Re: Backup strategy using 'wal_keep_segments'

From: Stephen Frost <sfrost(at)snowman(dot)net>
To: Rhhh Lin <ruanlinehan(at)hotmail(dot)com>
Cc: "pgsql-general(at)postgresql(dot)org" <pgsql-general(at)postgresql(dot)org>
Subject: Re: Backup strategy using 'wal_keep_segments'
Date: 2017-10-30 16:41:11
Message-ID: 20171030164111.GF4628@tamriel.snowman.net
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Greetings,

* Rhhh Lin (ruanlinehan(at)hotmail(dot)com) wrote:
> A colleague recently suggested that instead of implementing an 'archive_command' to push archivable WALs to a secondary location (for further backup to tape for example), we could instead persist the WAL files in their current location by setting the "wal_keep_segments" parameter to an extreme value e.g. 1000 and have the 'archive_command' do nothing.

Michael's points are good and I wouldn't recommend using this archive
command either, but what isn't clear to me is what you're actaully
trying to solve by using such a method..? You haven't said anywhere
what's wrong with archive_command (I know that there certainly are some
things wrong with it, of course, but there are solutions to a number of
those issues that isn't a hack like this ...).

Thanks!

Stephen

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