[OmniOS-discuss] High Availability storage with ZFS

[Linda Kateley]

I thought it was stmsboot and mpathadm on omni? If you are just looking 
for multipathing to disk? Haven't tried on omni.





On 1/6/15 11:28 AM, Schweiss, Chip wrote:
> On Tue, Jan 6, 2015 at 5:16 AM, Filip Marvan <filip.marvan at aira.cz 
> <mailto:filip.marvan at aira.cz>> wrote:
>
>     Hi
>
>     as few guys before, I'm thinking again about High Availability
>     storage with ZFS. I know, that there is great commercial RSF-1,
>     but that's quite expensive for my needs.
>
>     I know, that Sašo did a great job about that on his blog
>     http://zfs-create.blogspot.cz but I never found the way, how to
>     successfully configure that on current OmniOS versions.
>
>     So I'm thinking about something more simple. Arrange two LUNs from
>     two OmniOS ZFS storages in one software mirror through
>     fibrechannel. Arrange that mirror in client, for example mdadm in
>     Linux. I know, that it will have performance affect and I will
>     lost some ZFS advantages, but I still can use snapshots, backups
>     with send/receive and some other interesting ZFS things, so it
>     could be usable for some projects.
>
>     Is there anyone, who tried that before? Any eperience with that?
>
>
> While this sounds technically possible, it is not HA. Your client is 
> the single point of failure.   I would wager that mdadm would create 
> more availability issues than it would be solving.
>
> I run RSF-1 and HA is still hard to achieve.   I don't think I have 
> gained any additional up-time overcoming failures, but it definitely 
> helps with planned maintenance.   Unfortunately, there are still too 
> many ways a zfs pool can fail that having a second server connected 
> does not help.
>
> -Chip
>
>     Thank you,
>
>     Filip Marvan
>
>
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