On Fri, Apr 4, 2014 at 6:27 PM, Joe Van Dyk <[email protected]> wrote:
>
> $ ls -ldc /mnt/postgresql/9.3/*
> [...]
> drwx------ 2 postgres postgres 4096 Apr  4 18:25 
> /mnt/postgresql/9.3/pg_subtrans
> [...]


Heh. The last change time is recent, but so it is for several other
directories with thrashing contents, which is expected.  Unfortunately
this diagnostic is not as useful as I had hoped because I forgot that
change time is useless on directories with changing entries.

To make matters worse, I've never seen this bug in spite of all the
backups/restores I've done (automatically) which have fingered several
other obscure bugs.

All in all, I'd like to pin down two things:

1) If one pokes at the tar files in S3 using a program like "tar", is
   there no pg_subtrans directory entry in any of them?

   This would isolate the problem to the back-up routine rather than
   the restore routines.

2) Presuming the first fact yields "yes, it's a problem in taking the
   backup", If you take another base backup, does it routinely produce
   such problems (i.e. this is workload-dependent, or even
   deterministic)?

Alternatively, if it's a problem in restore, well, life is much easier
because the specific manifest in each tar and can be put under a
microscope and the extraction routines can be fixed for everyone in a
point release.

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