On Thu, Nov 9, 2017 at 10:32 AM, Shreeyansh Dba <shreeyansh2014(at)gmail(dot)com>
wrote:
>
>
> On Wed, Nov 8, 2017 at 9:47 PM, 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.
>>>
>>
>>
> In addition to above, Slony also an option for keeping master & slave on
> different versions which play a key role during upgrades for reducing
> downtime drastically.
>
>
> --
> <https://shreeyansh.com/>
>