Hi.
On 01.06.16 02:49, Freddie Cash wrote:
> On Tue, May 31, 2016 at 11:18 AM, Eugene M. Zheganin
> mailto:e...@norma.perm.ru>>wrote:
>
> I wat to start using HAST, I have two nodes and a pair of disk on
> each node. So I want to use HASt in an environment where each HAST
> resource would be mirrored. What is the preferred approach if I
> want to use ZFS on an end-device to avoid exsessive fscking, and,
> in the same time, I want to have some redundancy on a block level
> ? I see two possibility: HAST on a zvol of a mirrored pool, and a
> ZFS on a hast. But recently I heard that nested zfs (like zfs on
> zvol) is clamed unsupported. Futhermore, I have zfs on a geli on a
> zvol, and this solution proved itself to be very affected to
> livelocking - when disk i/o on a such fs is above some treshold,
> system is locking, and the only way out is to reset it. Should I
> chose geom_mirror to provide a device for HAST and the build ZFS
> on it ?
>
>
> The generally recommend way to do this is to create a HAST resource
> out of 1 disk from each system, and then build the ZFS pool using the
> HAST resources as the "disks".
>
> That way, your ZFS pool is made up of 2 HAST devices in a mirror vdev.
>
> And each of the two HAST devices uses one disk from each server (total
> of four disks).
>
>
>
>
But I don't need two HAST devices, I need one, but redundant on each server.
Eugene.
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