Re: ZFS performance (was: Re: deduplicating file systems: VDO with Debian?)
On Wed, 2022-11-09 at 10:35 +0100, DdB wrote:
> Am 09.11.2022 um 09:24 schrieb hw:
> > > Learn more about ZFS and invest in hardware to get performance.
> > Hardware like? In theory, using SSDs for cache with ZFS should improve
> > performance. In practise, it only wore out the SSDs after a while, and now
> > it's
> > not any faster without SSD cache.
> >
> >
>
> metoo had that unpleasant experience of a worn out SSD that had been
> used as a ZFS cache and zil device. After that, my next comp got huge
> amounts of ECC-RAM, freeing up the SSD for the OS and stuff.
I don't have anything without ECC RAM, and my server was never meant for ZFS.
> Also i did
> change the geometry of the main pool to a collection of mirrors (much
> faster than raid) and left the raid only on the slower backup server.
But then you have less capacity ...
> Due to snapshots and increments, i am now backing up only once in 2
> weeks, which takes somewhat around 1 hour bcoz of a slow connection. But
> i am satisfied with zfs performance from spinning rust, if i dont fill
> up the pool too much, and defrag after a while ... ;-)
With mirroring, I could fit only one backup, not two.
In any case, I'm currently tending to think that putting FreeBSD with ZFS on my
server might be the best option. But then, apparently I won't be able to
configure the controller cards, so that won't really work. And ZFS with Linux
isn't so great because it keeps fuse in between.
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