Re: [PATCH] Recreate Missing WAL Directories (from TODO)

"Jonah H. Harris" <jonah(dot)harris(at)gmail(dot)com> writes:
> When performing a PITR copy of a data cluster, the pg_xlog directory
> is generally omitted. As such, when starting the copy up for
> replay/recovery, the WAL directories need to be recreated. This patch
> checks to see whether XLOGDIR and XLOGDIR/archive_status exist on
> XLOGStartup and if not, recreates them.

This has been suggested before but I'm unconvinced that it's a good
idea. It's reasonably common for pg_xlog to be a symlink. If you
neglect to re-establish the symlink then what would happen is that xlog
gets recreated on the data disk, and with no notice you are running in
a degraded mode.

It might be reasonable to auto-recreate XLOGDIR/archive_status, though.

regards, tom lane