LoadLeveler Definitions and Use LoadLeveler Definitions and Use LoadLeveler Definitions LoadLeveler Use Job Classes and Servers Selecting the right Class and Server Permissions to run Jobs Introduction to submitting jobs Introduction to programming modes Online utilization status on the SP Updated every 15 min. An overview of the different job classes and the principles of their use is expelained below. The set of classes are carefully designed to ensure that a user in need of computing resources can use a large portion of the machine if it is idle, without compromising the turnaround time of others. Any user is able to submit a job and the jobs should start to run within at most five days.
Class is the term used to designate a class of jobs.
Server is the machine that registers with the LoadLeveler system to run jobs from a given class. Requirements and Preferences allow finer and more flexible control over which server will run a job than the class. You can specify that some of the concepts below are a requirement for your job, which means the server must have the condition or feature, or that they are a preference , which means that you would like the job to run on a server that has the condition or feature, but that if another server is free, that your prefer the job to start earleir on the server without the condition or feature. There is one machine currently with a 160 MHz power2sc CPU, KWIK, but the upgrades to XENA are likely to introduce more. The operatig system can also be used to distinguish servers, but this characteristic is not used on our system.