> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss- > boun...@opensolaris.org] On Behalf Of Alexander Lesle > > at Dezember, 17 2010, 17:48 <Lanky Doodle> wrote in [1]: > > > By single drive mirrors, I assume, in a 14 disk setup, you mean 7 > > sets of 2 disk mirrors - I am thinking of traditional RAID1 here. > > > Or do you mean 1 massive mirror with all 14 disks? > > Edward means a set of two-way-mirrors.
Correct. mirror disk0 disk1 mirror disk2 disk3 mirror disk4 disk5 ... You would normally call this a stripe of mirrors. Even though the ZFS concept of striping is more advanced than traditional raid striping... We still call this a ZFS stripe for lack of any other term. A ZFS stripe has all the good characteristics of raid concatenation and striping, without any of the bad characteristics. It can utilize bandwidth on multiple disks when it wants to, or use a single device when it wants to for small blocks. It can dynamically add randomly sized devices, and it can be done one-at-a-time. Gaining everything good of traditional raid stripe or concatenation, without any of the negatives of traditional raid stripe and concatenation. > At Sol11 Express Oracle announced that at TestInstall you can set > RootPool to mirror during installation. At the moment I try it out > in a VM but I didnt find this option. :-( Actually, even in solaris 10, I habitually install the root filesystem onto a ZFS mirror. You just select 2 disks, and it's automatically a mirror. > zpool create lankyserver mirror vdev1 vdev2 mirror vdev3 vdev4 > > When you need more space you can expand a bundle of two disks to your > lankyserver. Each pair with the same capacity is effective. > > zpool add lankyserver mirror vdev5 vdev6 mirror vdev7 vdev8 ... Correct. _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
