To: Wells Oliver <wellsoliver@gmail.com>
Cc: gilberto.castillo@etecsa.cu,  pgsql-admin@postgresql.org
Subject: Re: Creating new cluster by copying directory?
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 <CAOC+FBVXM+d4m_03xsh2MQOR24ejoLHFmw16xA5E883pRsAhng@mail.gmail.com>
From: Jerry Sievers <gsievers19@comcast.net>
Date: Thu, 11 Jul 2013 15:54:19 -0500
In-Reply-To: 
 <CAOC+FBVXM+d4m_03xsh2MQOR24ejoLHFmw16xA5E883pRsAhng@mail.gmail.com> (Wells
 Oliver's message of "Thu\, 11 Jul 2013 13\:42\:01 -0700")
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Wells Oliver <wellsoliver@gmail.com> writes:

> So it's safe to copy the files in /var/lib/postgresql/9.1/main to /var/lib/postgresql/9.1/test while main is running?

Yes, provided that you put main in backup mode and then do a PITR when
you bring up this new test instance. 

If your main DB is running but absolutely idle, you might get away
just starting it in which case the postmaster will do a regular crash
recovery but I'll presume your source instance 'main' isn't idle.

Study the manual sections relating to backup/PITR.

HTH

> On Thu, Jul 11, 2013 at 1:41 PM, Gilberto Castillo <gilberto.castillo@etecsa.cu> wrote:
>
>     > All: it would take ~4 hours to pg_restore a backup. I want to quickly
>     > create a duplicate cluster (for testing). My idea:
>     >
>     > 1. pg_ctlcreatecluster 9.1 test
>     > 2. rm /var/lib/postgresql/9.1/test/*
>     > 2. cp /var/lib/postgresql/9.1/main /var/lib/postgresql/9.1/test
>     > 3. pg_ctlcluster 9.1 test start
>     >
>     > Is this viable? If not, is there another way to create a duplicate cluster
>     > in a timely fashion?
>    
>     Test Repmgr works with the same philosophy. ;-)
>
>     Saludos,
>     Gilberto Castillo
>     La Habana, Cuba
>    
>     ---
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> --
> Wells Oliver
> wellsoliver@gmail.com
>

-- 
Jerry Sievers
Postgres DBA/Development Consulting
e: postgres.consulting@comcast.net
p: 312.241.7800


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