Re: standby registration (was: is sync rep stalled?)

From: Josh Berkus <josh(at)agliodbs(dot)com>
To: Robert Haas <robertmhaas(at)gmail(dot)com>
Cc: Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com>, Greg Smith <greg(at)2ndquadrant(dot)com>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: standby registration (was: is sync rep stalled?)
Date: 2010-10-07 18:33:03
Message-ID: 4CAE125F.2030204@agliodbs.com
Views: Raw Message | Whole Thread | Download mbox | Resend email
Thread:
Lists: pgsql-hackers


> I think they work together fine. Greg's idea is that you list the
> important standbys, and a synchronization guarantee that you'd like to
> have for at least one of them. Simon's idea - at least at 10,000 feet
> - is that you can take a pass on that guarantee for transactions that
> don't need it. I don't see why you can't have both.

So, two things:

1) This version of Standby Registration seems to add One More Damn Place
You Need To Configure Standby (OMDPYNTCS) without adding any
functionality you couldn't get *without* having a list on the master.
Can someone explain to me what functionality is added by this approach
vs. not having a list on the master at all?

2) I see Simon's approach where you can designate not just synch/asynch,
but synch *mode* per session to be valuable. I can imagine having
transactions I just want to "ack" vs. transactions I want to "apply"
according to application logic (e.g. customer personal information vs.
financial transactions). This approach would still seem to remove that
functionality. Does it?

--
-- Josh Berkus
PostgreSQL Experts Inc.
http://www.pgexperts.com

In response to

Responses

Browse pgsql-hackers by date

  From Date Subject
Next Message Markus Wanner 2010-10-07 18:38:17 Re: Issues with Quorum Commit
Previous Message Kevin Grittner 2010-10-07 18:31:53 Re: Issues with Quorum Commit