Hello Matthew, Friday, October 13, 2006, 5:37:45 PM, you wrote:
MA> Robert Milkowski wrote: >> Hello Richard, >> >> Friday, October 13, 2006, 8:05:18 AM, you wrote: >> >> REP> Do you want data availability, data retention, space, or performance? >> >> data availability, space, performance >> >> However we're talking about quite a lot of small IOs (r+w). MA> Then you should seriously consider using mirrors. 'coz of space requirements that's not possible. I hope RAID-Z will do. >> The real question was what do you think about creating each raid group >> only from disks from different controllers so controller failure won't >> affect data availability. MA> On thumper, where the controllers (and cables, etc) are integrated into MA> the system board, controller failure is extremely unlikely. These MA> controllers are much more reliable than your traditional SCSI card in a MA> PCI slot. In fact, most controller "failures" are due to SCSI bus MA> negotiation problems (confused devices, bad cables, etc), which simply MA> don't exist in the point-to-point (ie. SCSI, SAS) world. So I wouldn't MA> worry very much about spreading across controllers for the sake of MA> controller failure. That's a good point. -- Best regards, Robert mailto:[EMAIL PROTECTED] http://milek.blogspot.com _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
