Comparison of NIS and NIS+
To help you understand the differences between NIS and NIS+, Table 22 compares the features of the two programs.
Table 22. Comparison of NIS and NIS+ Features| Capability
| NIS Features
| NIS+ Features
|
|---|
| Namespace
| Flat.
| Hierarchical.
|
| Database
| Centralized for each independent network domain.
| Partitioned into directories to support each network subset or autonomous domain.
|
| Data storage
| Multiple bicolumn maps with key-value pairs.
| Multicolumn tables with multiple searchable columns.
|
| Replication
| Minimum of one replica server per IP subnetwork.
| Each replica server can serve clients on multiple IP subnets.
|
| Update privileges
| Requires superuser privileges on the master server.
| Performed remotely by authorized administrators; no superuser privileges required.
|
| Update propagation
| Initiated by administrator; whole maps transferred.
| Automatic and high-performance updating, using only updated information.
|
| Authorization
| Anyone can read all of the information stored in the NIS database.
| Access control to individual elements within the NIS+ directories, tables, columns, and entries.
|
|
Resource access across domains
| Not supported.
| Permitted for authorized users.
|
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