From 5ef1eefd76f404ddc59b885d50340e602b70f05f Mon Sep 17 00:00:00 2001 From: Robert Haas Date: Thu, 3 Feb 2022 13:57:27 -0500 Subject: Allow archiving via loadable modules. 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 --- src/backend/postmaster/shell_archive.c | 24 +++++++++++++++++++++++- 1 file changed, 23 insertions(+), 1 deletion(-) (limited to 'src/backend/postmaster/shell_archive.c') diff --git a/src/backend/postmaster/shell_archive.c b/src/backend/postmaster/shell_archive.c index b54e701da4d..19e240c2053 100644 --- a/src/backend/postmaster/shell_archive.c +++ b/src/backend/postmaster/shell_archive.c @@ -2,6 +2,10 @@ * * shell_archive.c * + * This archiving function uses a user-specified shell command (the + * archive_command GUC) to copy write-ahead log files. It is used as the + * default, but other modules may define their own custom archiving logic. + * * Copyright (c) 2022, PostgreSQL Global Development Group * * IDENTIFICATION @@ -17,7 +21,25 @@ #include "pgstat.h" #include "postmaster/pgarch.h" -bool +static bool shell_archive_configured(void); +static bool shell_archive_file(const char *file, const char *path); + +void +shell_archive_init(ArchiveModuleCallbacks *cb) +{ + AssertVariableIsOfType(&shell_archive_init, ArchiveModuleInit); + + cb->check_configured_cb = shell_archive_configured; + cb->archive_file_cb = shell_archive_file; +} + +static bool +shell_archive_configured(void) +{ + return XLogArchiveCommand[0] != '\0'; +} + +static bool shell_archive_file(const char *file, const char *path) { char xlogarchcmd[MAXPGPATH]; -- cgit v1.2.3