Re: Creating new cluster by copying directory?

[Wells Oliver <wellsoliver@xxxxxxxxx>]

Hmm, is it feasible to create a new cluster by using pg_basebackup, e.g:

1. pg_createcluster 9.1 test

2. pg_basebackup --pgdata=/var/lib/postgresql/9.1/test -h localhost -p 5432

3. pg_ctlcluster 9.1 test start

Would that work?

On Thu, Jul 11, 2013 at 1:54 PM, Jerry Sievers <gsievers19@xxxxxxxxxxx> wrote:

Wells Oliver <wellsoliver@xxxxxxxxx> 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@xxxxxxxxx> 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@xxxxxxxxx
>

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

--
Wells Oliver
wellsoliver@xxxxxxxxx