Hi,
i am a beginner in pacemaker and in the process of understanding it
better. its usage on openais stack. while reading about cluster properties i
came across this problem "clsuter amnesia". i am not sure this problem exists
in Pacemaker ( i dont have setup right now to experiment this :( )
i am aware that when a node in a Pacemaker(on openais) has its configuration
updated locally it is synchronized on all nodes of that cluster. and read in
Pacemaker documentation that whenever a node joins cluster asks the node with
the highest (admin_epoch, epoch,num_updates) tuple to replace the
configuration on all the nodes. i understood this is the case when nodes are
online.
cluster amnesia is basically on a two node cluster (node A, node B), if node
A is down and node B is up.. and on node B we add 2 new resources (make
someother config change) and save the configuration. next we bring node B
down. now when we start node A it comes up with old configuration ( it missed
newly added 2 resources on node B).
i would like to understand whether this problem exists with with pacemaker?
or some solution already exists in Pacemaker to take care of this problem?
i tried to search the forum with keyword "amnesia" couldn't get any results
am going to experiment this once i get setup in two days.
thanks in advance
chajo
_______________________________________________
Pacemaker mailing list: Pacemaker@oss.clusterlabs.org
http://oss.clusterlabs.org/mailman/listinfo/pacemaker
Project Home: http://www.clusterlabs.org
Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
Bugs: http://developerbugs.linux-foundation.org/enter_bug.cgi?product=Pacemaker
