Hi Stephen,
Thanks for replying.
I would actually be an advocate for using a proper archive_command in order to facilitate a proper (Per the documentation) PITR and backup strategy.
However, a colleague had suggested such a creative approach (Possibly, less administrative overhead, ease of maintenance? I'm not sure) and I struggled to find any evidence online in blogs/white-papers/documentation that this was a feasible approach. That said, I couldn't find any info rejecting it as a method either, which led me to post here. Essentially, this was a difference of opinion on approach, and I was looking to gather information in order to make an informed opposing argument.
My only thought now would be how could I decipher, within the sequence chain of WAL files, up to which file has the "archival" progressed to. i.e. which files are not susceptible to being called upon again for restartpoints/checkpoints. That is, where is my absolute point (or file) of archival using something along the lines of 'pg_current_xlog_location'.
Regards,
Ruan
Sent: 30 October 2017 16:41:11
To: Rhhh Lin
Cc: pgsql-general@xxxxxxxxxxxxxx
Subject: Re: Backup strategy using 'wal_keep_segments'
* Rhhh Lin (ruanlinehan@xxxxxxxxxxx) 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
