Re: How to transfer databases form one server to other

[Ron <ronljohnsonjr@xxxxxxxxx>]

    On 1/26/20 7:30 PM, Adrian Klaver wrote:
> On
>       1/26/20 2:47 PM, Andrus wrote:
>       
> > Hi!
> >         
> >         
> > > Before you do any of this I would check
> > >           the Release Notes for the first release of each major release.
> > >           Prior to version 10 that would be X.X.x where X is a major
> > >           release. For 10+ that is X.x.  I would also test the upgrade
> > >           before doing it on your production setup.
> > >           
> > >         
> >         
> >         I want to create test transfer first, check applications work
> >         and after that final transfer.
> >         
> >         
> > > Best practice if you are going the
> > >           dump/restore route is to use the pg_dump binary from the new
> > >           server(12) to dump the old server(9.1)
> > >           
> > >         
> >         
> >         Postgres version 12 pg_dump probably cannot installed in old
> >         server (Debian Squeeze 9).
> >         
> >         Running pg_dump in new server probably takes much more time
> >         since data is read from uncompressed form and dumping is
> >         time-consuming process.
> >         
> >         (internet connection between those server is fast, SSH copy
> >         speed was 800 Mbit (not 100 Mbit as I wrote), it took 5 minutes
> >         to copy 37 GB).
> >         
> >       
>       
>       Test it and see how slow/fast it is.
>       
>     
    
    I ran uncompressed pg_dump on multiple TB+ sized databases
    from v8.4 servers across the LAN using 9.6 binaries on the remote
    server.  It was quite fast.  Threading was key.

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