On Wed, Jun 18, 2014 at 1:40 AM, Robert Haas <robertmh...@gmail.com> wrote: > On Mon, Jun 2, 2014 at 8:55 AM, Michael Paquier > <michael.paqu...@gmail.com> wrote: > I'm not sure if this is reasonably possible, but one thing that would > make this tool a whole lot easier to use would be if you could make > all the magic happen in a single server. For example, suppose you had > a background process that somehow got access to the pre and post > images for every buffer change, and the associated WAL record, and > tried applying the WAL record to the pre-image to see whether it got > the corresponding post-image. Then you could run 'make check' or so > and afterwards do something like psql -c 'SELECT * FROM > wal_replay_problems()' and hopefully get no rows back. So your point is to have a 3rd independent server in the process that would compare images taken from a master and its standby? Seems to complicate the machinery.
> Don't get me wrong, having this tool at all sounds great. But I think > to really get the full benefit out of it we need to be able to run it > in the buildfarm, so that if people break stuff it gets noticed > quickly. The patch I sent has included a regression test suite making the tests rather facilitated: that's only a matter of running actually "make check" in the contrib repository containing the binary able to compare buffer captures between a master and a standby. Thanks, -- Michael -- Sent via pgsql-hackers mailing list (email@example.com) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers