Re: pg_basebackup --incremental

On Tue, Oct 28, 2025 at 1: 43 PM Sam Stearns <sam. stearns@ dat. com> wrote: Howdy, We're running version 17. 6. Would anyone be able to point me to, or provide, some sample use cases / scripts / usage to deploy a pg_basebackup full + --incremental

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On Tue, Oct 28, 2025 at 1:43 PM Sam Stearns <sam.stearns@dat.com> wrote:

Howdy,

We're running version 17.6.  Would anyone be able to point me to, or provide, some sample use cases / scripts / usage to deploy a pg_basebackup full + --incremental strategy as a backup solution, please?

The question confuses me a bit (though maybe because weekly "full", and remainder "incremental" is pretty standard).  PgBackRest really is quite simple and easy to configure if you back up to a local mount point (even when that mount point is NFS).

This is in the "postgres" crontab:

15 01 * * Sun Type=full; pgbackrest backup --stanza=nfs --type=$Type &> logs/pgbackrest_$(date +"\%F_\%T")_${Type}.log
15 01 * * 1-6 Type=incr; pgbackrest backup --stanza=nfs --type=$Type &> logs/pgbackrest_$(date +"\%F_\%T")_${Type}.log

And this is my /etc/pgbackrest.conf:

[global]
repo1-path=/Database/backups/pgbackrest
repo1-cipher-type=aes-256-cbc
repo1-cipher-pass=<redacted>
repo1-bundle=y
repo1-bundle-limit=20MiB
repo1-bundle-size=200MiB
[nfs]
pg1-path=/Database/17/data
resume=n
start-fast=y
stop-auto=y
compress-type=zst
log-level-console=detail
log-level-file=info
log-path=/var/lib/pgsql/logs/pgbackrest
retention-full=4
process-max=<nproc * 3/4>
[nfs:archive-push]
compress-type=zst

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