bluegene.conf(5)

NAME
bluegene.conf - Slurm configuration file for BlueGene systems

DESCRIPTION
/etc/bluegene.conf is an ASCII file which describes BlueGene specific SLURM configuration information. This includes specifications for bgblock layout, configuration, logging, etc. The file location can be modified at system build time using the DEFAULT_SLURM_CONF parameter. The file will always be located in the same directory as the slurm.conf file.

Paramter names are case insensitive. Any text following a "#" in the configuration file is treated as a comment through the end of that line. The size of each line in the file is limited to 1024 characters. 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" unless otherwise noted.

There are some differences between Bluegene/L and Bluegene/P in respects to the contents of the bluegene.conf file.

The Bluegene/L specific options are:

AltBlrtsImage
    Alternative BlrtsImage. This is an optional field only used for mulitple images on a system and should be followed by a Groups= with the user groups allowed to use this image (i.e. Groups=da,jette) if Groups= is not stated then this image will be able to be used by all groups. You can put as many alternative images as you want in the conf file.

AltLinuxImage
    Alternative LinuxImage. This is an optional field only used for mulitple images on a system and should be followed by a Groups= with the user groups allowed to use this image (i.e. Groups=da,jette) if Groups= is not stated then this image will be able to be used by all groups. You can put as many alternative images as you want in the conf file.

AltRamDiskImage
    Alternative RamDiskImage. This is an optional field only used for mulitple images on a system and should be followed by a Groups= with the user groups allowed to use this image (i.e. Groups=da,jette) if Groups= is not stated then this image will be able to be used by all groups. You can put as many alternative images as you want in the conf file.

BlrtsImage
    BlrtsImage used for creation of all bgblocks. There is no default value and this must be specified.

LinuxImage
    LinuxImage used for creation of all bgblocks. There is no default value and this must be specified.

RamDiskImage
    RamDiskImage used for creation of all bgblocks. There is no default value and this must be specified.

The Bluegene/P specific options are:

AltCnloadImage
    Alternative CnloadImage. This is an optional field only used for mulitple images on a system and should be followed by a Groups= with the user groups allowed to use this image (i.e. Groups=da,jette) if Groups= is not stated then this image will be able to be used by all groups. You can put as many alternative images as you want in the conf file.

AltIoloadImage
    Alternative IoloadImage. This is an optional field only used for mulitple images on a system and should be followed by a Groups= with the user groups allowed to use this image (i.e. Groups=da,jette) if Groups= is not stated then this image will be able to be used by all groups. You can put as many alternative images as you want in the conf file.

CnloadImage
    CnloadImage used for creation of all bgblocks. There is no default value and this must be specified.

IoloadImage
    IoloadImage used for creation of all bgblocks. There is no default value and this must be specified.

All options below are common on all Bluegene systems:

AltMloaderImage
    Alternative MloaderImage. This is an optional field only used for mulitple images on a system and should be followed by a Groups= with the user groups allowed to use this image (i.e. Groups=da,jette) if Groups= is not stated then this image will be able to be used by all groups. You can put as many alternative images as you want in the conf file.

BasePartitionNodeCount
    The number of c-nodes per base partition. There is no default value and this must be specified. (For bgl systems this is usually 512)

BridgeAPILogFile
    Fully qualified pathname of a into which the Bridge API logs are to be written. There is no default value.

BridgeAPIVerbose
    Specify how verbose the Bridge API logs should be. The default value is 0.

    0: Log only error and warning messages

    1: Log level 0 and information messasges

    2: Log level 1 and basic debug messages

    3: Log level 2 and more debug message

    4: Log all messages

DenyPassthrough
    Specify which dimsions you do not want to allow pass throughs. Valid options are X, Y, Z or all. example: If you don't want to allow passthroughs in the X and Y diminsions you would specify DenyPassthrough=X,Y

LayoutMode
    Describes how SLURM should create bgblocks.

    STATIC: Create and use the defined non-overlapping bgblocks.

    OVERLAP: Create and use the defined bgblocks, which may overlap.
        It is highly recommended that none of the bgblocks have any passthroughs in the X-dimension. Use this mode with extreme caution.

    DYNAMIC: Create and use bglblocks as needed for each job.
        Bgblocks will not be defined in the bluegene.conf file. Dynamic partitioning may introduce fragmentation of resources and starvation of larger jobs. Use this mode with caution.

MloaderImage
    MloaderImage used for creation of all bgblocks. There is no default value and this must be specified.

NodeCardNodeCount
    Number of c-nodes per node card. There is no default value and this must be specified. (For bgl systems this is usually 32)

NumPsets
    The Numpsets used for creation of all bgblocks. This value really means the number of IOnodes on a base partition. This number must be the smallest number if you have a heterogeneous system. There is no default value and this must be specified. The typical settings for bgl systems goes as follows... For IO rich systems 64 is the value that should be used to create small blocks. For systems that are not IO rich, or you do not wish to create small blocks, 8 is usually the number to use. For bgp IO rich systems 32 is the value that should be used to create small blocks since you can only have 2 ionodes per nodecard instead of 4 like on bgl.

Each bgblock is defined by the base partitions used to construct it. Ordering is very important for laying out switch wires. Please create blocks with smap, and once done don't change the order of blocks created. A bgblock is implicitly created containing all resources on the system. Bgblocks must not overlap in static mode (except for implicitly created bgblock). This will be the case when smap is used to create a configuration file All Nodes defined here must also be defined in the slurm.conf file. Define only the numeric coordinates of the bgblocks here. The prefix will be based upon the NodeName defined in slurm.conf

BPs Define the XYZ coordinates of the bgblock end points.

Type
    Define the network connection type for the bgblock. The default value is TORUS.

    MESH: Communication occur over a mesh.

    SMALL: The base partition is divided into more than one bgblock.
        The administrator should define the number of single node cards and quarter base partition blocks using the options 32CNBlocks and 128CNBlocks respectively for a Bluegene L system. 16CNBlocks, 64CNBlocks, and 256CNBlocks are also available for Bluegene P systems. Keep in mind you must have enough ionodes to make all these configurations possible. The total number of c-nodes in defined blocks must not exceed BasePartitionNodeCnt. If not specified, the base partition will be divided into four blocks. See example below.

    TORUS: Communications occur over a torus (end-points of network
        directly connect.

EXAMPLE

##################################################################
# bluegene.conf
# build by smap on 03/06/2006
##################################################################
BridgeAPILogFile=/var/log/slurm/bridgeapi.log
BridgeAPIVerbose=2
BlrtsImage=/bgl/BlueLight/ppcfloor/bglsys/bin/rts_hw.rts
LinuxImage=/bgl/BlueLight/ppcfloor/bglsys/bin/zImage.elf
MloaderImage=/bgl/BlueLight/ppcfloor/bglsys/bin/mmcs-mloader.rts
RamDiskImage=/bgl/BlueLight/ppcfloor/bglsys/bin/ramdisk.elf
BasePartitionNodeCnt=512
NodeCardNodeCnt=32
NumPsets=64    # An I/O rich environment
LayoutMode=STATIC
##################################################################
# LEAVE AS COMMENT, Full-system bglblock, implicitly created
# BPs=[000x333] Type=TORUS # 4x4x4 = 64 midplanes
##################################################################
BPs=[000x133] Type=TORUS # 2x4x4 = 32
BPs=[200x233] Type=TORUS # 1x4x4 = 16
BPs=[300x313] Type=TORUS # 1x2x4 = 8
BPs=[320x323] Type=TORUS # 1x1x4 = 4
BPs=[330x331] Type=TORUS # 1x1x2 = 2
BPs=[332] Type=TORUS # 1x1x1 = 1
BPs=[333] Type=SMALL 32CNBlocks=4 128CNBlocks=3 # 1/16 * 4 + 1/4 * 3

COPYING
Copyright (C) 2006 The Regents of the University of California. Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER). CODE-OCEC-09-009. All rights reserved.

This file is part of SLURM, a resource management program. For details, see <https://computing.llnl.gov/linux/slurm/>.

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.

FILES
/etc/bluegene.conf

SEE ALSO

slurm.conf(5)