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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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3
src/backend/utils/misc/postgresql.conf.sample
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@@ -245,6 +245,9 @@
#archive_mode = off # enables archiving; off, on, or always
# (change requires restart)
#archive_library = '' # library to use to archive a logfile segment
# (empty string indicates archive_command should
# be used)
#archive_command = '' # command to use to archive a logfile segment
# placeholders: %p = path of file to archive
# %f = file name only