Re: [PATCH 10/16] Introduce the concept that wal has a 'origin' node

On Wed, Jun 20, 2012 at 3:27 PM, Andres Freund <andres(at)2ndquadrant(dot)com> wrote:

>> OK, so in this case, I still don't see how the "origin_id" is even enough.
>>
>> C applies the change originally from A (routed through B, because it's
>> faster).  But when it get's the change directly from A, how does it
>> know to *not* apply it again?
> The lsn of the change.

So why isn't the LSN good enough for when C propagates the change back to A?

Why does A need more information than C?

a.

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