Re: pg_basebackup --incremental
I'm certain this is all in the User Guide:
$ grep -rh archive $PGDATA/postgresql.conf*
archive_mode = on
#archive_command = '/bin/true'
archive_command = 'pgbackrest --stanza=nfs archive-push %p'
archive_mode = on
#archive_command = '/bin/true'
archive_command = 'pgbackrest --stanza=nfs archive-push %p'
Since changing archive_mode requires a restart, but changing archive_command just requires a reload, it's useful to have both of those archive_command lines in your config. Always keep "archive_mode = on" but disable it by setting archive_command to /bin/true (which will be a rare occurrence).
On Wed, Oct 29, 2025 at 1:40 PM Sam Stearns <sam.stearns@dat.com> wrote:
Hi Ron,If I may, please. What are the postgres.conf parameters you set specifically for pgBackRest?Thanks,SamOn Tue, Oct 28, 2025 at 3:21 PM Sam Stearns <sam.stearns@dat.com> wrote:Thanks, Ron! We'll take another look at pgBackRest.On Tue, Oct 28, 2025 at 10:52 AM Ron Johnson <ronljohnsonjr@gmail.com> wrote:This Message Is From an External SenderThis message came from outside your organization.On Tue, Oct 28, 2025 at 1:43 PM Sam Stearns <sam.stearns@dat.com> wrote:Howdy,We're running version 17.6. Would anyone be able to point me to, or provide, some sample use cases / scripts / usage to deploy a pg_basebackup full + --incremental strategy as a backup solution, please?The question confuses me a bit (though maybe because weekly "full", and remainder "incremental" is pretty standard). PgBackRest really is quite simple and easy to configure if you back up to a local mount point (even when that mount point is NFS).This is in the "postgres" crontab:15 01 * * Sun Type=full; pgbackrest backup --stanza=nfs --type=$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}.logAnd 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--Death to <Redacted>, and butter sauce.Don't boil me, I'm still alive.<Redacted> lobster!--Samuel Stearns
Team Lead - Database
c: 971 762 6879 | o: 971 762 6879 | DAT.com--Samuel Stearns
Team Lead - Database
c: 971 762 6879 | o: 971 762 6879 | DAT.com
Death to <Redacted>, and butter sauce.
Don't boil me, I'm still alive.
<Redacted> lobster!
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