# burst_buffer.conf

Section: File Formats (5)
Updated: January 2022
Index

## NAME

burst_buffer.conf - Slurm configuration file for burst buffer management.

## DESCRIPTION

burst_buffer.conf is an ASCII file which describes the configuration of burst buffer resource management. This file is only required on the head node(s), where the slurmctld daemon executes. The file will always be located in the same directory as the slurm.conf.

Parameter names are case insensitive. Any text following a "#" in the configuration file is treated as a comment through the end of that line. Changes to the configuration file take effect upon restart of Slurm daemons, daemon receipt of the SIGHUP signal, or execution of the command "scontrol reconfigure".

The configuration parameters available include:

AllowUsers
  Comma separated list of user names and/or IDs permitted to use burst buffers. The options AllowUsers and DenyUsers can not both be specified. By default all users are permitted to use burst buffers.

DefaultPool
  Name of the pool used by default for resource allocations. The default value is the first pool reported by the burst buffer infrastructure. This option is only used by the burst_buffer/datawarp plugin.

DenyUsers
  Colon delimited list of user names and/or IDs prevented from using burst buffers. The options AllowUsers and DenyUsers can not both be specified. By default all users are permitted to use burst buffers.

Directive
  The string that must be used by a job to request a burst buffer. This string must be immediately preceded by a single '#' character. This is currently only used by the lua plugin. For the lua plugin, the default value is "BB_LUA". See burst_buffer.html for more details.

Flags
  String used to control various functions. Multiple options may be comma separated. Supported options include:
    DisablePersistent
      Prevents regular users from being able to create and destroy persistent burst buffers. This is the default behavior, only privileged users (Slurm operators and administrators) can create or destroy persistent burst buffers.

    EmulateCray
      Emulating a Cray DataWarp system using the dw_wlm_cli script in the burst_buffer/datawarp plugin. This is only used by the datawarp plugin.

    EnablePersistent
      Enables regular users to create and destroy persistent burst buffers. By default, only privileged users (Slurm operators and administrators) can create or destroy persistent burst buffers. This is only used by the datawarp plugin.

    PrivateData
      If set, then only Slurm operators and the burst buffer owner can see burst buffer data.

    TeardownFailure
      If set, then teardown a burst buffer after file staging error. Otherwise preserve the burst buffer for analysis and manual teardown.

GetSysState
  Fully qualified path name of a program which will return the current burst buffer state. For the DataWarp plugin, this should be the path of the dw_wlm_cli command and its default value is /opt/cray/dw_wlm/default/bin/dw_wlm_cli. This is not used by the lua plugin.

GetSysStatus
  Fully qualified path name of a program which will return the current burst buffer status. For the DataWarp plugin, this should be the path of the dwstat command and its default value is /opt/cray/dws/default/bin/dwstat. This is not used by the lua plugin.

OtherTimeout
  If a burst buffer operation (other than job validation, stage in, or stage out) runs for longer than this number of seconds, the job will be placed in a held state. A Slurm administrator will be required to release the job. By default there is a 300 second (5 minute) timeout for these operations. Also see StageInTimeout, StageOutTimeout, and ValidateTimeout options. For the lua plugin, the maximum timeout value is 2073600 seconds (24 days).

PollInterval
  This option only applies to the lua plugin. If the test_data_{in|out} hooks return success and "BUSY", then they will be called again after waiting for the specified number of seconds. The default value is 15 seconds.

PrivateData
  If set to "true" then users will only be able to view burst buffers they can use. Slurm administrators will still be able to view all burst buffers. By default, users can view all burst buffers.

StageInTimeout
  If the stage in of files for a job takes more than this number of seconds, the burst buffer will be released and the job will be placed in a held state. A Slurm administrator will be required to release the job. By default there is a one day timeout for the stage in process. For the lua plugin, the maximum timeout value is 2073600 seconds (24 days).

StageOutTimeout
  If the stage out of files for a job takes more than this number of seconds, the burst buffer will be released and the job will be purged. By default there is a one day timeout for the stage out process. For the lua plugin, the maximum timeout value is 2073600 seconds (24 days).

ValidateTimeout
  If the validation of a job submission request takes more than this number of seconds, the submission will be rejected. The value of ValidateTimeout must be less than the value of MessageTimeout configured in the slurm.conf file or job submission requests may fail with a response timeout error. By default there is a 5 second timeout for the validation operations. In the lua plugin, because the validation operation cannot be killed, this option is not used.

## COPYING

Copyright (C) 2014-2022 SchedMD LLC.

This file is part of Slurm, a resource management program. For details, see <https://slurm.schedmd.com/>.

Slurm is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

Slurm is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

## SEE ALSO

slurm.conf(5)

## Index

NAME
DESCRIPTION
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SEE ALSO

This document was created by man2html using the manual pages.
Time: 17:39:23 GMT, July 13, 2025