Re: [Xen-users] iSCSI Volumes and Xen

["Fajar A. Nugraha" <fajar@xxxxxxxxx>]

On Thu, Jan 14, 2010 at 9:07 PM, Matthew Law <matt@xxxxxxxxxxxxxxxxxx> wrote:
> Reading this thread suggests that exporting each volume as a block device
> results in poor performance, correct?

Where does it say that? It should be just fine if you import the iscsi
share on dom0.

>  I had wanted to use zvols for the
> nice snapshot features of ZFS (it is useful to take snapshots of a running
> zvol) but not at the cost of a serious performance hit.  I need to use
> pvgrub in my domUs, too.

Actually, if you use opensolaris, the performance hit will come for
the forced sync-io on opensolaris side to ensure data consistency.
Using SSD as ZIL on opensolaris side should help a lot.

-- 
Fajar

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