Re: Does "ceph df" use "bogus" copies factor instead of (k, m) for erasure coded pool?

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Please don't use an EC pool with 2+1, that configuration makes no sense.

min_size 3 is the default for that pool, yes. That means your data
will be unavailable if any OSD is offline.
Reducing min_size to 2 means you are accepting writes when you cannot
guarantee durability which will cause problems in the long run.
See older discussions about min_size here



Paul

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Paul Emmerich

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On Fri, Apr 12, 2019 at 9:30 PM Igor Podlesny <ceph-user@xxxxxxxx> wrote:
>
> For e. g., an EC pool with default profile (2, 1) has bogus "sizing"
> params (size=3, min_size=3).
> Min. size 3 is wrong as far as I know and it's been fixed in fresh
> releases (but not in Luminous).
>
> But besides that it looks like pool usage isn't calculated according
> to EC overhead but as if it was replicated pool with size=3 as well.
>
> --
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