[slurm-users] Usage of Burst Buffers (generic)

[Johan Hofmans]

Dear

We would like to start using the generic burst buffer plugin.
For this I read the burst buffer guide<https://slurm.schedmd.com/burst_buffer.html>, however I've not been able to replicate the listed examples.

In slurm.conf, the generic burst buffer was enabled via:
                BurstBufferType=burst_buffer/generic
DebugFlags=BurstBuffer
In the same directory, "burst_buffer_generic.conf", was created with:
                StageInTimeout=300
AllowUsers=centos
JobSizeLimit=200GB # Applies to each job
UserSizeLimit=500GB # Applies to each user
StartStageIn=/home/centos/stageIn.sh
(No reference is made to this file in any of the other configuration files of slurm)

When running for example:
srun --bb="capacity=1G access=striped type=scratch" ls
Or following script, executed via sbatch

        #!/bin/bash
        #BB create_persistent name=alpha capacity=32GB access=striped type=scratch
        #DW jobdw type=scratch capacity=1GB access_mode=striped
        #DW stage_in  type=file source=/home/centos/data.in  destination=$DW_JOB_STRIPED/data
        #DW stage_out type=file destination=/home/centos/data.out source=$DW_JOB_STRIPED/data
        ls
The command all executes without any errors (even when the source files are not available).
But When checking the burst buffer state via:

scontrol show burst
The output is empty.

Is there something I'm missing?
Or misconfiguring?

Thanks in advance!

Kind regards,
Johan Hofmans

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