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Re: HOT standby with ONLY WAL shipping? - Mailing list pgsql-general

From Keith Fiske
Subject Re: HOT standby with ONLY WAL shipping?
Date
Msg-id CAG1_KcCtp9-bA6B6Y0ArASOGXOXKyWOweFBoCiXuB5B-=-Ju4A@mail.gmail.com
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In response to HOT standby with ONLY WAL shipping?  (CS_DBA <cs_dba@consistentstate.com>)
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On Thu, Jun 12, 2014 at 1:01 PM, CS_DBA <cs_dba@consistentstate.com> wrote:
Hi All;

We would like to setup a hot standby server with a forced delay.
Is it possible to setup a hot standby based ONLY on WAL shipping and NOT use streaming replication?

Thanks in advance


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The omnipitr tool can provide the delayed slave feature you're looking for.
https://github.com/omniti-labs/omnipitr/

Look into the --recovery-delay (-w) feature of the omnipitr-restore command which is used in the recovery.conf of the slave
https://github.com/omniti-labs/omnipitr/blob/master/doc/omnipitr-restore.pod

Whether a slave is a hot standby is not determined by whether you're using streaming replication or WAL replay. It is determined by setting the parameter "hot_standby" on the slave and ensuring the master has a minimum "wal_level" of "hot_standby" as well. So both streaming and wal replay slaves can be hot standbys.

--
Keith Fiske
Database Administrator
OmniTI Computer Consulting, Inc.
http://www.keithf4.com

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