On 23.12.2012 15:33, Fujii Masao wrote:
On Fri, Dec 21, 2012 at 9:54 PM, Heikki Linnakangas
<hlinnakan...@vmware.com> wrote:
Yes, this should be backpatched to 9.2. I came up with the attached.
In this patch, if '-X stream' is specified in pg_basebackup, the timeline
history files are not backed up.
Good point.
We should change pg_backup background
process and walsender so that they stream also timeline history files,
for example, by using 'TIMELINE_HISTORY' replication command?
Or basebackup.c should send all timeline history files at the end of backup
even if '-X stream' is specified?
Perhaps. We should enhance pg_receivexlog to follow timeline switches,
anyway. I was thinking of leaving that as a todo item, but pg_basebackup
-X stream shares the code, so we should implement that now to get that
support into both.
In the problem you reported on the other thread
(http://archives.postgresql.org/message-id/50db5ea9.7010...@vmware.com),
you also need the timeline history files, but that one didn't use "-X"
at all. Even if we teach pg_basebackup to fetch the timeline history
files in "-X stream" mode, that still leaves the problem on that other
thread.
The simplest solution would be to always include all timeline history
files in the backup, even if -X is not used. Currently, however, pg_xlog
is backed up as an empty directory in that case, but that would no
longer be the case if we start including timeline history files there. I
wonder if that would confuse any existing backup scripts people are using.
- Heikki
--
Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-hackers
