Re: Hot Backup with rsync fails at pg_clog if under load - Mailing list pgsql-hackers

On Sep23, 2011, at 18:45 , Robert Haas wrote:
> Ah.  I think you are right - Heikki made the same point.  Maybe some
> of the stuff that happens just after this comment:
>
>        /*
>         * Initialize for Hot Standby, if enabled. We won't let backends in
>         * yet, not until we've reached the min recovery point specified in
>         * control file and we've established a recovery snapshot from a
>         * running-xacts WAL record.
>         */
>
>
> ...actually needs to be postponed until after we've reached consistency?

I came the the same conclusion. It seems the before we've reached consistency,
we shouldn't attempt to read anything because the data can be pretty arbitrarily
garbled.

best regards,
Florian Pflug