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It says it is a very intensive process and can affect cluster performance. Our Version is Luminous 12.2.2 And we are using erasure coding profile for a pool 'ecpool' with k=5 and m=3 Current PG number is 256 and it has about 20 TB of data. Should I increase it gradually? Or set pg as 512 in one step ? Karun Josy On Tue, Jan 2, 2018 at 9:26 PM, Hans van den Bogert <hansbog...@gmail.com> wrote: > Please refer to standard documentation as much as possible, > > http://docs.ceph.com/docs/jewel/rados/operations/ > placement-groups/#set-the-number-of-placement-groups > > Han’s is also incomplete, since you also need to change the ‘pgp_num’ as > well. > > Regards, > > Hans > > On Jan 2, 2018, at 4:41 PM, Vladimir Prokofev <v...@prokofev.me> wrote: > > Increased number of PGs in multiple pools in a production cluster on > 12.2.2 recently - zero issues. > CEPH claims that increasing pg_num and pgp_num are safe operations, which > are essential for it's ability to scale, and this sounds pretty reasonable > to me. [1] > > > [1] https://www.sebastien-han.fr/blog/2013/03/12/ceph-change > -pg-number-on-the-fly/ > > 2018-01-02 18:21 GMT+03:00 Karun Josy <karunjo...@gmail.com>: > >> Hi, >> >> Initial PG count was not properly planned while setting up the cluster, >> so now there are only less than 50 PGs per OSDs. >> >> What are the best practises to increase PG number of a pool ? >> We have replicated pools as well as EC pools. >> >> Or is it better to create a new pool with higher PG numbers? >> >> >> Karun >> >> _______________________________________________ >> ceph-users mailing list >> ceph-users@lists.ceph.com >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >> >> > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > >
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