Re: [HPDD-discuss] zfs on linux and lustre

On Thu, Oct 16, 2014 at 09:26:59PM +0000, Dilger, Andreas wrote: > On 2014/10/16, 9:10 AM, "Kurt Strosahl" <strosahl(a)jlab.org&gt; wrote: > > >Good Morning, > > > > Has anyone out there been using zfs as the back end for lustre? I am > >curious as to how you set up raid-z when setting up an ost. > > Two options exist: > - specify raidz/raidz2 on mkfs.lustre command line (see man page): > > mkfs.lustre {other opts} --ost --backfstype=zfs mypool/testfs-OST0000 \ > raidz2 /dev/sd[a-j] raidz2 /dev/sd[k-t] raidz2 /dev/sd[u-z] > /dev/sda[a-d] > > would, for example, create three RAID-Z2 VDEVs with 10 disks each. Of > course the use of /dev/sd* device names is frowned upon in real life ZFS > usage, but are shorter for this example. > > - create RAID-Z/Z2 datasets normally, then just point mkfs.lustre at them: > > mkfs.lustre {other opts} --ost --backfstype=zfs mypool/testfs-OST0000 > > IIRC you have to disable automatic mounting on the pool (legacy mode). The xattr=sa option is also needed, for performance at least, if the dataset is not created by mkfs.lustre. -Isaac _______________________________________________ HPDD-discuss mailing list HPDD-discuss(a)lists.01.org https://lists.01.org/mailman/listinfo/hpdd-discuss