Hi, under http://eu.ceph.com/docs/wip-rpm-doc/config-cluster/rbd-config-ref/ I found a good description about RBD cache parameters. But, I am missing information - by whom these parameters are evaluated and - when will this happen ? My assumption: - the rbd_cache* parameter will be read by MONs - rbd.ko will contact MON during 'insmod' or during 'open /dev/rbd*' and get the rbd_cache info Please confirm / correct. Can I change the parameter only via ceph.conf + restart of MONs, or can I change rbd_cache on runtime? e.g. # ceph --admin-daemon /var/run/ceph/ceph-mon.0.asok config show | grep rbd_cache "rbd_cache": "false", "rbd_cache_writethrough_until_flush": "false", "rbd_cache_size": "33554432", "rbd_cache_max_dirty": "25165824", "rbd_cache_target_dirty": "16777216", "rbd_cache_max_dirty_age": "1", "rbd_cache_block_writes_upfront": "false", # ceph mon tell 0 injectargs '--rbd_cache true' # ceph --admin-daemon /var/run/ceph/ceph-mon.0.asok config show | grep rbd_cache "rbd_cache": "true", "rbd_cache_writethrough_until_flush": "false", "rbd_cache_size": "33554432", "rbd_cache_max_dirty": "25165824", "rbd_cache_target_dirty": "16777216", "rbd_cache_max_dirty_age": "1", "rbd_cache_block_writes_upfront": "false", Regards, -Dieter _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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