Re: Replication identifiers, take 4

On 2/15/15 7:24 PM, Andres Freund wrote:
> On 2015-02-16 01:21:55 +0100, Andres Freund wrote:
>> Here's my next attept attempt at producing something we can agree
>> upon.
>>
>> The major change that might achieve that is that I've now provided a
>> separate method to store the origin_id of a node. I've made it
>> conditional on !REPLICATION_IDENTIFIER_REUSE_PADDING, to show both
>> paths. That new method uses Heikki's xlog rework to dynamically add the
>> origin to the record if a origin is set up. That works surprisingly
>> simply.

I'm trying to figure out what this feature is supposed to do, but the
patch contains no documentation or a commit message.  Where is one
supposed to start?