DBAM Tools: Overview on Configuration Options

  1. dbamconfig

    The dbamconfig tool (see [4]) allows to configure profiles defining how these data are located on the disc and how much disc space is allocated to each data type.

    For the default profile, a directory data device uses only one raw device and contains 3 logical devices

    • The first logical device contains GENERAL | BITSTR | PSEUDO | TREE and gets 20% of the raw device space

    • The second logical device contains REAL and gets 40% of the raw device space

    • The third logical device contains AVIDX and gets 40% of the raw device space

  2. dbamboot

    The dbamboot tool (see [5])

    • initializes/resets the database

    • defines which DBAM profile will be used

    • defines the fixed blocked size for REAL data. The value can be 1KB (default), 4KB, 16 KB or 64KB.

    • defines the maximum number of attributes that can be indexed

    • (default is 20). With this number and a check of the available disc space for AVIDX, the system will compute the optimal cluster size for this data type. The minimum size of a cluster is 8 MB, the maximum size is 128 MB for DirX Directory.

    • based on the available disc space, dbamboot displays a raw information telling how many entries can be created, how many attribute types can be indexed, how many attribute index entries can be created, which AVIDX cluster size was selected, and how many index cluster can be used. (The number of entries is determined upon the size for the REAL logical device and the chosen block size. The AVIDX size and the number of indexed attribute types will determine the used cluster size. If instead the logical device size is insufficient and even choosing the minimal cluster size, it is not possible to satisfy the administrator’s request, then a warning is displayed telling the maximal number of attributes affordable.)