Static Groups. A static group is an entry that contains an explicit list of
member or uniquemember attributes, depending on its particular structural object class.
Static groups are ideal for relatively small, infrequently changing elements. Once the
membership list grows, static groups become more difficult to manage as any change in a
member base DN must also be changed in the group. Static groups use one of three
structural object classes:
The Directory Server also supports nested groups, in which a parent group entry contains child attributes whose DNs reference another group. Nested groups are a flexible means to organize entries that provide inherited group membership and privileges. To maintain good performance throughput, a group cache is enabled by default. The cache supports static group nesting that includes other static, virtual static, and dynamic groups.
- Dynamic Groups. A dynamic group has its membership list determined by search criteria using a LDAP URL. Dynamic groups solve the scalability issues encountered for static groups as searches are efficient, constant-time operations. However, if searches range over a very large set of data, performance could be affected.
- Virtual Static Groups. A virtual static group is a combination of both static and dynamic groups, in which each member in a group is a virtual attribute that is dynamically generated when invoked. Virtual static groups solve the scalability issues for clients that can only support static groups and are best used when the application targets a search operation for a specific member. Virtual static groups are not good for applications that need to retrieve the entire membership list as the process for constructing the entire membership list can be expensive.
The Directory Server provides the following types of groups: