Re: Understanding Ceph in case of a failure

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Hi,

Am 20.03.2017 um 05:34 schrieb Christian Balzer:
> you do realize that you very much have a corner case setup there, right?

Yes, I know that this is not exactly a recommendation, but I hoped it
would be good enough for the start :-).

> That being said, if you'd search the archives, a similar question was
> raised by me a long time ago.

Do you have some sort of reference to this? Sounds interesting, but
couldn't find a particular thread, and you posted quite a lot on this
list already :-).

> The new CRUSH map of course results in different computations of where PGs
> should live, so they get copied to their new primary OSDs.
> This is the I/O you're seeing and that's why it stops eventually.

Hm, ok, that might be an explanation. Haven't considered the fact that
it gets removed from the CRUSH map and a new location is calculated. Is
there a way to prevent this in my case?

Thank you very much for your insights!

Best regards,
Karol Babioch

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