Re: OSD behavior, in case of its journal disk (either HDD or SSD) failure

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As far as i know you will not lose data, but it will be unaccessable untill you bring the journal back online.

2016-01-25 16:23 GMT+02:00 Daniel Schwager <Daniel.Schwager@xxxxxxxx>:
Hi,
> ok...OSD stop. Any reason why OSD stop ( I assume if journal disk
> fails, OSD should work as no journal. Isn't it?)

No. In my understanding - if a journal fails, all the attached (to this Journal HDD) OSD's fails also.

E.g. if you have 4 OSD's with the 4 journals's located on one SSD-hard disk, the failure of this SSD
will crash/fail also your 4 OSD's.

regards
Danny


>
> Not understand, why the OSD data lost. You mean - data lost during the
> traction time? or total OSD data lost?
>
> Thanks
> Swami
>
> On Mon, Jan 25, 2016 at 7:06 PM, Jan Schermer <jan@xxxxxxxxxxx> wrote:
> > OSD stops.
> > And you pretty much lose all data on the OSD if you lose the journal.
> >
> > Jan
> >
> >> On 25 Jan 2016, at 14:04, M Ranga Swami Reddy <swamireddy@xxxxxxxxx> wrote:
> >>
> >> Hello,
> >>
> >> If a journal disk fails (with crash or power failure, etc), what
> >> happens on OSD operations?
> >>
> >> PS: Assume that journal and OSD is on a separate drive.
> >>
> >> Thanks
> >> Swami
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> >
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