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Administering Platform LSF - SAS

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About Interactive Jobs<br />

About Interactive Jobs<br />

Scheduling policies<br />

Interactive queues<br />

It is sometimes desirable from a system management point of view to control<br />

all workload through a single centralized scheduler.<br />

Running an interactive job through the <strong>LSF</strong> batch system allows you to take<br />

advantage of batch scheduling policies and host selection features for<br />

resource-intensive jobs. You can submit a job and the least loaded host is<br />

selected to run the job.<br />

Since all interactive batch jobs are subject to <strong>LSF</strong> policies, you will have more<br />

control over your system. For example, you may dedicate two servers as<br />

interactive servers, and disable interactive access to all other servers by<br />

defining an interactive queue that only uses the two interactive servers.<br />

Running an interactive batch job allows you to take advantage of batch<br />

scheduling policies and host selection features for resource-intensive jobs.<br />

An interactive batch job is scheduled using the same policy as all other jobs in<br />

a queue. This means an interactive job can wait for a long time before it gets<br />

dispatched. If fast response time is required, interactive jobs should be<br />

submitted to high-priority queues with loose scheduling constraints.<br />

You can configure a queue to be interactive-only, batch-only, or both<br />

interactive and batch with the parameter INTERACTIVE in lsb.queues.<br />

See the <strong>Platform</strong> <strong>LSF</strong> Reference for information about configuring interactive<br />

queues in the lsb.queues file.<br />

Interactive jobs with non-batch utilities<br />

Non-batch utilities such as lsrun, lsgrun, etc., use LIM simple placement<br />

advice for host selection when running interactive tasks. For more details on<br />

using non-batch utilities to run interactive tasks, see “Running Interactive and<br />

Remote Tasks” on page 415.<br />

400<br />

<strong>Administering</strong> <strong>Platform</strong> <strong>LSF</strong>

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