The page http://slurm.schedmd.com/burst_buffer.conf.html and also the man page states that the AllowUsers entry is colon separated, yet the example shows it has comma separated, which is correct. If colons are used, users cannot submit jobs: sbatch: error: Batch job submission failed: Burst Buffer permission denied
Sorry about that, it's corrected now with commit df393a4. The website copy's been updated already, and it'll be in the next 15.08 point release. - Tim