On Tue, Mar 26, 2019 at 05:23:01PM -0700, Peter Geoghegan wrote:
> I have personally seen real world corruption that involved a page
> image consisting of random noise. Several times. Failing to detect
> blatant corruption is unacceptable IMV.
Yeah, I have seen that as well. If we have a tool not
Greetings,
* Andres Freund (and...@anarazel.de) wrote:
> On 2019-03-26 21:01:27 -0400, Stephen Frost wrote:
> > I'm also not convinced that these changes to pg_basebackup will be free
> > of issues that may impact users in a negative way, making me concerned
> > that we're going to end up doing mo
Hi,
On 2019-03-26 21:01:27 -0400, Stephen Frost wrote:
> I'm also not convinced that these changes to pg_basebackup will be free
> of issues that may impact users in a negative way, making me concerned
> that we're going to end up doing more harm than good with such a change
> being back-patched.
Greetings,
* Andres Freund (and...@anarazel.de) wrote:
> On 2019-03-26 20:18:31 -0400, Stephen Frost wrote:
> > > >>I thought Robert's response was generally good, pointing out that
> > > >>we're talking about this being an issue if the corruption happens in a
> > > >>certain set of bytes. That s
Greetings,
* Tomas Vondra (tomas.von...@2ndquadrant.com) wrote:
> On Tue, Mar 26, 2019 at 08:18:31PM -0400, Stephen Frost wrote:
> >* Tomas Vondra (tomas.von...@2ndquadrant.com) wrote:
> >>On Tue, Mar 26, 2019 at 04:49:21PM -0700, Andres Freund wrote:
> >>>On 2019-03-26 19:22:03 -0400, Stephen Fro
On Tue, Mar 26, 2019 at 08:18:31PM -0400, Stephen Frost wrote:
Greetings,
* Tomas Vondra (tomas.von...@2ndquadrant.com) wrote:
On Tue, Mar 26, 2019 at 04:49:21PM -0700, Andres Freund wrote:
>On 2019-03-26 19:22:03 -0400, Stephen Frost wrote:
>>* Andres Freund (and...@anarazel.de) wrote:
>>> As
Hi,
On 2019-03-26 20:18:31 -0400, Stephen Frost wrote:
> > >>I thought Robert's response was generally good, pointing out that
> > >>we're talking about this being an issue if the corruption happens in a
> > >>certain set of bytes. That said, I'm happy to see improvements in
> > >>this area but I
On Tue, Mar 26, 2019 at 5:10 PM Tomas Vondra
wrote:
> Bogus might be a bit too harsh, but yeah - failure to reliably detect
> obviously
> invalid checksums when the LSN just happens to be high due to randomness is
> not
> a good thing. We'll still detect pages corrupted in other places, but this
Greetings,
* Tomas Vondra (tomas.von...@2ndquadrant.com) wrote:
> On Tue, Mar 26, 2019 at 04:49:21PM -0700, Andres Freund wrote:
> >On 2019-03-26 19:22:03 -0400, Stephen Frost wrote:
> >>* Andres Freund (and...@anarazel.de) wrote:
> >>> As detailed in
> >>> https://postgr.es/m/20190319200050.ncuxe
On Tue, Mar 26, 2019 at 04:49:21PM -0700, Andres Freund wrote:
Hi,
On 2019-03-26 19:22:03 -0400, Stephen Frost wrote:
Greetings,
* Andres Freund (and...@anarazel.de) wrote:
> As detailed in
> https://postgr.es/m/20190319200050.ncuxejradurjakdc%40alap3.anarazel.de
> the way the backend's baseba
Hi,
On 2019-03-26 19:22:03 -0400, Stephen Frost wrote:
> Greetings,
>
> * Andres Freund (and...@anarazel.de) wrote:
> > As detailed in
> > https://postgr.es/m/20190319200050.ncuxejradurjakdc%40alap3.anarazel.de
> > the way the backend's basebackup checksum verification works makes its
> > error d
Greetings,
* Andres Freund (and...@anarazel.de) wrote:
> As detailed in
> https://postgr.es/m/20190319200050.ncuxejradurjakdc%40alap3.anarazel.de
> the way the backend's basebackup checksum verification works makes its
> error detection capabilities very dubious.
I disagree that it's 'very dubiou
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