Re: Offline enabling/disabling of data checksums

Hi,

Am Mittwoch, den 13.03.2019, 11:47 +0100 schrieb Magnus Hagander:
> On Wed, Mar 13, 2019 at 11:41 AM Michael Banck <michael(dot)banck(at)credativ(dot)de> wrote:
> > I propose we re-read the control file for the enable case after we
> > finished operating on all files and (i) check the instance is still
> > offline and (ii) update the checksums version from there. That should be
> > a small but worthwhile change that could be done anyway.
>
> In (i) you need to also check that is' not offline *again*. Somebody
> could start *and* stop the database while pg_checksums is running. But
> that should hopefully be enough to check the time field?

Good point.

> > Also, I suggest to maybe add a notice in verbose mode that we are
> > syncing the data directory - otherwise the user might wonder what's
> > going on at 100% done, though I haven't seen a large delay in my tests
> > so far.
>
> Seems like a good idea -- there certainly could be a substantial delay
> there depending on data size and underlying storage.

The attached patch should do the above, on top of Michael's last
patchset.

Michael

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