Thread: Dynamic Queue Configuration in LSF

LSF Queue parameter - QJOB_LIMIT and UJOB_LIMIT seems to bring down my LSF Queue efficiency quite a bit and we need to manually change these two limits to optimize the queue.

Example: If I have 10 license for a specific application and
QJOB_LIMIT = 10
UJOB_LIMIT = 5

If 2 users submit 5 jobs each Queue has served its purpose but if
1 user submits 10 jobs. now because of the UJOB_LIMIT = 5
5/10 of the expensive license sits idle until some one changes the UJOB_LIMIT = 10 and reconfigures the queue.

Engineering departments want to limit per user license consumption.

Does any one know any dynamic solution for changing these parameters ?
Based on demands
Any suggestions ?
Any perl modules available that can do this ?

Thanks.

Are you defining the license as a resource in LSF? If you don then you don't really need to set QJOB_LIMIT, you just give a value 10 to your license resource or an elim , then use RES_REQ variable in the queue configuration to say every job requires 1 of that resource. When all the licenses are used, other jobs will remain pending till it's free.

If the reason for setting UJOB_LIMIT is to prevent a user from monopolizing the licenses, then maybe you can try setting a fairshare policy instead with equal share to every user e.g. default, 1 .

This should solve your issue.

Of course the best way is to use License Scheduler to manage your engineering licenses (FlexLM) , it allows you to set shares/ownership for licenses. You can see a demo at platformdemos.com and more info at Platform website.