Well, as the doc said: > Set or clear the pause flags in the OSD map. If set, no IO requests will be > sent to any OSD. Clearing the flags via unpause results in resending pending > requests. If you do that on a production cluster, that means your cluster will no longer be in production :)
Depending on your needs, but .. Maybe you want do this operation as fast as possible Or maybe you want to make that operation as transparent as possible, from a user point of view You may have a look at osd_recovery_op_priority & osd_client_op_priority, they might be interesting for you On 02/01/2017 14:37, Matteo Dacrema wrote: > Hi All, > > what happen if I set pause flag on a production cluster? > I mean, will all the request remain pending/waiting or all the volumes > attached to the VMs will become read-only? > > I need to quickly upgrade placement group number from 3072 to 8192 or better > to 165336 and I think doing it without client operations will be much faster. > > Thanks > Regards > Matteo > > > > > _______________________________________________ > ceph-users mailing list > [email protected] > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > _______________________________________________ ceph-users mailing list [email protected] http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
