The email thread here : http://www.spinics.net/lists/ceph-devel/msg12226.html discusses a way of preventing multiple simultaneous clients from mapping an rbd via the legacy advisory locking scheme, along with osd blacklisting.
Is it now advisable to use the exclusive lock feature, discussed here : http://lists.ceph.com/pipermail/ceph-users-ceph.com/2015-September/004857.html ? In other words, does the exclusive lock feature automatically break the lock of any older lock holders and prevent any writes to the rbd from the older holder ? Another way to frame my question would be : what is the recommended way of preventing multiple simultaneous rbd mappings, based on the state-of-the-art in ceph? thanks in advance, - Puneet
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