ETERNUS SF Disk Space Monitor User's Guide - Microsoft(R) Windows Server(TM) 2003/Solaris(TM) Operating System/Linux - 13.0

1.2 Configuration Models

This section explains how ETERNUS SF Disk Space Monitor products can be combined.

1.2.1 Basic model comprising a Manager and Agents 

This is the most basic model. It consists of a Manager and a number of Agents.

• Each Agent collects performance information from their local server. The information that is collected is then managed collectively on the Manager.
• In the above diagram, the operation management client and the Manager are located on separate machines. However, if the Manager is installed on a Windows machine, it can be installed on the same machine as the operation management client.

  

  When the Manager is operating in a cluster system, the Manager and the operation management client cannot be installed on the same machine.

• In addition to using the operation management client, the system administrator can conduct operation management from a Web browser located on a separate machine. In this case, the system administrator connects to the operation management client via HTTP as shown in the diagram above.

1.2.2 Manager redundancy model 

In this model, two Managers are used to manage the same system. This means that if one node fails, it is possible to continue management operations by switching to the other node.

Even if one Manager cannot be used due to a network fault, etc., this system permits the Manager connected to a functioning network to take over management operations. This differs from the redundancy that is achieved using a cluster system.

• The functions of the Manager in a redundant configuration are the same as those of a normal Manager (i.e., a Manager that is not in a redundant configuration).
• Each Manager is connected to a different operation management client.

1.2.3 Cluster system operation model 

The management mechanism provided by a Manager can be operated in a cluster system. This improves the availability of management operations because if a problem develops on one node, operations can continue on the remaining normal node.

In a cluster system, Agents operate on the active and standby nodes respectively.