OutputDir
Specifies the path of the directory
where all files are output at runtime. This directory does not need to
exist. Each process tests its existence and creates the directory if it
does not find it. Therefore, the directory will be created as many
times as necessary if the code is run on several nodes with different
associated scratch disks. The output directory can be
specified either relatively to the current working directory, or
absolutely (in which case it begins with a '/').