On 2/19/15 4:11 AM, Andres Freund wrote:
Thoughts? Can't say that I've given conflict resolution for
>multi-master systems a great deal of thought before now, so I might be
>quite off the mark here.
I don't think conflict resolution actually plays a role here. This is
about consistency inside a single system, not consistency across
systems.
Isn't it possible that a multi-master resolution algo would want to know
that something was an UPSERT though? ISTM handling that differently than
a plain INSERT/UPDATE is something you might well want to do.
For example, if you're using last-wins conflict resolution and UPSERTs
on two nodes overlap, wouldn't you want to know that the second UPSERT
was an UPSERT and not a plain INSERT?
--
Jim Nasby, Data Architect, Blue Treble Consulting
Data in Trouble? Get it in Treble! http://BlueTreble.com
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