Re: PITR Setup Using Hot StandBy

["Vicky Soni - Quipment India" <vicky.soni@xxxxxxxxxxx>]

Hi,

 

             Basically I do not want to touch my Master while performing PITR.

 

So here what I am trying to achieve now in my development environment.

 

1.       Take base backup from slave

2.       Do WAL archiving from master

3.       Try to up postgresql using base backup from slave and wal archives from master.

 

I don’t know, if this will work or not.

 

But my final goal is to setup entire PITR process using base backup from slave.

 

                                                                                             

 

Thanks & Regards,

Vicky Soni
Database Administrator

 

From: Scott Whitney [mailto:scott@xxxxxxxxxxx]
Sent: 24 May 2016 21:18
To: Dave Johansen <davejohansen@xxxxxxxxx>; Vicky Soni - Quipment India <vicky.soni@xxxxxxxxxxx>
Cc: pgsql-admin@xxxxxxxxxxxxxx
Subject: Re: PITR Setup Using Hot StandBy

 

Hi, Dave.

 

It depends on what you're trying to do.

 

If you want a slave up in real-time replication mode, that's by far the simplest setup.

 

The concept is:

1) start a backup

 

select pg_start_backup("myslave"),true);

 

2) Rsync (or tar) your pg data directory over to your slave.

 

3) select pg_stop_backup();

 

4) Tell your slave how to connect to the master

 

Start your slave.

 

This is a pretty straight-forward link for this:

 

https://opensourcedbms.com/dbms/how-to-do-point-in-time-recovery-with-postgresql-9-2-pitr-3/

How to do point in time recovery with PostgreSQL 9.2 ... opensourcedbms.com This post describes how to do point in time recovery with PostgreSQL 9.2 : PITR. Point in time recovery (PITR) simply means restoring data upto certain point in time.

 

 

If you want to do something "clever," like offset how far behind the slave is, that's more complex.

 

---

From: pgsql-admin-owner@xxxxxxxxxxxxxx <pgsql-admin-owner@xxxxxxxxxxxxxx> on behalf of Dave Johansen <davejohansen@xxxxxxxxx>
Sent: Tuesday, May 24, 2016 10:31 AM
To: Vicky Soni - Quipment India
Cc: pgsql-admin@xxxxxxxxxxxxxx
Subject: Re: PITR Setup Using Hot StandBy

 

On Tue, May 24, 2016 at 6:05 AM, Vicky Soni - Quipment India <vicky.soni@xxxxxxxxxxx> wrote:

Hello Friends,

 

                       I need to setup PITR. Using master, I am able to do wal archiving.

But using slave I am not able to archive WAL files.

 

Can anyone please guide me, how to setup PITR using Hot StandBy?

 

I have setup LogShpping + Streaming Replication in my dev environment, now using this slave I want to setup PITR.

 

I have already setup following parameters:

 

wal_level = hot_standby

 

archive_mode = on

 

archive_command = 'copy "c:\\Program Files\\PostgreSQL\\9.4\\data\\%p" "\\\\192.168.170.221\\Primary_WAL_Archive\\%f"'

 

max_wal_senders = 3

 

wal_keep_segments = 8

 

hot_standby = on

 

Any help is appreciated.

http://www.postgresql.org/docs/9.2/static/continuous-archiving.html

The standby/slave is read only and does not generate WAL files (it only consumes them to stay in sync with the master).

 

 

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