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| -rw-r--r-- | lib/spack/docs/basic_usage.rst | 31 |
1 files changed, 22 insertions, 9 deletions
diff --git a/lib/spack/docs/basic_usage.rst b/lib/spack/docs/basic_usage.rst index 58e67e4550..f08a2bb675 100644 --- a/lib/spack/docs/basic_usage.rst +++ b/lib/spack/docs/basic_usage.rst @@ -1246,13 +1246,30 @@ several variants: spack deactivate -a python -A word of warning ------------------------ +Filesystem requirements +-------------------------- -If you run `spack find` and you get an error similar to the following: +Spack currently needs to be run from a filesystem that supports +``flock`` locking semantics. Nearly all local filesystems and recent +versions of NFS support this, but parallel filesystems may be mounted +without ``flock`` support enabled. You can determine how your +filesystems are mounted with ``mount -p``. The output for a Lustre +filesystem might look like this: .. code-block:: sh - + + $ mount -l | grep lscratch + pilsner-mds1-lnet0@o2ib100:/lsd on /p/lscratchd type lustre (rw,nosuid,noauto,_netdev,lazystatfs,flock) + porter-mds1-lnet0@o2ib100:/lse on /p/lscratche type lustre (rw,nosuid,noauto,_netdev,lazystatfs,flock) + +Note the ``flock`` option on both Lustre mounts. If you do not see +this or a similar option for your filesystem, you may need ot ask your +system administrator to enable ``flock``. + +This issue typically manifests with the error below: + +.. code-block:: sh + $ ./spack find Traceback (most recent call last): File "./spack", line 176, in <module> @@ -1273,11 +1290,7 @@ If you run `spack find` and you get an error similar to the following: fcntl.lockf(self._fd, op | fcntl.LOCK_NB) IOError: [Errno 38] Function not implemented - -it most likely means that you are trying to run spack in a shared -network filesystem without support for lockf/flock. Currently this is not -supported, and you should ask your system administrator to enable lockf/flock. - +A nicer error message is TBD in future versions of Spack. Getting Help ----------------------- |