RQS Common Uses

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Revision as of 22:52, 31 March 2007 by 66.92.70.111 (talk) (Global limits on maximum user jobs)
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Note: this is a draft page where I'm trying to document probable common use cases for the new Resource Quota Syntax that will appear in Grid Engine 6.1. Don't link to this yet :) --Dag 11:54, 20 December 2006 (EST)


Per User Limits

Global limits on maximum user jobs

It is now possible to set limits on a per-user basis rather than just having one global value that affects everyone.

{
   name         max_per_user
   description  "per user rule sets"
   enabled      TRUE
   limit        users dag to slots=1
}

Max user jobs in a particular queue

Note that the keyword "queues" refers to a Grid Engine cluster queue

{
   name         max_per_queue
   description  NONE
   enabled      TRUE
   limit        users dag queues all.q to slots=2
   limit        users dag queues testQueue to slots=1
}

Max user jobs on a particular execution host

{
 name max_per_host
 enabled TRUE
 limit users dag hosts chrisdag-laptop to slots=2
}

The RQS Design Specification document contains the following more complicated example:

  1. All users together should never take more than 20 slots
  2. All users should maximal take 5 slots on all linux hosts
  3. Every user is restricted to one slot per linux host, only user "roland" is restricted to 2 slots and all other slots on hosts are set to 0

In that case, the ruleset would look like this, note that "@linux" is a predefined hostgroup:

{
 name maxujobs
 limit users * to slots=20
}

{
 name max_linux
 limit users * hosts @linux to slots=5
}

{
 name max_per_host
 limit users roland hosts {@linux} to slots=2
 limit users {*} hosts {@linux} to slots=1
 limit users * hosts * to slots=0
}