On 09/18/2012 04:31 PM, Eugen Leitl wrote:
> I'm currently thinking about rolling a variant of
> http://www.napp-it.org/napp-it/all-in-one/index_en.html
> with remote backup (via snapshot and send) to 2-3
> other (HP N40L-based) zfs boxes for production in
> our organisation. The systems themselves would
> be either Dell or Supermicro (latter with ZIL/L2ARC
> on SSD, plus SAS disks (pools as mirrors) all with 
> hardware pass-through).
> The idea is to use zfs for data integrity and
> backup via data snapshot (especially important
> data will be also back-up'd via conventional DLT
> tapes).
> Before I test thisi --
> Is anyone using this is in production? Any caveats?

Well, obviously nobody has used a setup *exactly* like yours in
production. That being said, I fail to see any obvious problems with it.
The HP N40L boxes are wonderful for backup purposes, since they can
easily push >1Gbit/s in ZFS throughput with a very small footprint.

> Can I actually have a year's worth of snapshots in
> zfs without too much performance degradation?

Each additional dataset (not sure about snapshots, though) increases
boot times slightly, however, I've seen pools with several hundred
datasets without any serious issues, so yes, it is possible. Be
prepared, though, that the data volumes might be substantial (depending
on your overall data turn-around per unit time between the snapshots).

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