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Re: [Xen-users] iSCSI Volumes and Xen

from [John Madden]

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To:	"matt@xxxxxxxxxxxxxxxxxx" <matt@xxxxxxxxxxxxxxxxxx>
Subject:	Re: [Xen-users] iSCSI Volumes and Xen
From:	John Madden <jmadden@xxxxxxxxxxx>
Date:	Thu, 14 Jan 2010 09:22:38 -0500
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Reading this thread suggests that exporting each volume as a block device
results in poor performance, correct?  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.

Keep in mind that snapshots are not backups. There's no way thatsnapshot would be consistent unless you were also doing something on thedomU to stop and flush all i/o and clear the scsi caches.


John



--
John Madden
Sr UNIX Systems Engineer
Ivy Tech Community College of Indiana
jmadden@xxxxxxxxxxx

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Re: [Xen-users] iSCSI Volumes and Xen, (continued) Re: [Xen-users] iSCSI Volumes and Xen, Pasi Kärkkäinen Re: [Xen-users] iSCSI Volumes and Xen, Nick Couchman RE: [Xen-users] iSCSI Volumes and Xen, Joseph Coleman Re: [Xen-users] iSCSI Volumes and Xen, Pasi Kärkkäinen Re: [Xen-users] iSCSI Volumes and Xen, Simon Hobson RE: [Xen-users] iSCSI Volumes and Xen, Jeff Sturm RE: [Xen-users] iSCSI Volumes and Xen, Simon Hobson RE: [Xen-users] iSCSI Volumes and Xen, Matthew Law Re: [Xen-users] iSCSI Volumes and Xen, Fajar A. Nugraha Re: [Xen-users] iSCSI Volumes and Xen, Matthew Law Re: [Xen-users] iSCSI Volumes and Xen, John Madden <= Re: [Xen-users] iSCSI Volumes and Xen, Matthew Law Re: [Xen-users] iSCSI Volumes and Xen, Pasi Kärkkäinen Re: [Xen-users] iSCSI Volumes and Xen, John Madden RE: [Xen-users] iSCSI Volumes and Xen, Nathan Eisenberg RE: [Xen-users] iSCSI Volumes and Xen, Jeff Sturm Re: [Xen-users] iSCSI Volumes and Xen, Fajar A. Nugraha Re: [Xen-users] iSCSI Volumes and Xen, Matthew Law RE: [Xen-users] iSCSI Volumes and Xen, James Harper RE: [Xen-users] iSCSI Volumes and Xen, Nick Couchman Re: [Xen-users] iSCSI Volumes and Xen, Pasi Kärkkäinen

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