[OpenIndiana-discuss] Very slow write performance on a 3 disk raidz1-0 zpool

[Julius Roberts]

On 24 August 2012 20:49, Sašo Kiselkov <skiselkov.ml at gmail.com> wrote:
> So let me get this straight, you've got a 2TB dataset with dedup and
> compression on a machine with 1GB of RAM and you're complaining about
> poor performance? This is *expected* behavior. Your DDT simply doesn't
> fit into RAM

I understood it would be slow, but not this slow.  I've installed 6GB RAM
into this machine and it's working ALOT better now.

$ zpool iostat Backups 5
               capacity     operations    bandwidth
pool        alloc   free   read  write   read  write
----------  -----  -----  -----  -----  -----  -----
Backups     2.19T   546G     41    384  2.15M  2.22M
Backups     2.19T   546G     85    901  6.49M  8.41M
Backups     2.19T   546G     85    913  6.49M  9.00M
^C

Thanks for your help everybody.

-- 
Kind regards, Jules

<golgy> whats so wrong with plumb?
<hoolio> nothing, in itself.  it's just for me, knowing what it means
infers i cannot any longer pretend to not be a complete square when it
comes to computers
<Gryphon> I don't know that knowing anything about plumb turns you into a
nerd, but this conversation already has
<hoolio> are you calling me nerdy?
<checkers> hoolio: you know what initramfs means, AND does. You're lost to
the non-geek world already
<Gryphon> yes
<hoolio> hrm
<hoolio> goodbye cruel world.