[HEADS-UP] Rawhide: /tmp is now on tmpfs

Richard W.M. Jones rjones at redhat.com
Thu May 31 19:33:51 UTC 2012

On Thu, May 31, 2012 at 11:45:36AM +0100, Pádraig Brady wrote:
> On 05/31/2012 08:14 AM, Roberto Ragusa wrote:
> > On 05/31/2012 02:40 AM, Lennart Poettering wrote:
> >> Heya!
> >>
> >> Please be aware that since the most recent systemd uploads /tmp is now
> >> in tmpfs by default in Rawhide/F18.
> > [...]
> >> This will most likely lead to a problem or two with software that isn't
> >> happy about /tmp being small.
> > 
> > For example "sort".
> This is a good example because `sort` algorithmically needs
> something below RAM in the memory hierarchy (i.e. bigger),
> but with the same persistence characteristics of /tmp.
> Currently `sort` defaults to $TMPDIR or if not set '/tmp'.

libguestfs has roughly the same problem as 'sort'.  It's unfortunate
the $TMPDIR doesn't communicate any information about the availability
of temporary directories of different types.

I sometimes thing that having optional $PERSISTENT_TMPDIR (a pointer
to a directory that persists for some time) and $ONDISK_TMPDIR (a
directory that is on a slower medium than RAM) would be useful.


Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
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