On Wed, 25 Mar 2015, Deneau, Tom wrote: > A couple of client-monitor questions: > > 1) When a client contacts a monitor to get the cluster map, how does it > decide which monitor to try to contact?
It picks a random monitor what the information it's seeded with at startup (via ceph.conf or the -m command line option). Once it reaches one mon, it gets the MonMap which tells it who all of the mons are. > 2) Having gotten the cluster map, assuming a client wants to do multiple > reads and writes, > does the client have to re-contact the monitor to get the latest cluster > map > for each operation? No, the mons are primarily needed for the initial startup/authentication step. They are also queried as a last resort if the client thinks it has an out of data osdmap and hasn't gotten one from an OSD, and to renew authentication tickets. sage _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
