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IV08804: ENHANCE DISK PING DRIVER SCALABILITY APPLIES TO AIX 7100-01

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APAR status

  • Closed as program error.

Error description

  • With the current code, the number of I/Os to the repository
disk will increase as more nodes are added to the cluster,
when disk ping is used.

Local fix

  • 



Problem summary


    

  • With the current code, the number of I/Os to the repository
disk will increase as more nodes are added to the cluster,
when disk ping is used.

    



Problem conclusion


    

  • Modified the disk ping driver to coalesce the reads of the
send control blocks into one read.  The amount of data read
stays about the same as with the current driver, but the
number of I/O operations performed is reduced, and stays
constant regardless of how many nodes are in the cluster.

    



Temporary fix


    

  • 



Comments


    

  • 6100-07 - use AIX APAR IV08455
6100-07 - use AIX APAR IV08455
7100-01 - use AIX APAR IV08804

    



APAR Information




    

  • APAR number
    IV08804
    • 

  • Reported component name
    AIX V7.1
    • 

  • Reported component ID
    5765H4000
    • 

  • Reported release
    710
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Submitted date
    2011-10-05
    • 

  • Closed date
    2011-10-05
    • 

  • Last modified date
    2013-04-15
    • 





    

  • APAR is sysrouted FROM one or more of the following:
    

    
IV08455
    

    • 

  • APAR is sysrouted TO one or more of the following:
    

    • 



Fix information


    

  • Fixed component name
    AIX V7.1
    • 

  • Fixed component ID
    5765H4000
    • 



Applicable component levels


    

  • R710  PSY  U842882
       UP12/05/11  I  1000
    • 



PTF to Fileset Mapping








      
              
                            

              

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Document Information


            

            


                        

            Modified date:
            

            15 April 2013
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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