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IJ10416: UNEVEN DISTRIBUTION OF LOGHOME VDISK RESULTS DEGRADED PERFORMANCE

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APAR status

  • Closed as program error.

Error description

  • The loghome vdisk partition distribution are not even among
the disks of the vdisk. This causes the performance degradation
during IO.

Local fix

  • na

Problem summary

  • The loghome vdisk partition distribution are not even among
the disks of the vdisk. This causes the performance degradation
during IO.

Problem conclusion

  • The vdisk partition distributions are evenly distributed among
the disks of the vdisks. The improves the IO performance
especially for small writes.

Work around: None

Problem trigger: If any disk goes down/fail  then uneven
partition distribution occurs which causes IO performance
degradation.

Symptom: Performance Impact/Degradation

Platforms affected: All supported Operation systems.

Functional Area affected: ESS/GNR

Customer Impact: High Importance

Changed Externals: NO

Temporary fix

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    IJ10416
    • 

  • Reported component name
    SPEC SCALE STD
    • 

  • Reported component ID
    5737F33AP
    • 

  • Reported release
    502
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt / Xsystem
    • 

  • Submitted date
    2018-10-11
    • 

  • Closed date
    2018-10-11
    • 

  • Last modified date
    2019-02-12
    • 





    

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

    • 

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

    • 



Fix information


    

  • Fixed component name
    SPEC SCALE STD
    • 

  • Fixed component ID
    5737F33AP
    • 



Applicable component levels


    

  • R502  PSY  U883600
       UP18/12/18  I  1000
    • 








      
              
                            

              

              [{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"STXKQY","label":"IBM Spectrum Scale"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"502","Edition":"","Line of Business":{"code":"LOB26","label":"Storage"}}]
              

                                                                    

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            12 February 2019
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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