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Re: Changing FS when full

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On 2010-01-21, Fernando Schapachnik <fernando@xxxxxxxxxxxx> wrote:
> Hi,
>
> I have a big database on FS1, now almost full. Have space on FS2, 
> where I created a tablespace and moved every table and index to it. 
> Still, lots of space used on FS1. The problem is not pg_xlog, but 
> base:
>
> # du -hs base/105658651/* | fgrep G
> 1,0G    base/105658651/106377323
> 1,0G    base/105658651/106377323.1
> 1,0G    base/105658651/106377323.2
> 1,0G    base/105658651/106377323.3
> 1,0G    base/105658651/106377323.4
> 1,0G    base/105658651/125520217
> 1,0G    base/105658651/127352052
> 1,0G    base/105658651/127352052.1
> 1,0G    base/105658651/127352052.2
> 1,0G    base/105658651/127352052.3
> 1,0G    base/105658651/127352052.4
> 1,0G    base/105658651/127352052.5
>
> Unfortunately no volume management is available, so I can't move 
> disks from FS2 to FS1.
>
> I could play soft links tricks, but I'm afraid of paying the 
> FS-traversal penalty on each file access (is that right?).
>
> So, any way of instructing PG (8.1 if that matters) to place those 
> files elsewhere without an initdb?

Linux has "mount -o bind" which works like a symlink, but at a lower level.
You appear to use BSD which appears to have an equivalent in nullfs.

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