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| author | Heikki Linnakangas <heikki.linnakangas@iki.fi> | 2013-01-17 20:23:00 +0200 |
|---|---|---|
| committer | Heikki Linnakangas <heikki.linnakangas@iki.fi> | 2013-01-17 20:23:00 +0200 |
| commit | 0b6329130e8e4576e97ff763f0e773347e1a88af (patch) | |
| tree | 7902ba1fa99ac8124232122ce16231cff0b0e21e /src/include/access/xlog.h | |
| parent | 8ae35e91807508872cabd3b0e8db35fc78e194ac (diff) | |
| download | postgresql-0b6329130e8e4576e97ff763f0e773347e1a88af.tar.gz postgresql-0b6329130e8e4576e97ff763f0e773347e1a88af.zip | |
Make pg_receivexlog and pg_basebackup -X stream work across timeline switches.
This mirrors the changes done earlier to the server in standby mode. When
receivelog reaches the end of a timeline, as reported by the server, it
fetches the timeline history file of the next timeline, and restarts
streaming from the new timeline by issuing a new START_STREAMING command.
When pg_receivexlog crosses a timeline, it leaves the .partial suffix on the
last segment on the old timeline. This helps you to tell apart a partial
segment left in the directory because of a timeline switch, and a completed
segment. If you just follow a single server, it won't make a difference, but
it can be significant in more complicated scenarios where new WAL is still
generated on the old timeline.
This includes two small changes to the streaming replication protocol:
First, when you reach the end of timeline while streaming, the server now
sends the TLI of the next timeline in the server's history to the client.
pg_receivexlog uses that as the next timeline, so that it doesn't need to
parse the timeline history file like a standby server does. Second, when
BASE_BACKUP command sends the begin and end WAL positions, it now also sends
the timeline IDs corresponding the positions.
Diffstat (limited to 'src/include/access/xlog.h')
| -rw-r--r-- | src/include/access/xlog.h | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/src/include/access/xlog.h b/src/include/access/xlog.h index 885b5fc0ad7..72e32425964 100644 --- a/src/include/access/xlog.h +++ b/src/include/access/xlog.h @@ -317,8 +317,10 @@ extern void SetWalWriterSleeping(bool sleeping); /* * Starting/stopping a base backup */ -extern XLogRecPtr do_pg_start_backup(const char *backupidstr, bool fast, char **labelfile); -extern XLogRecPtr do_pg_stop_backup(char *labelfile, bool waitforarchive); +extern XLogRecPtr do_pg_start_backup(const char *backupidstr, bool fast, + TimeLineID *starttli_p, char **labelfile); +extern XLogRecPtr do_pg_stop_backup(char *labelfile, bool waitforarchive, + TimeLineID *stoptli_p); extern void do_pg_abort_backup(void); /* File path names (all relative to $PGDATA) */ |