[Pacemaker] transitional memberships

[Alan Jones]

It appears from the code in lib/ais/plugin.c:pcmk_peer_update() that
Pacemaker ignores
transitional membership updates from Corosync.  It is my understanding that
this information
tells you which members have maintained synchronized state during
transitions.  For example,
view AB on both A and B followed by B alone on B followed by ABC on A would
be proceeded
by a transitional membership to exclude B on A to let A know that B is no
longer in sync.  Is it
safe to ignore these messages?  How is the CIB replicated?
Alan
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