RE: [Xen-users] iSCSI and LVM

["James Harper" <james.harper@xxxxxxxxxxxxxxxx>]

> 
> In the case of iSCSI you would just create an iSCSI device for each LV
instead
> of running lvm on top of your iSCSI volume.
> 
> James
> 
>
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------
> ---
> 
> Does that not mean that I would have to export nearly 600 LUNs?
> 

If you have 600 lv's then yes, and that may well be a better option.
With 600 lv's all running on the same vg, clvm performance if
snapshotting was ever implemented would suck terribly - every time the
lv was written to and the snapshot received a copy of the original
block, all other nodes would need to know about the new metadata change
or they would read bad data from the snapshot.

I don't know what the per-iSCSI-LUN overhead is vs the clvm overhead
though... I guess it depends on how many nodes you have.

James


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