On Sat, Mar 04, 2023 at 09:47:05AM +0530, Bharath Rupireddy wrote: > Okay, here's a patch attached.
Thanks. + * When source == XLOG_FROM_ANY, this function first searches for the segment + * with a TLI in archive first, if not found, it searches in pg_wal. This way, + * if there is a WAL segment with same passed-in segno but different TLI + * present in both the archive and pg_wal, it prefers the one with higher TLI. + * The reason for this is that if for example we try to do archive recovery to + * timeline 2, which branched off timeline 1, but the WAL for timeline 2 is not + * archived yet, we would replay past the timeline switch point on timeline 1 + * using the archived WAL segment, before even looking timeline 2's WAL + * segments in pg_wal. This is pretty much what the commit has mentioned. The first half provides enough details, IMO. -- Michael
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