Administering Platform LSF - SAS

Chapter 14
Fairshare Scheduling
SCHEDULING POLICIES: FAIRSHARE
FAIRSHARE_QUEUES: normal short license
USER_SHARES: [user1, 100] [default, 1]
SHARE_INFO_FOR: short/
USER/GROUP SHARES PRIORITY STARTED RESERVED CPU_TIME RUN_TIME
user1 100 9.645 2 0 0.2 7034
USERS: all users
HOSTS: all
...
Configuring cross-queue fairshare
Considerations ◆ FAIRSHARE must be defined in the master queue. If it is also defined in the
queues listed in FAIRSHARE_QUEUES, it will be ignored.
◆ Cross-queue fairshare can be defined more than once within lsb.queues.
You can define several sets of master-slave queues. However, a queue
cannot belong to more than one master-slave set. For example, you can
define:
❖ In master queue normal: FAIRSHARE_QUEUES=short license
❖ In master queue priority: FAIRSHARE_QUEUES= night owners
You cannot, however, define night, owners, or priority as slaves in the
normal queue; or normal, short and license as slaves in the priority
queue; or short, license, night, owners as master queues of their own.
◆ Cross-queue fairshare cannot be used with host partition fairshare. It is part
of queue-level fairshare.
Steps 1 Decide to which queues in your cluster cross-queue fairshare will apply.
For example, in your cluster you may have the queues normal, priority,
short, and license and you want cross-queue fairshare to apply only to
normal, license, and short.
2 Define fairshare policies in your master queue.
In the queue you want to be the master, for example normal, define the
following in lsb.queues:
❖ FAIRSHARE and specify a share assignment for all users of the queue.
❖ FAIRSHARE_QUEUES and list slave queues to which the defined
fairshare policy will also apply
❖ PRIORITY to indicate the priority of the queue.
Begin Queue
QUEUE_NAME = queue1
PRIORITY = 30
NICE = 20
FAIRSHARE = USER_SHARES[[user1,100] [default,1]]
FAIRSHARE_QUEUES = queue2 queue3
DESCRIPTION = For normal low priority jobs, running
only if hosts are lightly loaded.
End Queue
Administering Platform LSF 213