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pgbackrest concerns and doubts.

From
Ajay Pratap
Date:
Hello,
I am using Postgresql 10 and pgbackrest 2.18 version on centos 7.6
I have few doubts regard pgbackrest.
a) what is the log rotation policy for pgbackrest logs. I see it logs on default path /var/log/pgbackrest/<stanzaname>-<operation>.log  what is the log rotation policy of each logs.
use case: if i am writing a script to parse the logs and gatter some info, i should be aware of log rotation or if logs doesn't rotate a single file could be huge to parse.
Or should I simply use logrotate


b) since pgbackrest takes physical backup,
 what are the impact if I upgrades minor postgres version(10.5 to 10.10)
and impact on postgres major version(10.10 to 12.X)


Thanks and regards,

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Re: pgbackrest concerns and doubts.

From
David Steele
Date:
Hi Ajay,

On 12/2/19 1:52 AM, Ajay Pratap wrote:

> I am using Postgresql 10 and pgbackrest 2.18 version on centos 7.6
> I have few doubts regard pgbackrest.
> a) what is the log rotation policy for pgbackrest logs. I see it logs on 
> default path /var/log/pgbackrest/<stanzaname>-<operation>.log  what is 
> the log rotation policy of each logs.
> use case: if i am writing a script to parse the logs and gatter some 
> info, i should be aware of log rotation or if logs doesn't rotate a 
> single file could be huge to parse.
> Or should I simply use /logrotate/

pgBackRest does not have any built-in log rotation policies since this 
is best implemented per OS.  Some packages have logrotate scripts and 
others don't.  RHEL doesn't, but you can see a logrotate example in the 
Debian/Ubuntu package at: 
https://salsa.debian.org/postgresql/pgbackrest/blob/master/debian/pgbackrest.logrotate

> b) since pgbackrest takes physical backup,
>   what are the impact if I upgrades minor postgres version(10.5 to 10.10)
> and impact on postgres major version(10.10 to 12.X)

Minor PostgreSQL upgrades require no special action in pgBackRest.  We 
test with each minor upgrade to ensure there are no regressions.  Unless 
you have a specific reason not to, it is always best to be running the 
most recent PostgreSQL minor version.

Major version upgrades will require a pgBackRest stanza-upgrade to be 
run after the PostgreSQL upgrade is complete.  For more information see: 
https://pgbackrest.org/user-guide-centos7.html#upgrade-stanza.

Regards,
-- 
-David
david@pgmasters.net