Re: Pg-Upgrade standbys via rsync... and avoid sending UNlogged data?

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От Bruce Momjian
Тема Re: Pg-Upgrade standbys via rsync... and avoid sending UNlogged data?
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Msg-id 20160804225536.GA22579@momjian.us
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Ответ на Re: Pg-Upgrade standbys via rsync... and avoid sending UNlogged data?  (Stephen Frost <sfrost@snowman.net>)
Ответы Re: Pg-Upgrade standbys via rsync... and avoid sending UNlogged data?  (Peter Eisentraut <peter.eisentraut@2ndquadrant.com>)
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On Tue, Jul 26, 2016 at 07:11:29PM -0400, Stephen Frost wrote:
> * Bruce Momjian (bruce@momjian.us) wrote:
> > On Mon, Jul 25, 2016 at 12:34:45PM -0500, Jerry Sievers wrote:
> > > Stephen Frost <sfrost@snowman.net> writes:
> > >
> > > > * Stephen Frost (sfrost@snowman.net) wrote:
> > > >
> > > >> > I have among others, a 5TB system  w/about 40G of unlogged data.
> > > >>
> > > >> Honestly, sending an extra 40G out of 5TB (we're talking less than 1%
> > > >> here...) might be worth it to keep the process simple.
> > > >
> > > > Of course, I realize right after sending this that you aren't sending
> > > > the 5TB. :)
> > >
> > > Roger that!  Really, the hard link pg-upgrade option and rsync method
> > > for standbys is pure beauty :-)
> > >
> > > We have only the post-analyze and this unlogged data  problem to deal
> > > with.
> > >
> > > The warehouse is our only system with any substantial amount of unlogged
> > > data.
> > >
> > > Reducing post-analyze delay was solved by me here with our groovy
> > > threaded AnalyzMaTron.  I can get a >5TB system done in about 45 minutes
> > > w/20 threads.
> >
> > The only thing I can suggest is to document this limitation, if people
> > think it is worth it.
>
> It'd probably be good to document what happens with unlogged tables.

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--
  Bruce Momjian  <bruce@momjian.us>        http://momjian.us
  EnterpriseDB                             http://enterprisedb.com

+ As you are, so once was I. As I am, so you will be. +
+                     Ancient Roman grave inscription +

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