16.3.4 Cluster settings

(a) Monitoring targets

• Management Server

• Administration Agent

• Logical server ^#

#

The node is switched when the logical server status becomes "abnormal termination" (the automatic restart frequency is exceeded or when 0 is specified as the automatic restart frequency and a failure is detected). Specify the following key in mserver.properties (Management Server environment setup file):

com.cosminexus.mngsvr.logical_server_abnormal_stop.exit = true

If automatic restart is specified for Management Server, node switching is not executed during this time. For executing the node switching during this time, do not specify automatic restart for Management Server.

In a configuration in which two or more executing nodes exist, do not specify true for the com.cosminexus.mngsvr.logical_server_abnormal_stop.exit key. If you do so, multiple systems of these executing nodes might start on the standby node.

(b) Monitoring methods

This subsection describes the monitoring methods to be implemented in node switching for the host management model.

Use one of the following methods according to the operation or environment used:

• Process monitoring

  This method does not place too much load on the monitoring process.

• Process monitoring and health check

  The monitoring accuracy is higher than the method of monitoring only the processes, but this method places some load on the monitoring process.

To monitor a logical server, see the notes described in (a) Monitoring targets.

• Process monitoring

  This method monitors the existence of Management Server processes. The following table describes the names of the monitored processes:

  Table 16‒3: Monitored processes

  Monitoring target	Process name
  	In Windows	In UNIX
  Management Server	mngsvr.exe	cjstartsv#1, #2
  Administration Agent	adminagent.exe	adminagent
  Logical server	mngsvr.exe	cjstartsv#1

  #1

  The cjstartsv process has the same name as the process name of the J2EE server. You identify the process of Management Server by the server name.

  #2

  The command line name of Management Server begins with the following character string:

  /opt/Cosminexus/CC/server/bin/cjstartsv cosmi_m

  cosmi_m is the default server name. If Management Server is set up with a server name other than cosmi_m, change the server name.

• Health check

  This method monitors the existence of Management Server processes and whether the existing processes are running. Confirm by executing the following commands in Management Server:

  • When monitoring Management Server and logical server

    mngsvrutil command

  • When monitoring the Administration Agent

    adminagentcheck command