On 04/14/2015 05:32 PM, Tom Lane wrote:
Heikki Linnakangas <hlinn...@iki.fi> writes:
On 04/14/2015 02:24 AM, Tom Lane wrote:
Wait a minute. Didn't you just break PITR scenarios? The *entire point*
of the multiple-timeline mechanism is that you can start a new WAL history
from a point in the past without destroying WAL history after that point
on the old timeline.
It deletes the files belonging to other timelines from pg_xlog only. The
WAL archive is not touched.
How do we know those files are in the WAL archive?
Presumably that's where they came from if you're doing PITR. Or they
were copied into pg_xlog manually from somewhere else.
After PITR, if you decide that you didn't like the result and perform
another recovery, you have to restore from a base backup again, which
will wipe out pg_xlog anyway.
Also, if the recovery continued longer, those files would be deleted
from pg_xlog anyway, at a later restartpoint.
- Heikki
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