| From: | Andres Freund <andres(at)anarazel(dot)de> |
|---|---|
| To: | Daniel Gustafsson <daniel(at)yesql(dot)se> |
| Cc: | Robert Haas <robertmhaas(at)gmail(dot)com>, Magnus Hagander <magnus(at)hagander(dot)net>, Andrey Borodin <x4mmm(at)yandex-team(dot)ru>, Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com>, Heikki Linnakangas <hlinnaka(at)iki(dot)fi>, Michael Banck <michael(dot)banck(at)credativ(dot)de>, Greg Stark <stark(at)mit(dot)edu>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Online enabling of checksums |
| Date: | 2018-07-31 21:23:44 |
| Message-ID: | 20180731212344.yec5pfmmurs2vwbq@alap3.anarazel.de |
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| Lists: | pgsql-hackers |
Hi,
On 2018-07-31 23:20:27 +0200, Daniel Gustafsson wrote:
> > On 26 Jul 2018, at 19:35, Andres Freund <andres(at)anarazel(dot)de> wrote:
> > On July 26, 2018 10:03:39 AM PDT, Robert Haas <robertmhaas(at)gmail(dot)com <mailto:robertmhaas(at)gmail(dot)com>> wrote:
>
> >> Why can't we do better?
> >
> > I don't think it's that hard to do better. IIRC I even outlined something before the freeze. If not, o certainly can (sketch: use procsignal based acknowledgment protocol, using a 64 bit integer. Useful for plenty other things).
>
> Not really arguing for or against, but just to understand the reasoning before
> starting hacking. Why do we feel that a restart (intended for safety here) in
> this case is a burden on a use-once process? Is it from a usability or
> technical point of view? Just want to make sure we are on the same page before
> digging in to not hack on this patch in a direction which isn’t what is
> requested.
Having, at some arbitrary seeming point in the middle of enabling
checksums to restart the server makes it harder to use and to schedule.
The restart is only needed to fix a relatively small issue, and doesn't
save that much code.
Greetings,
Andres Freund
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