Re: pg_upgrade and rsync

On 2/19/15 11:57 AM, Bruce Momjian wrote:
> On Wed, Jan 28, 2015 at 09:26:11PM -0800, Josh Berkus wrote:
>>
>> 3. Check that the replica is not very lagged.  If it is, wait for
>> traffic to die down and for it to catch up.
>
> Now that 9.4.1 is released, I would like to get this doc patch applied
> --- it will close the often-requested feature of how to pg_upgrade slave
> clusters.
>
> I wasn't happy with Josh's specification above that the "replica is not
> very lagged", so I added a bullet point to check the pg_controldata
> output to verify that the primary and standby servers are synchronized.
>
> Yes, this adds even more complication to the pg_upgrade instructions,
> but it is really more of the same complexity.  pg_upgrade really needs
> an install-aware and OS-aware tool on top of it to automate much of
> this.

#3 bothered me as well because it was not specific enough.  I like what
you've added to clarify the procedure.

--
- David Steele
david@pgmasters.net