On Sat, 13 Apr 2019 at 06:54, Paul Emmerich <paul.emmerich@xxxxxxxx> wrote:
>
> Please don't use an EC pool with 2+1, that configuration makes no sense.
That's too much of an irony given that (2, 1) is default EC profile,
described in CEPH documentation in addition.
> 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
Well, my primary concern wasn't about min_size at all but about this: {
> > 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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