Re: Cascade streaming replication + wal_files - Pgsql 9.2

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> On Thu, 7 Jul 2016, 9:20 a.m. Patrick B, <patrickbakerbr(at)gmail(dot)com> wrote:
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>> Hi guys,
>>
>> I got two slaves using Postgresql 9.2.
>>
>> slave01 - Streaming replication from master
>> slave02 - nothing.. new server
>>
>> is it possible to get slave02 replicating from slave01 (Cascade streaming
>> replication) this can be done with streaming ?
>>
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> Yes, a cascaded standby can be setup with Streaming Replication in v9.2
> and above.
>
> and also slave01 sending the wal_files to that new slave02?
>>
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> What exactly do you mean here by "sending the wal_files"??
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>
>> So it would be on slave01
>>
>> archive_mode = ok
>> archive_command = ....
>>
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> This will have no effect on a standby server. archive_command will be
> neglected
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> This is possible only in v9.5 onward when archive_mode is set to always.
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> wal_level = hot_standby
>> max_wal_senders = 2
>> wal_keep_segments = 128
>>
>> Is that right?
>>
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> If you want to set up archiving from slave01, checkout pg_receivexlog.
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> https://www.postgresql.org/docs/9.2/static/app-pgreceivexlog.html
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> It might be helpful as it does something similar to archiving but using
> streaming protocol (so I think it should work even in cascaded mode). But
> since it works using streaming protocol, max_wal_senders on slave01 will be
> 2(what you have set now) + 1 (for pg_reveivexlog)
>
>

ok.. got a little confused now.

the only way to archive the wal_files from a slave into another slave on
PostgreSQL 9.2, is by using pg_reveivexlog?