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IT03230: NDMP FILE LEVEL NAS RESTORE FROM WEB CLIENT MAY BE SLOW FOR NDMP FILER-TO-SERVER BACKUPS.

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APAR status

  • Closed as program error.

Error description

  • Using the Tivoli Storage Manager Web client to perform a NetApp
    NAS file level restore, the restore may be slow.
    
    The slow restore performance will only be seen for NDMP backups
    that reside in a native Tivoli Storage Manager storage pool
    (its for NDMP filer-to-server backups).
    
    Backups directly to tape drives are not affected
    (when DATAFORMAT in the storage pool definition is NETAPPDump,
     CELERRADump or NDMPDump).
    
    The performance degradation becomes more noticeable for larger
    backups with a large amount of files.
    
    Customer/L2 Diagnostics:
    Example from a server trace with traceflag SPI during a file
    level NDMP filer-to-server restore:
    It will show a 3 second delay between the processing of each
    NOTIFY_DATA_READ message:
    
    09:08:40.236 [74792][ndmpspi.c][2968][spiTrace]: NOTIFY DATA
    READ (offset: 394240, Len: 262144) received Obj HdrLen: 1700, on
    session 1157e9a68.
    09:08:43.324 [74792][ndmpspi.c][2968][spiTrace]: NOTIFY DATA
    READ (offset: 656384, Len: 327680) received Obj HdrLen: 1700, on
    session 1157e9a68.
    09:08:46.360 [74792][ndmpspi.c][2968][spiTrace]: NOTIFY DATA
    READ (offset: 984064, Len: 393216) received Obj HdrLen: 1700, on
    session 1157e9a68.
    09:08:49.420 [74792][ndmpspi.c][2968][spiTrace]: NOTIFY DATA
    READ (offset: 1377280, Len: 458752) received Obj HdrLen: 1700,
    on session 1157e9a68.
    09:08:52.430 [74792][ndmpspi.c][2968][spiTrace]: NOTIFY DATA
    READ (offset: 1836032, Len: 524288) received Obj HdrLen: 1700,
    on session 1157e9a68.
    
    For a relatively large NDMP image the server will have to
    process several thousands of these messages. The three second
    delay is unnecessary and prevents the server from processing
    the messages as efficiently as possible.
    
    Tivoli Storage Manager Versions Affected:
    Tivoli Storage Manager Server 6.2 6.3 and 7.1 on all supported
    platforms
    
    Initial Impact:
    medium
    
    Additional Keywords:
    TSM zz62 zz63 zz71 ndmp nas restore web
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * All Tivoli Storage Manager server users of NDMP backup and   *
    * restore operations.                                          *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See Error Description                                        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * Apply fixing level when available. This problem is currently *
    * projected to be fixed in levels 6.3.6 and 7.1.3.  Note that  *
    * this is subject to change at the discretion of IBM.          *
    ****************************************************************
    

Problem conclusion

  • The problem was fixed.
    Affected platforms: AIX, HP-UX, Solaris, Linux and Windows.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT03230

  • Reported component name

    TSM SERVER

  • Reported component ID

    5698ISMSV

  • Reported release

    63A

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2014-07-21

  • Closed date

    2014-09-24

  • Last modified date

    2015-01-28

  • 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

    TSM SERVER

  • Fixed component ID

    5698ISMSV

Applicable component levels

  • R62A PSY

       UP

  • R62H PSY

       UP

  • R62L PSY

       UP

  • R62S PSY

       UP

  • R62W PSY

       UP

  • R63A PSY

       UP

  • R63H PSY

       UP

  • R63L PSY

       UP

  • R63S PSY

       UP

  • R63W PSY

       UP

  • R71A PSY

       UP

  • R71H PSY

       UP

  • R71L PSY

       UP

  • R71S PSY

       UP

  • R71W PSY

       UP



Document information

More support for: Tivoli Storage Manager

Software version: 63A

Reference #: IT03230

Modified date: 28 January 2015