Re: Freeze avoidance of very large table.

Masahiko Sawada wrote:

> I misunderstood. Sorry for noise.
> I agree with adding conversion method as a pageConverter routine.

\o/

> This patch doesn't change page layout actually, but pageConverter
> routine checks only the page layout.
> And we have to plugin named convertLayout_X_to_Y.
> 
> I think we have two options.
> 
> 1. Change page layout(PG_PAGE_LAYOUT_VERSION) to 5. pg_upgrade detects
> it and then converts only VM files.
> 2. Change pg_upgrade plugin mechanism so that it can handle other name
> conversion plugins (e.g., convertLayout_vm_to_vfm)
> 
> I think #2 is better. Thought?

My vote is for #2 as well.  Maybe we just didn't have forks when this
functionality was invented; maybe the author just didn't think hard
enough about what would be the right interface to do it.

-- 
Álvaro Herrera                http://www.2ndQuadrant.com/
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