Number of OSD map versions

[George Mihaiescu <lmihaiescu@xxxxxxxxx>]

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@xxxxxxxxxxxxxx
http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com