Re: how to identify the timeline of specified recovery_target_timewhen do multiple PITR

magodo wrote:
> > By default, recovery will stay on the timeline where it started.
> > If you want to go to timeline 2 or 3, you have to specify
> > recovery_target_timeline.
> > 
> For me, the specified point corresponds to timeline 1, because at that
> time, the timeline is 1 indeed (when there is no timeline 2 branched
> out yet). 
> 
> So in other word, my expectation is like I want to get the first
> timeline which covers the specified time.
> 
> As you mentioned, there is no active timeline concept in postgres, then
> what is the best practice to meet my expectation? Do I have to somehow
> record the timestamp when archived wal's timeline has been changed,
> then compare the specified recovery target time with those records to
> find the first timeline which covers that time?

As I wrote, that is the default behavior; PostgreSQL will stay on
the timeline that was active when recovery was started.

Yours,
Laurenz Albe
-- 
Cybertec | https://www.cybertec-postgresql.com