Definitions

  1. Real Object: Basic set of information pertaining to one entry

  2. Cluster: defines the size of a set of contiguous blocks (of fixed size) in the logical device for Indexes AVIDX (see chapter 5). The minimum size of such a cluster is not directly configurable and depends on the DirX Directory version. This size is of 32 MB for versions up to DirX Directory Extranet Edition V2.0B respectively and
    may be reduced to 8 MB for subsequent versions.

  3. Additionally for DirX Directory, the maximum size of a cluster is 128 MB.
    The purpose of clusters is to force a certain locality of related data.

  4. Density of Attribute Values in a DIT: In a directory tree, there are attributes where the value can be the same for many entries and other attributes where the value can be different for any entry. For instance consider these 2 extremes: a Boolean attribute will have only two values and an attribute like the Common Name (which is often quite unique defined) will tend to have as much values as the number of entries in the database (assuming a single valued attribute). If N is the member of entries, the possible number of existing values for single valued attributes will vary between 2 and N. For all attributes, there will be an average value between 2 and N. The density D is this average value, expressed as a percentage of N.