Re: [ceph-users] Number of OSD map versions
Thanks Dan, I'll use these ones from Infernalis: [global] osd map message max = 100 [osd] osd map cache size = 200 osd map max advance = 150 osd map share max epochs = 100 osd pg epoch persisted max stale = 150 George On Mon, Nov 30, 2015 at 4:20 PM, Dan van der Ster wrote: > I wouldn't run with those settings in production. That was a test to > squeeze too many OSDs into too little RAM. > > Check the values from infernalis/master. Those should be safe. > > -- > Dan > On 30 Nov 2015 21:45, "George Mihaiescu" wrote: > >> Hi, >> >> I've read the recommendation from CERN about the number of OSD maps ( >> https://cds.cern.ch/record/2015206/files/CephScaleTestMarch2015.pdf, >> page 3) and I would like to know if there is any negative impact from these >> changes: >> >> [global] >> osd map message max = 10 >> >> [osd] >> osd map cache size = 20 >> osd map max advance = 10 >> osd map share max epochs = 10 >> osd pg epoch persisted max stale = 10 >> >> >> We are running Hammer with nowhere closer to 7000 OSDs, but I don't want >> to waste memory on OSD maps which are not needed. >> >> Are there are large production deployments running with these or similar >> settings? >> >> Thank you, >> George >> >> >> ___ >> 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
Re: [ceph-users] Number of OSD map versions
I wouldn't run with those settings in production. That was a test to squeeze too many OSDs into too little RAM. Check the values from infernalis/master. Those should be safe. -- Dan On 30 Nov 2015 21:45, "George Mihaiescu" wrote: > Hi, > > I've read the recommendation from CERN about the number of OSD maps ( > https://cds.cern.ch/record/2015206/files/CephScaleTestMarch2015.pdf, page > 3) and I would like to know if there is any negative impact from these > changes: > > [global] > osd map message max = 10 > > [osd] > osd map cache size = 20 > osd map max advance = 10 > osd map share max epochs = 10 > osd pg epoch persisted max stale = 10 > > > We are running Hammer with nowhere closer to 7000 OSDs, but I don't want > to waste memory on OSD maps which are not needed. > > Are there are large production deployments running with these or similar > settings? > > Thank you, > George > > > ___ > 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
[ceph-users] Number of OSD map versions
Hi, I've read the recommendation from CERN about the number of OSD maps ( https://cds.cern.ch/record/2015206/files/CephScaleTestMarch2015.pdf, page 3) and I would like to know if there is any negative impact from these changes: [global] osd map message max = 10 [osd] osd map cache size = 20 osd map max advance = 10 osd map share max epochs = 10 osd pg epoch persisted max stale = 10 We are running Hammer with nowhere closer to 7000 OSDs, but I don't want to waste memory on OSD maps which are not needed. Are there are large production deployments running with these or similar settings? Thank you, George ___ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
