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Administering Platform LSF - SAS

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User Share Assignments<br />

Syntax<br />

Chapter 14<br />

Fairshare Scheduling<br />

Both queue-level and host partition fairshare use the following syntax to define<br />

how shares are assigned to users or user groups.<br />

[user, number_shares]<br />

Enclose each user share assignment in square brackets, as shown. Separate<br />

multiple share assignments with a space between each set of square brackets.<br />

◆ user<br />

Specify users of the queue or host partition. You can assign the shares:<br />

❖ to a single user (specify user_name)<br />

❖ to users in a group, individually (specify group_name@) or collectively<br />

(specify group_name)<br />

❖ to users not included in any other share assignment, individually<br />

(specify the keyword default) or collectively (specify the keyword<br />

others)<br />

By default, when resources are assigned collectively to a group, the group<br />

members compete for the resources according to FCFS scheduling. You can<br />

use hierarchical fairshare to further divide the shares among the group<br />

members.<br />

When resources are assigned to members of a group individually, the share<br />

assignment is recursive. Members of the group and of all subgroups always<br />

compete for the resources according to FCFS scheduling, regardless of<br />

hierarchical fairshare policies.<br />

◆ number_shares<br />

Specify a positive integer representing the number of shares of cluster<br />

resources assigned to the user.<br />

The number of shares assigned to each user is only meaningful when you<br />

compare it to the shares assigned to other users, or to the total number of<br />

shares. The total number of shares is just the sum of all the shares assigned<br />

in each share assignment.<br />

<strong>Administering</strong> <strong>Platform</strong> <strong>LSF</strong> 203

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