Fwd: Streaming Replication Without Downtime

[Gabriel Ortiz Lour <ortiz.admin@xxxxxxxxx>]

Hi!

  Thanks for pointing out pg_basebackup

  The issue I'm facing now is about missing WAL files.

  What i'm doing:

# su postgres -c 'pg_basebackup -D /var/lib/postgresql/9.1/main/ -x -h master -U sa_rep' ; service postgresql start

  The idea is to call "postgresql start" as soon as pg_basebackup ends.

  But I'm getting the following error:

  FATAL: could not receive data from WAL stream: FATAL: requested WAL segment XXXXXXX has already been removed

  Shoud I just increase 'wal_keep_segments' ?

  If I do so, do I need do restart the master or just a reload will do it?

Thanks!

Gabriel

---------- Forwarded message ----------
From: Achilleas Mantzios <achill@xxxxxxxxxxxxxxxxxxxxx>
Date: 2017-02-17 11:20 GMT-02:00
Subject: Re: Streaming Replication Without Downtime
To: pgsql-general@xxxxxxxxxxxxxx

Gabriel you are thinking this in the correct way, but its really :

pg_basebackup -D <your data dir> --write-recovery-conf --progress --xlog-method=stream -h <your primary db server>
then you just edit recovery.conf (if needed), tweak postgersql.conf (if needed) and start the standby .

On 17/02/2017 15:09, Gunnar "Nick" Bluth wrote:

(sorry for the toppost, mobile device)
What you're looking for is pg_basebackup with - - xlog=stream, I guess.

Regards,

Nick

Am 17. Februar 2017 14:06:36 MEZ schrieb Gabriel Ortiz Lour <ortiz.admin@xxxxxxxxx>:

Hi all,

  I've been searching for a way to initialize a new Hot Standby node with Streaming Replication withou the need for stop or even restarting the master.

  Of course the master is already with the needed SR configs.

  I know I have to use pg_start_backup/pg_stop_backup, but i'd like some tips, or a link to some tutorial, with the order of the steps.

  I assume will be something like:

-  configure Slave for SR

-  pg_start_backup()

-  rsync PGDATA to slave

-  start PG on the slave

-  pg_stop_backup()

  Anything i'm thinking wrong?

Thanks in advance,

Gabriel

--
Diese Nachricht wurde von meinem Android-Mobiltelefon mit K-9 Mail gesendet.

-- 
Achilleas Mantzios
IT DEV Lead
IT DEPT
Dynacom Tankers Mgmt