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Allow archiving via loadable modules.

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Running a shell command for each file to be archived has a lot of
overhead and may not offer as much error checking as you want, or the
exact semantics that you want. So, offer the option to call a loadable
module for each file to be archived, rather than running a shell command.

Also, add a 'basic_archive' contrib module as an example implementation
that archives to a local directory.

Nathan Bossart, with a little bit of kibitzing by me.

Discussion: http://postgr.es/m/20220202224433.GA1036711@nathanxps13
This commit is contained in:
Robert Haas
2022-02-03 13:57:27 -05:00
parent 7c1aead6cb
commit 5ef1eefd76
26 changed files with 941 additions and 67 deletions
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2
src/backend/access/transam/xlog.c
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@ -8831,7 +8831,7 @@ ShutdownXLOG(int code, Datum arg)
* process one more time at the end of shutdown). The checkpoint
* record will go to the next XLOG file and won't be archived (yet).
*/
if (XLogArchivingActive() && XLogArchiveCommandSet())
if (XLogArchivingActive())
RequestXLogSwitch(false);
CreateCheckPoint(CHECKPOINT_IS_SHUTDOWN | CHECKPOINT_IMMEDIATE);