On 6/20/07, Torrey McMahon <[EMAIL PROTECTED]> wrote: Also, how does replication at the ZFS level use more storage - I'm assuming raw block - then at the array level? _______________________________________________
Just to add to the previous comments. In the case where you have a SAN array providing storage to a host for use with ZFS the SAN storage really needs to be redundant in the array AND the zpools need to be redundant pools. The reason the SAN storage should be redundant is that SAN arrays are designed to serve logical units. The logical units are usually allocated from a raid set, storage pool or aggregate of some kind. The array side pool/aggregate may include 10 300GB disks and may have 100+ luns allocated from it for example. If redundancy is not used in the array side pool/aggregate and then 1 disk failure will kill 100+ luns at once. On 6/20/07, Torrey McMahon <[EMAIL PROTECTED]> wrote:
James C. McPherson wrote: > Roshan Perera wrote: >> >>> But Roshan, if your pool is not replicated from ZFS' point of view, >>> then all the multipathing and raid controller backup in the world will >>> not make a difference. >> >> James, I Agree from ZFS point of view. However, from the EMC or the >> customer point of view they want to do the replication at the EMC level >> and not from ZFS. By replicating at the ZFS level they will loose some >> storage and its doubling the replication. Its just customer use to >> working with Veritas and UFS and they don't want to change their >> habbits. >> I just have to convince the customer to use ZFS replication. > > Hi Roshan, > that's a great shame because if they actually want > to make use of the features of ZFS such as replication, > then they need to be serious about configuring their > storage to play in the ZFS world.... and that means > replication that ZFS knows about. > Also, how does replication at the ZFS level use more storage - I'm assuming raw block - then at the array level? _______________________________________________ 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
