From: | Magnus Hagander <magnus(at)hagander(dot)net> |
---|---|
To: | Kyotaro Horiguchi <horikyota(dot)ntt(at)gmail(dot)com> |
Cc: | Fujii Masao <masao(dot)fujii(at)oss(dot)nttdata(dot)com>, Peter Eisentraut <peter(dot)eisentraut(at)2ndquadrant(dot)com>, "Shinoda, Noriyoshi (PN Japan A&PS Delivery)" <noriyoshi(dot)shinoda(at)hpe(dot)com>, Amit Langote <amitlangote09(at)gmail(dot)com>, masahiko(dot)sawada(at)2ndquadrant(dot)com, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: pg_stat_progress_basebackup - progress reporting for pg_basebackup, in the server side |
Date: | 2020-03-09 05:21:22 |
Message-ID: | CABUevEziUsUktnTdE-0=WAom80JBk8Bs0of1KoLZw7F_u9dmZg@mail.gmail.com |
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Lists: | pgsql-hackers |
On Sun, Mar 8, 2020 at 10:13 PM Kyotaro Horiguchi
<horikyota(dot)ntt(at)gmail(dot)com> wrote:
>
> At Fri, 6 Mar 2020 09:54:09 -0800, Magnus Hagander <magnus(at)hagander(dot)net> wrote in
> > On Fri, Mar 6, 2020 at 1:51 AM Fujii Masao <masao(dot)fujii(at)oss(dot)nttdata(dot)com> wrote:
> > > I believe that the time required to estimate the backup size is not so large
> > > in most cases, so in the above idea, most users don't need to specify more
> > > option for the estimation. This is good for UI perspective.
> > >
> > > OTOH, users who are worried about the estimation time can use
> > > --no-estimate-backup-size option and skip the time-consuming estimation.
> >
> > Personally, I think this is the best idea. it brings a "reasonable
> > default", since most people are not going to have this problem, and
> > yet a good way to get out from the issue for those that potentially
> > have it. Especially since we are now already showing the state that
> > "walsender is estimating the size", it should be easy enugh for people
> > to determine if they need to use this flag or not.
> >
> > In nitpicking mode, I'd just call the flag --no-estimate-size -- it's
> > pretty clear things are about backups when you call pg_basebackup, and
> > it keeps the option a bit more reasonable in length.
>
> I agree to the negative option and the shortened name. What if both
> --no-estimate-size and -P are specifed? Rejecting as conflicting
> options or -P supercedes? I would choose the former because we don't
> know which of them has priority.
I would definitely prefer rejecting an invalid combination of options.
--
Magnus Hagander
Me: https://www.hagander.net/
Work: https://www.redpill-linpro.com/
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