IBM Support

IC98542: DOCUMENTATION OF STORAGE POOL "MAXSIZE" PARAMETER MUST BE ENHANCED TO EXPLAIN HANDLING OF COMPRESSED FILES

Subscribe

You can track all active APARs for this component.

APAR status

  • Closed as documentation error.

Error description

  • The documentation of the Tivoli Storage Manager Server storage
    pool parameter MAXSIZE must be extended to explain the handling
    of compressed files i.e. the client uses the client option
    "COMPRESSION YES".
    
    The client informs during backup or archive operation the
    server of the files size to be transmitted. This file size is
    the real file size before compression. This real file size
    before compression is being used by the server for the parameter
    MAXSIZE in the storage pool definition.
    
    Customer/L2 Diagnostics :
    Example:
    The MAXSIZE limit in the primary storage pool is set to 100 MB.
    So for all files with a size larger than 100 MB, the defined
    next storage pool will be used for backup or archive operations.
    
    If a file with a real size before compression is for example
    192 MB and the physical (compressed) size is for example 74 MB,
    it will be stored in the next storage pool on the server.
    
    Tivoli Storage Manager Versions Affected:
    Tivoli Storage Manager Server documentation for versions
    5.5, 6.1, 6.2, 6.3 and 7.1 on all platforms
    
    Initial Impact:
    low
    
    Additional Keywords:
    TSM, zz61, zz62, zz63, zz71, maxsize compressed
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All Tivoli Storage Manager server users.     *
    ****************************************************************
    * PROBLEM DESCRIPTION: See error description.                  *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    *
    

Problem conclusion

  • The Tivoli Storage Manager Information Center will be updated
    to include more information about the MAXSIZE parameter of the
    DEFINE STGPOOL and UPDATE STGPOOL commands. This information
    will be added to the Administrator's Reference in "DEFINE
    STGPOOL" and "UPDATE STGPOOL" sections.
    
    The section will provide the following information for the
    MAXSIZE parameter:
    "The client estimates the size of files that will be sent to
    the server. The client estimate is used rather than the actual
    amount of data that is sent to the server. Client options,
    such as deduplication, compression, and encryption, can cause
    the actual amount of data that is sent to the server to be
    larger or smaller than the size estimate.  For example, the
    compression of a  file may be smaller in size than the
    estimate, thus sending less data than the estimate.
    Furthermore, a binary file may be larger in size after the
    compression processing, thus sending more data than the
    estimate."
    
    Affected platforms: AIX, HP-UX, Solaris, Linux, and Windows.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IC98542

  • Reported component name

    TSM SERVER

  • Reported component ID

    5698ISMSV

  • Reported release

    63L

  • Status

    CLOSED DOC

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2014-01-02

  • Closed date

    2014-01-20

  • Last modified date

    2014-01-20

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

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

Fix information

Applicable component levels



Document information

More support for: Tivoli Storage Manager

Software version: 63L

Reference #: IC98542

Modified date: 20 January 2014