All resource managers are not created equal. There is a wide range in what capabilities are available from system to system. Additionally, there is a large body of functionality that many, if not all, resource managers have no concept of. A good example of this is job QoS. Since most resource managers do not have a concept of quality of service, they do not provide a mechanism for users to specify this information. In many cases, Moab is able to add capabilities at a global level. However, a number of features require a per job specification. Resource manager extensions allow this information to be associated with the job.
13.3.1 Resource Manager Extension Specification
Specifying resource manager extensions varies by resource manager. TORQUE, OpenPBS, PBSPro, Loadleveler, LSF, S3, and Wiki each allow the specification of an extension field as described in the following table:
Specifies that reserved resources are required to run the job. If <RSVID> is specified, then only resources within the specified reservation may be allocated. (See Job to Reservation Binding.)
EXAMPLE
NAME
BANDWIDTH
FORMAT
<DOUBLE> (in MB/s)
DEFAULT VALUE
---
DESCRIPTION
Minimum available network bandwidth across allocated resources. (See Network Management.)
EXAMPLE
NAME
DDISK
FORMAT
<INTEGER>
DEFAULT VALUE
0
DESCRIPTION
Dedicated disk per task in MB.
EXAMPLE
NAME
DEADLINE
FORMAT
[[[DD:]HH:]MM:]SS
DEFAULT VALUE
---
DESCRIPTION
Relative completion deadline of job (from job submission time).
Allows specification of job dependencies for compute or system jobs. If no ID prefix (jobname or jobid) is specified, the ID value is interpreted as a job ID.
EXAMPLE
NAME
DMEM
FORMAT
<INTEGER>
DEFAULT VALUE
0
DESCRIPTION
Dedicated memory per task in MB.
EXAMPLE
DMEM:512
NAME
FEATURE
FORMAT
<FEATURE>[{:|}<FEATURE>]...
DEFAULT VALUE
---
DESCRIPTION
Required list of node attribute/node features. NOTE: If the pipe (|) character is used as a delimiter, the features are logically OR'd together and the associated job may use resources that match any of the specified features.
generic metric requirement for allocated nodes where the requirement is specified using the format <GMNAME>[:{lt,le,eq,ge,gt,ne}<VALUE>]
DEFAULT VALUE
---
DESCRIPTION
Indicates generic constraints that must be found on all allocated nodes. If a <VALUE> is not specified, the node must simply possess the generic metric. (See Generic Metrics for more information.)
EXAMPLE
NAME
GRES and SOFTWARE
FORMAT
comma delimited list of generic resources where each resource is specified using the format <RESTYPE>[{+|:}<COUNT>][@<TIMEFRAME>]
DEFAULT VALUE
---
DESCRIPTION
Indicates generic resources required by the job on a per task basis. If a <COUNT> is not specified, the resource count defaults to 1. If the <TIMEFRAME> is specified, the generic resource is consumed from the start of the job until <TIMEFRAME> expires; otherwise the resource is consumed during the entire life of the job.
EXAMPLE
NOTE: When specifying more than 1 generic resource with -l the '%' character must be used to deliminate them.
NAME
HOSTLIST
FORMAT
'+' delimited list of hostnames
DEFAULT VALUE
---
DESCRIPTION
Indicates an exact set, superset, or subset of nodes on which the job must run. NOTE: Use the carot (^) or asterisk (*) characters to specify a host list as superset or subset respectively.
EXAMPLE
NAME
JGROUP
FORMAT
<JOBGROUPID>
DEFAULT VALUE
---
DESCRIPTION
ID of job group to which this job belongs (different from the GID of the user running the job).
EXAMPLE
JGROUP:bluegroup
NAME
JOBFLAGS (aka FLAGS)
FORMAT
one or more of the following colon delimited job flags including ADVRES[:RSVID], NOQUEUE, NORMSTART, PREEMPTEE, PREEMPTOR, RESTARTABLE, SUSPENDABLE or COALLOC (see job flag overview for a complete listing)
DEFAULT VALUE
---
DESCRIPTION
Associates various flags with the job.
EXAMPLE
NAME
LATENCY
FORMAT
<DOUBLE> (in microseconds)
DEFAULT VALUE
---
DESCRIPTION
Maximum average network latency across allocated resources. (See Network Management.)
EXAMPLE
NAME
LOGLEVEL
FORMAT
<INTEGER>
DEFAULT VALUE
---
DESCRIPTION
Per job log verbosity.
EXAMPLE
Job events and analysis will be logged with level 5 verbosity.
NAME
MAXMEM
FORMAT
>INTEGER< (in megabytes)
DEFAULT VALUE
---
DESCRIPTION
Maximum amount of memory the job may consume across all tasks before the JOBMEM action is taken.
EXAMPLE
If a RESOURCELIMITPOLICY is set for per-job memory utilization, its action will be taken when this value is reached.
NAME
MAXPROC
FORMAT
>INTEGER<
DEFAULT VALUE
---
DESCRIPTION
Maximum CPU load the job may consume across all tasks before the JOBMEM action is taken.
EXAMPLE
If a RESOURCELIMITPOLICY is set for per-job processor utilization, its action will be taken when this value is reached.
NAME
MINPREEMPTTIME
FORMAT
[[DD:]HH:]MM:]SS
DEFAULT VALUE
---
DESCRIPTION
Minimum time job must run before being eligible for preemption.
NOTE: Can only be specified if associated QoS allows per-job preemption configuration by setting the preemptconfig flag.
EXAMPLE
Job cannot be preempted until it has run for 15 minutes.
NAME
MINPROCSPEED
FORMAT
<INTEGER>
DEFAULT VALUE
0
DESCRIPTION
Minimum processor speed (in MHz) for every node that this job will run on.
EXAMPLE
Every node that runs this job must have a processor speed of at least 2000 MHz.
NAME
MINWCLIMIT
FORMAT
[[DD:]HH:]MM:]SS
DEFAULT VALUE
1:00:00
DESCRIPTION
Minimum wallclock limit job must run before being eligible for extension. (See JOBEXTENDDURATION.)
EXAMPLE
Job will run for at least 300 seconds but up to 16,000 seconds if possible (without interfering with other jobs).
NAME
MSTAGEIN
FORMAT
[<SRCURL>[|<SRCRUL>...],]<DSTURL>
DEFAULT VALUE
---
DESCRIPTION
Indicates whether a job has data staging requirements. If more than one source URL is specified, the destination URL must be a directory.
The format of <SRCURL> is:[PROTO://][HOST][:PORT]][/PATH] where the path is local.
The format of <DSTURL> is:[PROTO://][HOST][:PORT]][/PATH] where the path is remote.
PROTO can be any of the following protocols: ssh, file, or gsiftp.
HOST is the name of the host where the file resides.
PATH is the path of the source or destination file. The destination path may be a directory when sending a single file and must be a directory when sending multiple files. If a directory is specified, it must end with a forward slash (/).
NOTE: If no destination is given, the protocol and file name will be set to the same as the source.
EXAMPLE
Copy test1.sh and test2.sh from the local machine to /home/dev/ on host.
NAME
MSTAGEOUT
FORMAT
[<SRCURL>[|<SRCRUL>...],]<DSTURL>
DEFAULT VALUE
---
DESCRIPTION
Indicates whether a job has data staging requirements. If more than one source URL is specified, the destination URL must be a directory.
The format of <SRCURL> is:[PROTO://][HOST][:PORT]][/PATH] where the path is remote.
The format of <DSTURL> is:[PROTO://][HOST][:PORT]][/PATH] where the path is local.
PROTO can be any of the following protocols: ssh, file, or gsiftp.
HOST is the name of the host where the file resides.
PATH is the path of the source or destination file. The destination path may be a directory when sending a single file and must be a directory when sending multiple files. If a directory is specified, it must end with a forward slash (/).
Specifies how node resources should be accessed. (See Node Access Policies for more information).
NOTE: The naccesspolicy option can only be used to make node access more constraining than is specified by the system, partition, or node policies. If the effective node access policy is shared, naccesspolicy can be set to singleuser, if the effective node access policy is singlejob, naccesspolicy can be set to singletask.
EXAMPLE
Job cannot only allocate free nodes or nodes running jobs by same user.
Specifies the partition (or partitions) in which the job must run.
NOTE: The job must have access to this partition based on system wide or credential based partition access lists.
EXAMPLE
The job must only run in the math partition or the geology partition.
NAME
PREF
FORMAT
<STRING>[:<STRING>]...
DEFAULT VALUE
---
DESCRIPTION
Specifies which node features are preferred by the job and should be allocated if available. If preferred node criteria are specified, Moab favors the allocation of matching resources but is not bound to only consider these resources.
NOTE: Preferences are not honored unless the node allocation policy is set to PRIORITY and the PREF priority component is set within the node's PRIORITYF attribute.
EXAMPLE
The job may run on any nodes but prefers to allocate nodes with the bigmem feature.
NAME
QoS
FORMAT
<STRING>
DEFAULT VALUE
---
DESCRIPTION
EXAMPLE
NAME
QUEUEJOB
FORMAT
<BOOLEAN>
DEFAULT VALUE
TRUE
DESCRIPTION
Indicates whether or not the scheduler should queue the job if
resources are not available to run the job immediately
EXAMPLE
QUEUEJOB:FALSE
NAME
REQATTR
FORMAT
Required node attributes with version number support: <ATTRIBUTE>[{>=|>|<=|<|=}<VERSION>]
DEFAULT VALUE
---
DESCRIPTION
Indicates required node attributes.
EXAMPLE
NAME
RESFAILPOLICY
FORMAT
one of CANCEL, HOLD, IGNORE, NOTIFY, or REQUEUE
DEFAULT VALUE
---
DESCRIPTION
Specifies the action to take on an executing job if one or more allocated nodes fail. This setting overrides the global value specified with the NODEALLOCRESFAILUREPOLICY parameter.
EXAMPLE
For this particular job, ignore node failures.
NAME
RMTYPE
FORMAT
<STRING>
DEFAULT VALUE
---
DESCRIPTION
One of the resource manager types currently available within the cluster or grid. Typically, this is one of PBS, LSF, LL, SGE,
SLURM, BProc, Condor, and so forth.
EXAMPLE
Only run job on a Loadleveler destination resource manager.
NAME
SID
FORMAT
<STRING>
DEFAULT VALUE
---
DESCRIPTION
EXAMPLE
NAME
SIGNAL
FORMAT
<INTEGER>[@<OFFSET>]
DEFAULT VALUE
---
DESCRIPTION
Specifies the pre-termination signal to be sent to a job prior to it reaching its walltime limit or being terminated by Moab. The optional offset value specifies how long before job termination the signal should be sent. By default, the pre-termination signal is sent one minute before a job is terminated
EXAMPLE
NAME
SPRIORITY
FORMAT
<INTEGER>
DEFAULT VALUE
0
DESCRIPTION
Allows Moab administrators to set a system priority on a job.
(similar to setspri)
Specifies the time at which Moab should cancel a queued or active job. (See Job Deadline Support.)
EXAMPLE
NAME
TPN
FORMAT
<INTEGER>[+]
DEFAULT VALUE
0
DESCRIPTION
Tasks per node allowed on allocated hosts. If the plus (+) character is specified, the tasks per node value is interpreted as a minimum tasks per node constraint; otherwise it is interpreted as an exact tasks per node constraint.
NOTE on Differences between TPN and PPN:
There are two key differences between the following: (A) qsub -l nodes=12:ppn=3 and (B) qsub -l nodes=12,tpn=3
The first difference is that ppn is interpreted as the minimum required tasks per node while tpn defaults to exact tasks per node; case (B) executes the job with exactly 3 tasks on each allocated node while case (A) executes the job with at least 3 tasks on each allocated node—nodeA:4,nodeB:3,nodeC:5
The second major difference is that the line, nodes=X:ppn=Y actually requests X*Y tasks, whereas nodes=X,tpn=Y requests only X tasks.
NOTE: Job triggers can only be specified if allowed by the QoS flag trigger.
EXAMPLE
NAME
TRL (Format 1)
FORMAT
<INTEGER>[@<INTEGER>][:<INTEGER>[@<INTEGER>]]...
DEFAULT VALUE
0
DESCRIPTION
Specifies alternate task requests with their optional walltimes. (See Malleable Jobs.)
EXAMPLE
or
NAME
TRL (Format 2)
FORMAT
<INTEGER>-<INTEGER>
DEFAULT VALUE
0
DESCRIPTION
Specifies a range of task requests that require the same walltime. (See Malleable Jobs.)
EXAMPLE
NOTE: For optimization purposes Moab does not perform an exhaustive search of all possible values but will at least do the beginning, the end, and 4 equally distributed choices in between.
NAME
TTC
FORMAT
<INTEGER>
DEFAULT VALUE
0
DESCRIPTION
Total tasks allowed across the number of hosts requested. TTC is supported in the Wiki resource manager for SLURM. Compressed output must be enabled in the moab.cfg file. (See SLURMFLAGS for more information). NODEACCESSPOLICY should be set to SINGLEJOB and JOBNODEMATCHPOLICY should be set to EXACTNODE in the moab.cfg file.
EXAMPLE
NOTE: In this example, assuming all the nodes are 8 processor nodes, the first allocated node will have 10 tasks, the next node will have 2 tasks, and the remaining 8 nodes will have 1 task each for a total task count of 20 tasks.
NAME
VAR
FORMAT
<ATTR>:<VALUE>
DEFAULT VALUE
---
DESCRIPTION
Adds a generic variable to the job.
EXAMPLE
VAR:applicationtype:blast
13.3.3 Resource Manager Extension Examples
If more than one extension is required in a given job,
extensions can be concatenated with a semicolon separator using the format
<ATTR>:<VALUE>[;<ATTR>:<VALUE>]...
Example 1
Job must run on nodes node1 and node2 using the QoS special. The job is also associated with the
system ID silverA allowing the silver daemon to monitor and control the job.
Example 2
Job will have resources allocated subject to network based nodeset constraints. Further, each task will dedicate 64 MB of
memory.
Example 3
Job will be forced to run within the john.1 reservation.