Fujii Masao wrote:
On Fri, May 15, 2009 at 8:56 PM, Heikki Linnakangas
<heikki.linnakan...@enterprisedb.com> wrote:
Fujii Masao wrote:
When only the history file for timeline 6 is deleted, timeline 6 would be
assigned as the newest one *again* at the end of archive recovery.
Is this safe?
If you delete history file and all the WAL for timeline 6, yeah, nothing
stops it from being reused. It will work just fine, as if it never existed.
If you still have the history file and WAL for the old timeline 6 lying
around somewhere else like an older offsite backup, it's easy for the
administrator to get confused, but there isn't much we can do about that.
OK, I probably understood your point. The timeline history files whose
timeline ID is larger than that of an oldest backup must not be deleted
from the archive. On the other hand, the smaller or equal one can be
deleted. Not all history files are necessary. So, if we don't keep older
backup, we probably can delete all files in the archive before
pg_start_backup().
Is my understanding right?
Yes, that's correct.
--
Heikki Linnakangas
EnterpriseDB http://www.enterprisedb.com
--
Sent via pgsql-bugs mailing list (pgsql-bugs@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-bugs
