Thanks Jane!
I will go with 2048 PG.
Thanks,
Gagan
On Thu, May 1, 2025 at 12:49 PM Janne Johansson <icepic...@gmail.com> wrote:
> Den tors 1 maj 2025 kl 09:12 skrev gagan tiwari
> <gagan.tiw...@mathisys-india.com>:
> >
> > HI Janne,
> > Thanks for the explanation.
> >
> > So, using all 10X15 Disks on 7 OSD nodes. Number PG will be :-
> >
> > ( 10X7X100 ) / 6 = 1166.666 nearest power of 2 is 2028.
> >
> > So, I will need to set 2028 placement groups. With 2028 PG , three will
> be 12,168 pieces to be spread out on 70
> > OSDs, which will give me 173.82 per OSD. Will this be an optimal
> number ? Or this should be rounded off to 174
>
> You could still start with 1024, it will not hurt a lot to have 80 PGs
> per OSD and you can split again later (which one does after expanding
> clusters anyhow) but then again, with ssd/nvme, being closer to 200
> PGs per OSD is probably better to utilize the flash drives better. Go
> with 2048.
>
> --
> May the most significant bit of your life be positive.
>
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