[Discuss] Backing up the entire filesystem

[Derek Atkins]

Hi,

Shirley Márquez Dúlcey <mark at buttery.org> writes:

> Another thing to keep in mind is that ZFS does have one flaw; it's a
> memory hog. If you have a large ZFS filesystem you will need a LOT of
> RAM to get acceptable performance. But it does represent the current
> state of the art for file system data integrity.

I think current standard is 1GB RAM per TB of disk, or 5GB/TB if you
have dedup turned on.

> I have to allow that my only experience with ZFS to date is with
> FreeNAS, which is based on FreeBSD. I have moved all my bulk data
> storage to a pair of NAS boxes and have a relatively small amount of
> local space on each computer. FreeNAS does not use ZFS for the system
> volume.

Eh?  My FreeNAS system uses ZFS on the boot disk?

-derek
-- 
       Derek Atkins, SB '93 MIT EE, SM '95 MIT Media Laboratory
       Member, MIT Student Information Processing Board  (SIPB)
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