[GE users] fairshare fairness

Mike Brown Michael.Brown at motorola.com
Fri Feb 11 05:32:20 GMT 2005


It's running as sgeee.  

Mike

Ron Chen wrote:

>May be I am asking a stupid question...
>
>Is SGE running in SGEEE mode (can you take a look at
>the product_mode file)?
>
> -Ron
>
>--- Mike Brown <Michael.Brown at motorola.com> wrote:
>  
>
>>  I've got a question about fairshare under the
>>share tree only policy. 
>> I'm running 5.3p5.
>>
>>Suppose two users exist, and each should have 50%
>>cpu time.  User A's 
>>jobs are long, and User B's jobs are short.  If the
>>queues are full of 
>>User A's jobs and User B starts submitting jobs, the
>>share tree should 
>>allow 50% (suppose CF=1) of cpu time to User B.  
>>
>>It seems like SGE only allocates every other job to
>>User B (instead of 
>>equal cpu time).  Since B's jobs are shorter, User A
>>still gets the 
>>majority of cpu time, which is unfair.  If we set
>>CF=0, User B will 
>>dominate the queues until usage is balanced, which
>>is undesirable.  If 
>>we set CF >> 1, we either under- or over-favor B
>>depending on the ratio 
>>of A and B's job lengths.
>>
>>I'd like to give user B a short term allowance of
>>75%, though in this 
>>case, giving B 75% by job is not fair.  How can this
>>be accomplished?
>>
>>Thanks,
>>
>>Mike
>>
>>
>>
>>
>>    
>>
>---------------------------------------------------------------------
>  
>
>>To unsubscribe, e-mail:
>>users-unsubscribe at gridengine.sunsource.net
>>For additional commands, e-mail:
>>users-help at gridengine.sunsource.net
>>
>>
>>    
>>
>
>
>
>		
>__________________________________ 
>Do you Yahoo!? 
>All your favorites on one personal page - Try My Yahoo!
>http://my.yahoo.com 
>
>---------------------------------------------------------------------
>To unsubscribe, e-mail: users-unsubscribe at gridengine.sunsource.net
>For additional commands, e-mail: users-help at gridengine.sunsource.net
>  
>




More information about the gridengine-users mailing list