Hi All,
With the attached patch, the backup manifest will have a new key item as
"System-Identifier" 64-bit integer whose value is derived from pg_control while
generating it, and the manifest version bumps to 2.
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.
For backward compatibility, the manifest system identifier validation will be
skipped for version 1.
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