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Thread: Dedup reporting

  1. #1
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    Default Dedup reporting

    Hi,
    We have a TSM 6.12 set up and I am trying to understand the Dedup reporting.
    I *THOUGHT* after much reading that:-
    Logical_mb = actual ammount of data in the fiespace. i.e. how much space is being used in the stgpool by the client data.

    Reporting_mb = the ammount of space the data would have taken in the stgpool if you had not used dedup.

    Hence I thought that reporting_MB would always be >= logical_mb

    But it isnt! - see below.
    What is the reason for this, it looks like dedup is actually taking up MORE space than an undeduped storage pool for these clients ?


    tsm: RDG-DP3TSM>select * from occupancy where logical_mb>reporting_mb order by logical_mb desc
    NODE_NAME: 195520
    TYPE: Bkup
    FILESPACE_NAME: \\c26-server-vmho\e$
    STGPOOL_NAME: GENERAL_ONSITE
    NUM_FILES: 1606
    PHYSICAL_MB: 0.00
    LOGICAL_MB: 7005268.41
    REPORTING_MB: 3221424.46
    FILESPACE_ID: 4
    NODE_NAME: 349219
    TYPE: Bkup
    FILESPACE_NAME: \\sasp-04\h$
    STGPOOL_NAME: GENERAL_ONSITE
    NUM_FILES: 1497
    PHYSICAL_MB: 0.00
    LOGICAL_MB: 430126.61
    REPORTING_MB: 214392.86
    FILESPACE_ID: 8

  2. #2
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    Default

    I think you should contact IBM support about this. From what I've read, reporting_mb should always be larger or the same as logical_mb.

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