Re: pg_upgrade link mode

[AI Rumman <rummandba@xxxxxxxxx>]

I always think its a bit risky to use link instead of copying. However, I'd suggest to try the  --check at first of pg_upgrade.

On Thu, May 16, 2013 at 1:42 PM, Fabio Rueda Carrascosa <avances123@xxxxxxxxx> wrote:

Hello, I have a 9.1 cluster with 50 databases, only one table per db with 2000 rows only, but a lot of schema around each one (postgis databases)

The old cluster size is 1GB

du -chs /var/lib/postgresql/9.1/main/

1.1G

now I run a pg_upgrade to 9.2 with hard link mode,

pg_upgrade  --link \

    --old-datadir=/var/lib/postgresql/9.1/main \

    --new-datadir=/var/lib/postgresql/9.2/main \

    --old-bindir=/usr/lib/postgresql/9.1/bin \

    --new-bindir=/usr/lib/postgresql/9.2/bin

du -chs /var/lib/postgresql/9.2/main/

880M

Is the expected behaviour? I can't double the space in production.

Thanks.