Folks, I used your link to calculate PGs and i did following. Total OSD: 14 Replica: 3 Total Pools: 2 ( Images & vms) In %Data i gave 5% to images & 95% to vms (openstack) https://ceph.com/pgcalc/ It gave me following result vms - 512 PG images - 16 PG For safe side i set vms 256 PG is that a good idea because you can increase pg but you can't reduce PG so i want to start with smaller and later i have room to increase pg, i just don't want to commit bigger which cause other performance issue, Do you think my approach is right or i should set 512 now On Fri, Aug 10, 2018 at 9:23 AM, Satish Patel <satish.txt@xxxxxxxxx> wrote: > Re-sending it, because i found my i lost membership so wanted to make > sure, my email went through > > On Fri, Aug 10, 2018 at 7:07 AM, Satish Patel <satish.txt@xxxxxxxxx> wrote: >> Thanks, >> >> Can you explain about %Data field in that calculation, is this total data >> usage for specific pool or total ? >> >> For example >> >> Pool-1 is small so should I use 20% >> Pool-2 is bigger so I should use 80% >> >> I'm confused there so can you give me just example how to calculate that >> field? >> >> Sent from my iPhone >> >> On Aug 9, 2018, at 4:25 PM, Subhachandra Chandra <schandra@xxxxxxxxxxxx> >> wrote: >> >> I have used the calculator at https://ceph.com/pgcalc/ which looks at >> relative sizes of pools and makes a suggestion. >> >> Subhachandra >> >> On Thu, Aug 9, 2018 at 1:11 PM, Satish Patel <satish.txt@xxxxxxxxx> wrote: >>> >>> Thanks Subhachandra, >>> >>> That is good point but how do i calculate that PG based on size? >>> >>> On Thu, Aug 9, 2018 at 1:42 PM, Subhachandra Chandra >>> <schandra@xxxxxxxxxxxx> wrote: >>> > If pool1 is going to be much smaller than pool2, you may want more PGs >>> > in >>> > pool2 for better distribution of data. >>> > >>> > >>> > >>> > >>> > On Wed, Aug 8, 2018 at 12:40 AM, Sébastien VIGNERON >>> > <sebastien.vigneron@xxxxxxxxx> wrote: >>> >> >>> >> The formula seems correct for a 100 pg/OSD target. >>> >> >>> >> >>> >> > Le 8 août 2018 à 04:21, Satish Patel <satish.txt@xxxxxxxxx> a écrit : >>> >> > >>> >> > Thanks! >>> >> > >>> >> > Do you have any comments on Question: 1 ? >>> >> > >>> >> > On Tue, Aug 7, 2018 at 10:59 AM, Sébastien VIGNERON >>> >> > <sebastien.vigneron@xxxxxxxxx> wrote: >>> >> >> Question 2: >>> >> >> >>> >> >> ceph osd pool set-quota <poolname> max_objects|max_bytes <val> >>> >> >> set object or byte limit on pool >>> >> >> >>> >> >> >>> >> >>> Le 7 août 2018 à 16:50, Satish Patel <satish.txt@xxxxxxxxx> a écrit >>> >> >>> : >>> >> >>> >>> >> >>> Folks, >>> >> >>> >>> >> >>> I am little confused so just need clarification, I have 14 osd in >>> >> >>> my >>> >> >>> cluster and i want to create two pool (pool-1 & pool-2) how do i >>> >> >>> device pg between two pool with replication 3 >>> >> >>> >>> >> >>> Question: 1 >>> >> >>> >>> >> >>> Is this correct formula? >>> >> >>> >>> >> >>> 14 * 100 / 3 / 2 = 233 ( power of 2 would be 256) >>> >> >>> >>> >> >>> So should i give 256 PG per pool right? >>> >> >>> >>> >> >>> pool-1 = 256 pg & pgp >>> >> >>> poo-2 = 256 pg & pgp >>> >> >>> >>> >> >>> >>> >> >>> Question: 2 >>> >> >>> >>> >> >>> How do i set limit on pool for example if i want pool-1 can only >>> >> >>> use >>> >> >>> 500GB and pool-2 can use rest of the space? >>> >> >>> _______________________________________________ >>> >> >>> ceph-users mailing list >>> >> >>> ceph-users@xxxxxxxxxxxxxx >>> >> >>> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >>> >> >> >>> >> >>> >> _______________________________________________ >>> >> ceph-users mailing list >>> >> ceph-users@xxxxxxxxxxxxxx >>> >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >>> > >>> > >> >> _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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