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IZ86583: V3 NFS EXPORTED VERITAS FS WITH DSYNC HAS SLOW PERFORMANCE APPLIES TO AIX 6100-05

A fix is available

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • Version 3 NFS exported Veritas filesystem has slow
    performance with
    dsync option. This is caused by an additional open and
    close done before
    a read or write operation.  This additional open and
    close is done for
    performance optimization by other types of
    filesystems(gpfs) and is not
    needed by Veritas.  J2 already is coded not to do it.
    Customer asked for
    a test nfs extension which allowed Veritas to avoid
    unnecessary path and
    it was successfully tested to improve performance without
    side affects.
    

Local fix

  • No local fix.
    

Problem summary

  • Copying a file raises CPU usage to 100% on the server.
    The client hangs and then times out.
    

Problem conclusion

  • Avoid doing additional open/close before a read or write call
    

Temporary fix

Comments

  • 5300-10 - use AIX APAR IZ98366
    5300-11 - use AIX APAR IZ98454
    5300-12 - use AIX APAR IZ98090
    6100-03 - use AIX APAR IZ97808
    6100-04 - use AIX APAR IZ97663
    6100-05 - use AIX APAR IZ86583
    6100-06 - use AIX APAR IZ94570
    

APAR Information

  • APAR number

    IZ86583

  • Reported component name

    AIX 610 STD EDI

  • Reported component ID

    5765G6200

  • Reported release

    610

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Submitted date

    2010-10-12

  • Closed date

    2011-02-21

  • Last modified date

    2013-04-11

Fix information

  • Fixed component name

    AIX 610 STD EDI

  • Fixed component ID

    5765G6200

Applicable component levels

  • R610 PSY U841777

       UP11/05/19 I 1000

PTF to Fileset Mapping

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Document Information

Modified date:
11 April 2013