[pgpool-hackers: 3335] Re: [pgpool-committers: 5790] pgpool: Second part for duplicate failover reque

Tatsuo Ishii ishii at sraoss.co.jp
Thu May 30 19:46:13 JST 2019


Are you going to add new parameter for this?  I vaguely recall that we
agreed to add a new parameter for this in a telephone discussion.

Best regards,
Tatsuo Ishii
SRA OSS, Inc. Japan
English: http://www.sraoss.co.jp/index_en.php

From: Muhammad Usama <m.usama at gmail.com>
Subject: [pgpool-committers: 5790] pgpool: Second part for [pgpool-hackers: 3295] duplicate failover reque
Date: Sun, 26 May 2019 21:37:58 +0000
Message-ID: <E1hV0q6-0000rS-OH at gothos.postgresql.org>

> Second part for [pgpool-hackers: 3295] duplicate failover request ...fix
> As per the discussion on the thread [pgpool-hackers: 3295] we came to the
> conclusion, that the master watchdog node should resign from master
> responsibilities if the primary backend node gets into quarantine state on that.
> The commit implements the said behaviour by making the master/coordinator watchdog
> node resign from its status if it fails to get the consensus for the quarantined
> primary node failover, with in FAILOVER_COMMAND_FINISH_TIMEOUT(15) seconds.
> When the watchdog master resigns, because of quarantined primary node its
> wd_priority is decreased to (-1), so that it should get the least preference
> in the next election for the master/coordinator node selection. And once the
> election is concluded the wd_priority for the node gets restored to the
> original configured value.
> In case of failed consensus for standby node failover no action is taken.
> Branch
> ------
> master
> Details
> -------
> https://git.postgresql.org/gitweb?p=pgpool2.git;a=commitdiff;h=33df0d33df1ce701f07fecaeef5b87a2707c08f2
> Modified Files
> --------------
> src/watchdog/watchdog.c | 47 +++++++++++++++++++++++++++++++++++++++++++++--
> 1 file changed, 45 insertions(+), 2 deletions(-)

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