`mktemp -d` lands in `/tmp`, which on this and most current Linux
distributions is a tmpfs — memory, not disk, sized at half of RAM. The
venv this script builds installs torch into it, several gigabytes, and
the failure mode is not subtle:
error: Failed to install: torch-2.13.0-...whl
Caused by: No space left on device (os error 28)
on a machine with 102 GB free on the filesystem holding `/var/tmp`. The
quieter version of the same bug is worse: when it does fit, it evicts
whatever the user had in page cache to make room.
`${TMPDIR:-/var/tmp}` respects an explicit TMPDIR and otherwise picks the
disk-backed directory, which is what a multi-gigabyte throwaway wants.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
dtourolleandClaude Opus 5
2e09906a08