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7117685461
Previously non-exclusive backups had to be done using the replication protocol and pg_basebackup. With this commit it's now possible to make them using pg_start_backup/pg_stop_backup as well, as long as the backup program can maintain a persistent connection to the database. Doing this, backup_label and tablespace_map are returned as results from pg_stop_backup() instead of being written to the data directory. This makes the server safe from a crash during an ongoing backup, which can be a problem with exclusive backups. The old syntax of the functions remain and work exactly as before, but since the new syntax is safer this should eventually be deprecated and removed. Only reference documentation is included. The main section on backup still needs to be rewritten to cover this, but since that is already scheduled for a separate large rewrite, it's not included in this patch. Reviewed by David Steele and Amit Kapila |
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