Upgrading pgBackRest

Upgrading pgBackRest from v1 to v2

Upgrading from v1 to v2 is fairly straight-forward. The repository format has not changed and all non-deprecated options from v1 are accepted, so for most installations it is simply a matter of installing the new version.

However, there are a few caveats:

• The deprecated thread-max option is no longer valid. Use process-max instead.
• The deprecated archive-max-mb option is no longer valid. This has been replaced with the archive-push-queue-max option which has different semantics.
• The default for the backup-user option has changed from backrest to pgbackrest.
• In v2.02 the default location of the pgBackRest configuration file has changed from /etc/pgbackrest.conf to /etc/pgbackrest/pgbackrest.conf. If /etc/pgbackrest/pgbackrest.conf does not exist, the /etc/pgbackrest.conf file will be loaded instead, if it exists.

Many option names have changed to improve consistency although the old names from v1 are still accepted. In general, db-* options have been renamed to pg-* and backup-*/retention-* options have been renamed to repo-* when appropriate.

PostgreSQL and repository options must be indexed when using the new names introduced in v2, e.g. pg1-host, pg1-path, repo1-path, repo1-type, etc.

Upgrading pgBackRest from v2.x to v2.y

Upgrading from v2.x to v2.y is straight-forward. The repository format has not changed, so for most installations it is simply a matter of installing binaries for the new version. It is also possible to downgrade if you have not used new features that are unsupported by the older version.