[PVE-User] any recommendation for SSD for ceph journal disk/SSD?

[dejan]

I read somewhere that Sand Force controllers
are compressing the files before anything is
written to disk/memory chip. So if you are
working with large files that are not compressible
it can slow down the writes. But sure this
process can extend the lifetime of an SSD drive.
So less failures.

-
Dejan

On Wed, Aug 1, 2012 at 10:46 AM, Massimo Santoro <massimo at tuxel.com> wrote:
> On 30/07/2012 13:06, Martin Maurer wrote:
>
> Hi all,
>
>
>
> we are extending our testlab with a better ceph cluster and I am looking for
> the best performance/price ratio to get it running.
>
> I am thinking of single sata drives for OSD and a dedicated SSD for the
> journal.
>
>
>
> I want reliable ones but I do not want to spend money for a Intel 710
> series. Any recommendations?
>
> As we only need a few gigabytes for the journal I thinking for a Intel SSD
> 520 Series 60GB – but this one is not that fast as the 240 GB model.
>
>
>
> Any comments on this? The ceph cluster will operate only a gigabit network.
>
> Thanks,
>
>
>
> Hello Martin,
>
> we used many Intel chip based SSDs and did not have any single failure. I am
> afraid the latest ones are all based on SandForce chips though. Anyone knows
> about their failure rate?
>
> Massimo
>
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