abstract your disks and iscsi exports; then use ZFS on two pools this will
> > > minimize the administration. 
> > 
> > ZFS seems to be very nice, but sadly we are not using Solaris and don't 
> > want to use it with FUSE under Linux. Nevertheless does anyone use ZFS 
> > under Linux and can share his/her experiences?
> 
> I wouldn't pay too much attention to the ZFS fanboi's anyway.  It's does
> good things but hardly anything truly useful that you can't find in LVM
> and doesn't really change anything in this case.
> 
> John
> 
> 
>

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