Re: WAL history files - Pgsql 9.2

2016-12-12 12:09 GMT+13:00 Patrick B <patrickbakerbr(at)gmail(dot)com>:

> 2016-12-12 12:00 GMT+13:00 Venkata B Nagothi <nag1010(at)gmail(dot)com>:
>
>>
>> On Mon, Dec 12, 2016 at 7:48 AM, Patrick B <patrickbakerbr(at)gmail(dot)com>
>> wrote:
>>
>>> Hi guys,
>>>
>>> Are the history files copied with the wal_files? Or I have to do it
>>> separated?
>>>
>>> 00000003.history': No such file or directory
>>>
>>>
>>> I'm using PostgreSQL 9.2.
>>>
>>
>> Can you please explain the scenario you are referring to ? during
>> streaming replication ? or during standby promotion ?
>>
>>
>>
>
>
> Sure...
>
> I've got:
>
> > Master01 (sending wal_files to the slaves)
> > slave01 (streaming replication from master01 + wal_files)
> > slave02 (streaming replication from master01 + wal_files)
>
> I'll turn slave01 into a master; on recovery.conf:
>
> trigger_file = '/tmp/pg_failover_trigger';touch /tmp/pg_failover_trigger
>
>
> Then, the new scenario will be:
> > slave01 (*NEW MASTER*)
> > slave02 (streaming replication from slave01 + wal_files)
>
>
> Will slave02 be able to switch the timeline using wal_files provided by
> the new master?
> Thanks
>
>

No.. it didn't copy. i tested here. I had to manually copy the history file
from /var/lib/pgsql/9.2/data/pg_xlogs from the new master to the same
directory on the slaves.