| From: | Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> |
|---|---|
| To: | Stephen Frost <sfrost(at)snowman(dot)net> |
| Cc: | Edson Carlos Ericksson Richter <richter(at)simkorp(dot)com(dot)br>, pgsql-general(at)lists(dot)postgresql(dot)org |
| Subject: | Re: Does PostgreSQL check database integrity at startup? |
| Date: | 2017-12-27 16:47:46 |
| Message-ID: | 20171227164746.hnoqqxefp5abzjwz@alvherre.pgsql |
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| Lists: | pgsql-general |
Stephen Frost wrote:
> * Edson Carlos Ericksson Richter (richter(at)simkorp(dot)com(dot)br) wrote:
> > Anyway, instead digging into rsync functionality (or bugs - I doubt,
> > but who knows?), I do prefer to have a script I can run to check if
> > there is obvious failures in standby servers.
>
> As mentioned, zero-byte files can be perfectly valid. PostgreSQL does
> have page-level CRCs, if you initialized your database with them (which
> I would strongly recommend).
Page-level checksums would not detect the problem being complained in
this thread, however.
--
Álvaro Herrera https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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