Re: Unhappy Cluster

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OOH Thanks!  I'll certainly give that a try.

On Fri, Sep 8, 2023 at 7:50 PM Alexander E. Patrakov <patrakov@xxxxxxxxx> wrote:
>
> Hello Dave,
>
> I think your data is still intact. Nautilus, indeed, had issues when recovering erasure-coded pools. You can try temporarily setting min_size to 4. This bug has been fixed in Octopus or later releases. From the release notes at https://docs.ceph.com/en/latest/releases/octopus/:
>
>> Ceph will allow recovery below min_size for Erasure coded pools, wherever possible.
>
>
>
> On Sat, Sep 9, 2023 at 5:58 AM Dave S <bigdave.schulz@xxxxxxxxx> wrote:
>>
>> Hi Everyone,
>> I've been fighting with a ceph cluster that we have recently
>> physically relocated and lost 2 OSDs during the ensuing power down and
>> relocation. After powering everything back on we have
>>              3   incomplete
>>              3   remapped+incomplete
>> And indeed we have 2 OSDs that died along the way.
>> The reason I'm contacting the list is that I'm surprised that these
>> PGs are incomplete.  We're running Erasure coding with K=4, M=2 which
>> in my understanding we should be able to lose 2 OSDs without an issue.
>> Am I mis-understanding this or does m=2 mean you can lose m-1 OSDs?
>>
>> Also, these two OSDs happened to be in the same server (#3 of 8 total servers).
>>
>> This is an older cluster running Nautilus 14.2.9.
>>
>> Any thoughts?
>> Thanks
>> -Dave
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>
>
>
> --
> Alexander E. Patrakov
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