Thanks! Subhachandra On Fri, Aug 10, 2018 at 6:01 PM, Subhachandra Chandra <schandra@xxxxxxxxxxxx> wrote: > The % should be based on how much of the storage you expect that pool to > take up out of total available. 256PGs with Replication 3 will distribute > themselves as 256 * 3 / 14 which will be about 54 per OSD. For the smaller > pool 16 seems too low. You can go with 32 and 256 if you want lower number > of PGs in the vms pool and expand later. The calculator recommends 32 and > 512 for your settings. > > Subhachandra > > > > > On Fri, Aug 10, 2018 at 8:43 AM, Satish Patel <satish.txt@xxxxxxxxx> wrote: >> >> 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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