| From: | Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com> |
|---|---|
| To: | Robert Haas <robertmhaas(at)gmail(dot)com> |
| Cc: | Simon Riggs <simon(at)2ndquadrant(dot)com>, Fujii Masao <masao(dot)fujii(at)gmail(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Alvaro Herrera <alvherre(at)commandprompt(dot)com>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: Re: [COMMITTERS] pgsql: Make CheckRequiredParameterValues() depend upon correct |
| Date: | 2010-04-29 13:07:03 |
| Message-ID: | 4BD98477.6080109@enterprisedb.com |
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| Lists: | pgsql-committers pgsql-hackers |
Robert Haas wrote:
> How about this one? The administrator sets up a master and a slave.
> She's heard about this new Hot Standby feature and so decides to
> enable it on the slave just to play around with it. Subsequently, she
> takes a better job at another company and they hire a new
> administrator, who thinks the Hot Standby WAL may be causing a
> performance problem on the master, so he switches wal_mode to archive.
> Six months later the primary fails.
Umm, I don't see the problem. For high availability purposes, the
standby works just as well with wal_mode='archive'. Or are you saying
that the standby was configured with recovery_connections='on', and
failed to start for those six months because hot standby could not be
enabled, and no-one noticed?
--
Heikki Linnakangas
EnterpriseDB http://www.enterprisedb.com
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