[Lustre-discuss] Vdev Configuration on Lustre

[Indivar Nair]

Thanks Andreas,

Are there any statistics / theory on which approach would be better from a
performance perspective?
i.e. letting ZFS do the striping or Lustre do the striping

Regards,


Indivar Nair


On Tue, Jun 10, 2014 at 3:28 AM, Dilger, Andreas <andreas.dilger at intel.com>
wrote:

> This should be possible by specifying the pool configuration for
> mkfs.lustre as you do with zpool:
>
>     mkfs.lustre --backfstype zfs {other opts} {poolname/dataset} mirror
> sde sdf mirror sdg sdh
>
> There is also a bug open to improve the mkfs.lustre(8) man page to
> describe the ZFS options better:
> https://jira.hpdd.intel.com/browse/LU-2234
>
> On 2014/06/09, 1:21 PM, "Indivar Nair" <indivar.nair at techterra.in<mailto:
> indivar.nair at techterra.in>> wrote:
>
> Hi All,
>
> In Lustre, is it possible to create a zpool with multiple vdevs -
>
> E.g.:
>
> # zpool create tank mirror sde sdf mirror sdg sdh
> # zpool status
>   pool: tank
>  state: ONLINE
>  scan: none requested
> config:
>
>         NAME        STATE     READ WRITE CKSUM
>         tank        ONLINE       0     0     0
>           mirror-0  ONLINE       0     0     0
>             sde     ONLINE       0     0     0
>             sdf     ONLINE       0     0     0
>           mirror-1  ONLINE       0     0     0
>             sdg     ONLINE       0     0     0
>             sdh     ONLINE       0     0     0
>
>
> This will allow us to have a single OST per OSS, with ZFS managing the
> striping across vdevs.
>
> Regards,
>
>
> Indivar Nair
>
>
> Cheers, Andreas
> --
> Andreas Dilger
> Lustre Software Architect
> Intel High Performance Data Division
>
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