Re: [Xen-users] Shared Storage

[Jonathan Tripathy <jonnyt@xxxxxxxxxxx>]

On 25/04/2011 14:27, John Madden wrote:
> On 04/24/2011 04:24 PM, Jonathan Tripathy wrote:
> > Well, I'm very familiar with LVM and shrinking and extending LVs and
> > filesystems. Been doing this for ages.
> >
> > I would like to use openfiler, however I'd like to script this, so maybe
> > Linux is still the best option?
> >
> > And just to confirm, Linux iSCSI will be ok with hundreds of LUNs?
> > Assume network and spindle hardware is ok.
> If you can serve the LUNs to the box, you'll be fine.  But keep in 
> mind the 256-per-target/channel limit inherent to SCSI.  And why you'd 
> want to manage hundreds of disks instead of hundreds of LV's is beyond 
> me -- management at the LVM layer is a lot easier than duplicating the 
> work of disk labeling, multipathing, etc.
> Oh, and with hundreds of VMs, the spindle will always be your bottleneck.
>
> John
Hi John,

I would honestly prefer to manage hundred of LVs instead of hundreds of 
LUNs. I'm just concerned about the iSCSI bottleneck (if any) if I were 
to create an LVM VG using a single iSCSI LUN for about 50 - 100 LVs. Any 
advice is appreciated.
Thanks

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