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GPFS quroum with tie-breaker disks

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Operating Systems AIX GPFS quroum with tie-breaker disks
# 1  
Old 04-25-2012
GPFS quroum with tie-breaker disks
I read from gpfs implementation guide about node quorum with tie-breaker disks:

Quote:
Node quorum with tiebreaker disks: Node quorum with tiebreaker disks allows you to run with as little as one quorum node available as long as you have access to a majority of the quorum disks
In my testing environment, I have 4 AIX as quorum nodes, each node connected to 3 GPFS disks. All the 3 disks are configured to be tie-breaker disks.
Then, I disconnect the network of 2 nodes, and then all gpfs file systems failed.

According to the quoted text, the file system should work as long as only 1 quorum is available. Can anyone kindly help to teach me the behavior of node quorum with tie-breaker disks?

Thanks!
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LEARN ABOUT CENTOS

votequorum_overview

VOTEQUORUM_OVERVIEW(8)				    Corosync Cluster Engine Programmer's Manual 			    VOTEQUORUM_OVERVIEW(8)

NAME

       votequorum_overview - Votequorum Library Overview

OVERVIEW

       The  votequorum library is delivered with the corosync project. It is the external interface to the vote-based quorum service. This service
       is optionally loaded into all nodes in a corosync cluster to avoid split-brain situations. It  does  this  by  having  a  number  of  votes
       assigned  to  each system in the cluster and ensuring that only when a majority of the votes are present, cluster operations are allowed to
       proceed.

       The library provides a mechanism to:

       * Query the quorum status

       * Get a list of nodes known to the quorum service

       * Receive notifications of quorum state changes

       * Change the number of votes assigned to a node

       * Change the number of expected votes for a cluster to be quorate

       * Connect an additional quorum device to allow small clusters to remain quorate during node outages.

BUGS

       No known bugs at the time of writing. The authors are from outerspace. Deal with it.

SEE ALSO

       corosync-quorumtool(8), votequorum(5), votequorum_initialize(3), votequorum_finalize(3),  votequorum_getinfo(3),  votequorum_trackstart(3),
       votequorum_trackstop(3),   votequorum_fd_get(3),  votequorum_dispatch(3),  votequorum_context_set(3),  votequorum_context_get(3),  votequo-
       rum_setexpected(3), votequorum_setvotes(3)

corosync Man Page						    2012-01-12						    VOTEQUORUM_OVERVIEW(8)