Re: How to store data on an external drive

Martin Gainty <mgainty@xxxxxxxxxxx> · Mon, 7 Sep 2009 22:00:07 -0400

your tables are probably not using the new default tablespace

SET default_tablespace = new_tablespace_name
any new tables will be placed into new default tablespace by inserting TABLESPACE clause
can you put the WHOLE database on the external drive?
Martin Gainty 
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> Date: Mon, 7 Sep 2009 20:20:52 -0400
> From: chen.1002@xxxxxxxxx
> To: pgsql-general@xxxxxxxxxxxxxx
> Subject:  How to store data on an external drive
> 
> Hi there,
> 
> As a beginner of PostgreSQL, I installed PostgreSQL 8.3.7 on Ubuntu 9.04 
> by using sudo apt-get install. 
> 
> Now, I want to store PostgreSQL data on an external drive because I work 
> both on my office machine and on my home machine a lot.  This way, I can 
> always bring my external drive to either location and work on data 
> stored on the drive.
> 
> I tried to use tablespaces as in 
> http://www.postgresql.org/docs/8.3/static/manage-ag-tablespaces.html.  
> But, it does not seem to work because once I create a tablespace located 
> at one folder in the external drive for one machine, I can not create a 
> tablespace located at the same folder on the other machine since the 
> folder is not empty any more.
> 
> Then, on my home machine, I copied everything in 
> /var/lib/postgresql/8.3/main to a folder on my external drive (say 
> folder /media/disk/psqldata) and edited postgresql.conf to comment out 
> line data_directory = '/var/lib/postgresql/8.3/main' and add 
> data_directory = '/media/disk/psqldata'. I am hoping that once I edit 
> postgresql.conf on my office machine the same way, it would work.  But, 
> my guess is that this won't work.
> 
> Please let me know whether this is right way to do it.  Please let me 
> know your way of doing it too.  Thanks.
> 
> Best,
> Jia
> 
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