IOR fails on call to statfs()

[CamStan]

When using IOR to write to a test file to a non-existent mount point (i.e., /unifycr), IOR calls statfs().

srun -N4 -n4 ior -w -r -o /unifycr/testfile

This resulted in an IOR error as we currently do not have a wrapper for this function.

ior ERROR: unable to statfs() file system, errno 2, No such file or directory (utilities.c:376)
application called MPI_Abort(MPI_COMM_WORLD, -1) - process 0

IOR user guide found here.

[adammoody]

Nice find, @CamStan! Assuming this is not already done or underway by someone else, this would be a good introduction to creating and testing a new wrapper. I can help you work through that.

[CamStan]

UnifyFS has been run with IOR successfully since this issue. Warnings/errors can possibly still show up when doing so, but setting UNIFYFS_CLIENT_SUPER_MAGIC=off should work around this.