> This helps to identify the correct database server and/or backup for the > subsequent backup operations. pg_verifybackup validates the manifest system > identifier against the backup control file and fails if they don’t match. > Similarly, pg_basebackup increment backup will fail if the manifest system > identifier does not match with the server system identifier. The > pg_combinebackup is already a bit smarter -- checks the system identifier > from > the pg_control of all the backups, with this patch the manifest system > identifier also validated.
Hmm, okay, but what if I take a full backup from a primary server and later I want an incremental from a standby, or the other way around? Will this prevent me from using such a combination?
Yes, that worked for me where the system identifier was the same on master as well standby.