Queue-level resource requirements
Each queue can define resource requirements that apply to all the jobs in the queue.
When resource requirements are specified for a queue, and no job-level or application profile resource requirement is specified, the queue-level resource requirements become the default resource requirements for the job.
Resource requirements determined by the queue no longer apply to a running job after running badmin reconfig, For example, if you change the RES_REQ parameter in a queue and reconfigure the cluster, the previous queue-level resource requirements for running jobs are lost.
Syntax
The condition for dispatching a job to a host can be specified through the queue-level RES_REQ parameter in the queue definition in lsb.queues. Queue-level RES_REQ rusage values must be in the range set by RESRSV_LIMIT (set in lsb.queues), or the queue-level RES_REQ is ignored.
Examples
RES_REQ=select[((type==LINUX2.4 && r1m < 2.0)||(type==AIX && r1m < 1.0))]
This allows a queue, which contains LINUX2.4 and AIX hosts, to have different thresholds for different types of hosts.
RES_REQ=select[((hname==hostA && mem > 50)||(hname==hostB && mem > 100))]
Using the hname resource in the resource requirement string allows you to set up different conditions for different hosts in the same queue.
Load thresholds
Load thresholds can be configured by your LSF administrator to schedule jobs in queues. Load thresholds specify a load index value.
loadSched
The scheduling threshold that determines the load condition for dispatching pending jobs. If a host’s load is beyond any defined loadSched, a job is not started on the host. This threshold is also used as the condition for resuming suspended jobs.
loadStop
The suspending condition that determines when running jobs should be suspended.
Thresholds can be configured for each queue, for each host, or a combination of both. To schedule a job on a host, the load levels on that host must satisfy both the thresholds configured for that host and the thresholds for the queue from which the job is being dispatched.
The value of a load index may either increase or decrease with load, depending on the meaning of the specific load index. Therefore, when comparing the host load conditions with the threshold values, you need to use either greater than (>) or less than (<), depending on the load index.