Le 21/05/2015 13:49, Ilya Dryomov a écrit :
> On Thu, May 21, 2015 at 12:12 PM, [email protected] <[email protected]> wrote:
>> Re: what's the difference between pg and pgp?
>
> pg-num is the number of PGs, pgp-num is the number of PGs that will be
> considered for placement, i.e. it's the pgp-num value that is used by
> CRUSH, not pg-num. For example, consider pg-num = 1024 and pgp-num
> = 1. In that case you will see 1024 PGs but all of those PGs will map
> to the same set of OSDs.
>
> When you increase pg-num you are splitting PGs, when you increase
> pgp-num you are moving them, i.e. changing sets of OSDs they map to.
>
> Thanks,
>
> Ilya
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>
Seems like i said a huge stupid thing ;-)
I'm gonna learn about a new feature of ceph...
I apologize
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