[pgpool-general: 2431] Re: watchdog quorum
ishii at postgresql.org
Thu Jan 16 11:00:51 JST 2014
> On Thu, 16 Jan 2014 00:35:40 +0400
> Sergey Arlashin <sergeyarl.maillist at gmail.com> wrote:
>> Does watchdog have any sort of quorum mechanism (like corosync/pacemaker has) in order to avoid "split brains"?
> Watchdog doesn't have quorum with voting like pacemaker. Another mechanism to
> avoid split-brain is trusted_servers. When a pgpool has some network problem
> and cannot ping to any host in trusted_servers, the pgpool goes to down and
> cannot become active.
Additional notes. In Pacemaker it is recommended to not use the quorum
mechanism if the number of nodes is 2. So if you plan to have only 2
pgpool nodes, it does not matter if pgpool employs the quorum
mechanism or not.
SRA OSS, Inc. Japan
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