Re: optimize file transfer in pg_upgrade

From: Andres Freund <andres(at)anarazel(dot)de>
To: Nathan Bossart <nathandbossart(at)gmail(dot)com>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Robert Haas <robertmhaas(at)gmail(dot)com>, Greg Sabino Mullane <htamfids(at)gmail(dot)com>, pgsql-hackers(at)postgresql(dot)org, bruce(at)momjian(dot)us
Subject: Re: optimize file transfer in pg_upgrade
Date: 2025-03-18 17:50:10
Message-ID: 7rhxl5nl5cuenm4kzprjhaojo74m2teuwzjffcrdi6bxx6b2wn@orb5h3mteh2y
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On 2025-03-18 12:47:01 -0500, Nathan Bossart wrote:
> On Tue, Mar 18, 2025 at 01:37:02PM -0400, Andres Freund wrote:
> > - Do we need a new old cluster for each of the modes? That seems like wasted
> > time? I guess it's required for --link...
>
> It'll also be needed for --swap. We could optionally save the old cluster
> for a couple of modes if we really wanted to. *shrug*

Don't worry about it, I think the template initdb stuff should make it cheap enough...

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