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Re: tablespace restore

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On 11/19/2010 03:12 PM, Matthew Walden wrote:
Vangelis,

I don't believe you can do file level copying of single databases
(especially as they are different versions).

Hi Matthew, thanks for your answer.

If the different versions is a problem, I can downgrade one server and then upgrade afterwards.

Take a look at pg_dump in the documentation.  This will do what you need I
think but at a logical level rather than physical.

Hm, from what I understand pg_dump doesn't dump indexes (ie the indexing information - not an SQL clause in CREATE TABLE). Also I have lots of Giga of data, so I imagine that pg_restore will take quite some time to execute the INSERTs and reindex.

Regards
Vangelis


On Fri, Nov 19, 2010 at 11:52 AM, Vangelis Katsikaros<ibob17@xxxxxxxx>wrote:

Hello

I use postgres 8.3.12 on machineA and 8.4.5 on machineB.

On machineA I have created a tablespace with
CREATE TABLESPACE tablelocation_name LOCATION '/my/location/machineA';

I then created a database with
CREATE DATABASE db_name TABLESPACE tablelocation;

I created tables, inserted data and created indexes.

I now want to "move" the db from '/my/location/machineA' of machine A to
'/other/location/machineB' of machine B. My question is how I can do a
filesystem backup/restore (I want to move the indexes too - too time
consuming to reindex).

Machine B already has a postgres running, and postgres on machine B already
has other databases. During this process I have no problem of shutting down
postgres.


I have tried some things unsuccessfully:
1)  - stop postgres on machine B
    - copy dir of tablelocation of machine A to '/other/location/machineB'
on machine B
    - start postgres on machine B
    - CREATE TABLESPACE tablelocation_name LOCATION
'/other/location/machineB';
      ERROR:  directory "/other/location/machineB" is not empty


Regards
Vangelis

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