[SSI-devel] [ ssic-linux-Bugs-935298 ] Need split brain avoidance

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Bugs item #935298, was opened at 2004-04-14 16:31
Message generated for change (Comment added) made by nobody
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Category: Miscellaneous
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: David B. Zafman (dzafman)
Assigned to: Nobody/Anonymous (nobody)
Summary: Need split brain avoidance

Initial Comment:

While doing testing, I ended up causing the node 1 the
CLMS master kernel to loop with interrupts disabled (or
something which caused it not to handle node monitoring
activity).  Node 2 declared node 1 down and took over
the root filesystem.  Node 1 finished its bad activity
and declared node 2 down because node 2 wasn't sending
IMALIVE anymore.

Now that we are getting into HA failover clusters with
shared disks, we need some kind of split-brain
avoidance mechanism.

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Comment By: Nobody/Anonymous (nobody)
Date: 2004-04-15 13:38

Message:
Logged In: NO 

Maybe we can require serial null modem cable and possibly
secondary network connection and use STONITH and heartbeat
algorithms to detect split brain.

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