Nonstop Database, HiRDB Version 9 Description
A HiRDB single server configuration consists of one unit (one single server). The following figure shows the configuration of a HiRDB single server configuration.
Figure 1-3 HiRDB single server configuration
A HiRDB single server configuration is composed of the following server:
The unit controls and monitors execution of the server. The unit can be compared conceptually to a container in which the server is stored.
The single server is the server that manages a database (tables and indexes) and the data dictionaries (dictionary tables) that contain information about the database.
If the server machine on which a HiRDB single server configuration is implemented does not have I/O devices, such as CMT or magnetic tape drive, a server machine equipped with an I/O device can be used as a utility special unit. For example, when multiple HiRDB single server configurations are used and there is only a limited number of server machines equipped with I/O devices, a utility special unit can be set up. The following figure shows an example of a HiRDB single server configuration in which a utility special unit is set up.
Figure 1-4 Example of a HiRDB single server configuration (with a utility special unit)
All Rights Reserved. Copyright (C) 2015, Hitachi, Ltd.