Re: [zfs-discuss] future ZFS Boot and ZFS copies

2007-10-09 Thread Matthew Ahrens
Jesus Cea wrote: Read performance [when using zfs set copies=2 vs a mirror] would double, and this is very nice I don't see how that could be the case. Either way, the reads should be able to fan out over the two disks. --matt ___ zfs-discuss

Re: [zfs-discuss] future ZFS Boot and ZFS copies

2007-10-09 Thread Matthew Ahrens
Jesus Cea wrote: Would ZFS boot be able to boot from a copies boot dataset, when one of the disks are failing?. Counting that ditto blocks are spread between both disks, of course. You can not boot from a pool with multiple top-level vdevs (eg, the copies pool you describe). We hope to

[zfs-discuss] future ZFS Boot and ZFS copies

2007-10-03 Thread Jesus Cea
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 I know that first release of ZFS boot will be support single disk and mirroring configurations. With ZFS copies support in Solaris 10 U5 (I hope), I was wondering about breaking my current mirror and using both disks in stripe mode, protecting the

Re: [zfs-discuss] future ZFS Boot and ZFS copies

2007-10-03 Thread Darren J Moffat
Jesus Cea wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 I know that first release of ZFS boot will be support single disk and mirroring configurations. With ZFS copies support in Solaris 10 U5 (I hope), I was wondering about breaking my current mirror and using both disks in stripe

Re: [zfs-discuss] future ZFS Boot and ZFS copies

2007-10-03 Thread Jesus Cea
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Darren J Moffat wrote: Why would you do that when it would reduce your protection and ZFS boot can boot from a mirror anyway. I guess ditto blocks would be protection enough, since the data would be duplicated between both disks. Of course,

Re: [zfs-discuss] future ZFS Boot and ZFS copies

2007-10-03 Thread Moore, Joe
Jesus Cea wrote: Darren J Moffat wrote: Why would you do that when it would reduce your protection and ZFS boot can boot from a mirror anyway. I guess ditto blocks would be protection enough, since the data would be duplicated between both disks. Of course, backups are your friend.

Re: [zfs-discuss] future ZFS Boot and ZFS copies

2007-10-03 Thread Darren J Moffat
Moore, Joe wrote: It would be really nice if there was some sort of enforced-ditto-separation (fail w/ device full if unable to satisfy) but that doesn't exist currently. How would that be different to a mirror ? I guess it is different to a mirror because only some datasets in the pool