Re: Can master and slave on different PG versions?

Any one tried this before?

On Wed, Nov 8, 2017 at 8:17 AM, rammohan ganapavarapu <
rammohanganap(at)gmail(dot)com> wrote:

> David,
>
> So initially i have physical replication configured, so to upgrade slave
> to 9.6 version i did converted master slave to logical replication and then
> try to upgrade the slave to 9.6. I am getting this error when i try to
> start the slave. Any idea?
>
>
> 2017-11-08 05:08:49 UTC [20063]: [1-1] user= db= host= LOG: shutting down
> 2017-11-08 05:08:49 UTC [20063]: [2-1] user= db= host= LOG: database
> system is shut down
> 2017-11-08 05:09:45 UTC [20322]: [1-1] user= db= host= LOG: database
> system was shut down at 2017-11-08 05:08:55 UTC
> 2017-11-08 05:09:45 UTC [20322]: [2-1] user= db= host= LOG: entering
> standby mode
> 2017-11-08 05:09:45 UTC [20322]: [3-1] user= db= host= WARNING: WAL was
> generated with wal_level=minimal, data may be missing
> 2017-11-08 05:09:45 UTC [20322]: [4-1] user= db= host= HINT: This happens
> if you temporarily set wal_level=minimal without taking a new base backup.
> 2017-11-08 05:09:45 UTC [20322]: [5-1] user= db= host= FATAL: hot standby
> is not possible because wal_level was not set to "replica" or higher on the
> master server
> 2017-11-08 05:09:45 UTC [20322]: [6-1] user= db= host= HINT: Either set
> wal_level to "replica" on the master, or turn off hot_standby here.
> 2017-11-08 05:09:45 UTC [20312]: [3-1] user= db= host= LOG: startup
> process (PID 20322) exited with exit code 1
> 2017-11-08 05:09:45 UTC [20312]: [4-1] user= db= host= LOG: aborting
> startup due to startup process failure
> 2017-11-08 05:09:45 UTC [20312]: [5-1] user= db= host= LOG: database
> system is shut down
>
> Thanks,
> Ram
>
>
>
> On Mon, Oct 9, 2017 at 4:15 PM, David G. Johnston <
> david(dot)g(dot)johnston(at)gmail(dot)com> wrote:
>
>> On Mon, Oct 9, 2017 at 4:06 PM, rammohan ganapavarapu <
>> rammohanganap(at)gmail(dot)com> wrote:
>>
>>> Hi,
>>>
>>> Is it possible to add 9.6 version Slave to 9.4 master?
>>>
>>>
>> ​Physical replication, no; Logical replication, yes - if the software
>> you are using is compatible with both versions.
>>
>> David J.​
>>
>
>