On 6/10/12 11:47 AM, Joshua Berkus wrote:
> So currently we have a major limitation in binary replication, where it is 
> not possible to "remaster" your system (that is, designate the most caught-up 
> standby as the new master) based on streaming replication only.  This is a 
> major limitation because the requirement to copy physical logs over scp (or 
> similar methods), manage and expire them more than doubles the administrative 
> overhead of managing replication.  This becomes even more of a problem if 
> you're doing cascading replication.
> Therefore I think this is a high priority for 9.3.
> As far as I can tell, the change required for remastering over streaming is 
> relatively small; we just need to add a new record type to the streaming 
> protocol, and then start writing the timeline change to that.  Are there 
> other steps required which I'm not seeing?

*sound of crickets chirping*

Is there other work involved which isn't immediately apparent?

Josh Berkus
PostgreSQL Experts Inc.

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