Hi Yannick, Just to be sure I understand the restriction; with the clariion you are limited in host side volume management so that basically you use single luns with ufs filesystems on them and if you need additional space in the ufs filesystem the only option is to resize the lun on the clarion, rewrite the vtoc on the lun and then growfs? That seems like a significant limitation, especially in a very dynamic storage centric environment. Just curious, any idea how much performance suffers on the host if write coelesing is unusable?
Regards, Vic On 8/7/07, Yannick Mercier <[EMAIL PROTECTED]> wrote: > From a storage administrator perspective, when doing capacity planning > on a EMC Clariion Unit, it becomes a pain to have more than one LUN > for the same volume. The Clariion with Navisphere agent gives the > storage administrator more visibility in the storage management > interface, showing mountpoints on the hosts for each Luns > The EMC CLariion Storage best practices recommends to use one LUN per volume > The write coelesing feature may be unusable if using more than one lun > per volume if striped in ZFS > > Yannick > > On 8/7/07, Victor Engle <[EMAIL PROTECTED]> wrote: > > I can understand lun expansion capability being an issue with more a > > traditional volume manager or even a single lun but with pooled > > storage and the ability to expand the pool, benefiting all filesystems > > in the pool it seems a shame to consider lun expansion a show stopper. > > > > Even so, having all the details automated and transparent to the > > administrator would be very cool. > > > > Regards, > > Vic > > > > > > On 8/7/07, George Wilson <[EMAIL PROTECTED]> wrote: > > > I'm planning on putting back the changes to ZFS into Opensolaris in > > > upcoming weeks. This will still require a manual step as the changes > > > required in the sd driver are still under development. > > > > > > The ultimate plan is to have the entire process totally automated. > > > > > > If you have more questions, feel free to drop me a line. > > > > > > Thanks, > > > George > > > > > > Yan wrote: > > > > Hey David > > > > might I need to track the evolution of that size-change utility to ZFS > > > > could I have a contact at Sun that would be able to give me more > > > > information on that ? > > > > Being able to resize LUNS dynamically Is a reality here, I currently do > > > > it with UFS after a EMC Clariion LUN Migration to a larger LUN > > > > > > > > That is our current show-stopper to using ZFS > > > > thanks > > > > Yannick > > > > > > > > > > > > This message posted from opensolaris.org > > > > _______________________________________________ > > > > zfs-discuss mailing list > > > > zfs-discuss@opensolaris.org > > > > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss > > > _______________________________________________ > > > zfs-discuss mailing list > > > zfs-discuss@opensolaris.org > > > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss > > > > > > _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
