[OpenIndiana-discuss] ZFS pool layout - request for opinion

[Jonathan Adams]

2x 256GB + 2x(2x4TB) , 256GB in the root pool, 8Tb in the datapool.

However, when we got to 6 servers with the same configuration it was deemed
to be wasteful on rpools (not to mention electricity and management costs),
especially since they weren't being used for live storage, only for backup,
so we created a new storage array, 6x4x4TB hot-plug disks, 2 SSD internal
raid, dual LSI 16 port controllers ... but in that case most of the pools
are 2x4TB mirrored, (12 pools of 4TB) but since they're archiving physical
servers at 12 sites, and most of them have ~2TB mirrored at each we should
be fine.

Ooh that was a long sentence.

Trouble with that configuration is that it's an all eggs in one basket
issue, so we had to have a second one off-site that clones the original,
looks a lot nicer than 6 towers though.

Jon


On 26 February 2014 10:47, Stefan Müller-Wilken <
stefan.mueller-wilken at acando.de> wrote:

> Disks are cheaper than data - that is indeed true. So you're putting data
> into a four-time mirrored configuration? Or RAIDZ-1 or RAIDZ-2?
>
> The question is more of maximum capacity. If you're dedicating two disks
> to the root pool, you're left with max. 4 4TB disks for the rest -
> effectively wasting >6TB of potential space. Booting RAIDZ pools is not
> possible, right? If it was, you could put all six disks in one large RAIDZ
> and cut rpool and data out of that, no?
>
> Cheers
>  Stefan
> ________________________________________
> Von: Jonathan Adams [t12nslookup at gmail.com]
> Gesendet: Mittwoch, 26. Februar 2014 10:30
> An: Discussion list for OpenIndiana
> Betreff: Re: [OpenIndiana-discuss] ZFS pool layout - request for opinion
>
> Basically the same thing in our 6 disk systems.
>
> We generally have 2 256Gb disks in the mirrored root pool, and 4 4Tb disks
> mirrored in the "datapool" ... but disks are cheap overall, compared to
> your data.
>
> Jon
>
>
>
> On 26 February 2014 08:06, Stefan Müller-Wilken <
> stefan.mueller-wilken at acando.de> wrote:
>
> > Dear all,
> >
> > one thing I stumble over again and again is ZFS pool layout for 6 disk
> > servers (e.g. 1 HU ProLiants) . What I do so far is reserving disk 1 & 2
> > for the rpool mirror and put disks 3 - 6 into a RAIDZ-1 data pool. I
> don't
> > really like this layout as it means wasting a lot of space on the rpool
> > while having only minimal redundancy for data. What do others do to
> combine
> > space efficiency with bootability and redundancy?
> >
> > Cheers
> >  Stefan
> >
> > ________________________________
> > Acando GmbH, Millerntorplatz 1, 20359 Hamburg, Germany | Geschäftsführer:
> > Guido Ahle | Amtsgericht Hamburg, HRB 76048 | Ust.Ident-Nr.:DE208833022
> > _______________________________________________
> > OpenIndiana-discuss mailing list
> > OpenIndiana-discuss at openindiana.org
> > http://openindiana.org/mailman/listinfo/openindiana-discuss
> >
> _______________________________________________
> OpenIndiana-discuss mailing list
> OpenIndiana-discuss at openindiana.org
> http://openindiana.org/mailman/listinfo/openindiana-discuss
>
> ________________________________
> Acando GmbH, Millerntorplatz 1, 20359 Hamburg, Germany | Geschäftsführer:
> Guido Ahle | Amtsgericht Hamburg, HRB 76048 | Ust.Ident-Nr.:DE208833022
>
> _______________________________________________
> OpenIndiana-discuss mailing list
> OpenIndiana-discuss at openindiana.org
> http://openindiana.org/mailman/listinfo/openindiana-discuss
>