Thanks, William. That's just what I needed. -Rob
On Feb 22, 6:18 pm, William Stein <[email protected]> wrote:
> On Sun, Feb 22, 2009 at 6:13 PM, Rob Beezer <[email protected]> wrote:
>
> > Does Sage use some sort of cache or swap space in your home directory
> > when working at the Sage command line?
>
> > I keep my home directory on a small USB portable notebook hard drive
> > and when doing timing experiments with large matrices (25 million
> > rational entries on a machine with 8 GB) I get noticeably slower
> > results and see more disk activity through the one light on the
> > drive. If I run Sage as root, so the home directory is on the system
> > disk, performance is more in line with expectations and there's no
> > apparent disk activity on my external drive.
>
> Yes, Sage extensively uses $HOME/.sage by default for local disk files, etc.
> If you do
> export DOT_SAGE=whatever/directory/you/want
> it will use that instead.
>
> If you *must* use $HOME/.sage you could at least symlink
> $HOME/.sage/temp to /tmp/sage say by typing
>
> cd $HOME/.sage
> rm -rf temp
> ln -s /tmp/sage temp
>
> William
>
>
>
> > If this is the case, is there a configuration or environment variable
> > to control the location of the disk activity? I haven't been able to
> > find anything of the sort.
>
> > Thanks in advance,
> > Rob
>
> --
> William Stein
> Associate Professor of Mathematics
> University of Washingtonhttp://wstein.org
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