9.6 monchange (changes settings and operations while HA Monitor and servers are running)

Format

Changing an HA Monitor setting:

monchange -m operand-name value

Changing the operations of monitoring the system disk:

monchange –m operand-name {-stop_patrol | -start_patrol}

Setting and releasing the online serverless mode:

monchange –m operand-name {-use | -nouse}

Changing a server setting:

monchange -s server-alias-name operand-name value

Changing the operations of monitoring servers:

monchange –s server-alias-name operand-name {-stop_patrol | -start_patrol}

Changing a monitor-mode program setting:

monchange -p monitor-mode-program-alias-name operand-name value

Users who can execute the command

Superuser

Description

While HA Monitor and servers are running, you can change the following settings and operations:

HA Monitor setting:

You can change the host failure monitoring time specified in the patrol operand in the HA Monitor environment settings.

Operation of system disk monitoring:

You can temporarily stop or restart the monitoring of the system disk specified in the disk_ptrl operand in the HA Monitor environment settings. When the monitoring of the system disk is restarted, the monitoring definition file for the system disk that currently exists takes effect.

Setting and releasing the online serverless mode:

You can set or release the online serverless mode.

To set the online serverless mode, all servers must be terminated. If setting of the online serverless mode is successful, the KAMN545-I message is output. If the setting fails, the KAMN547-E message is output.

To release the online serverless mode, all servers must be placed in one of the following statuses:

• The server has terminated.

• The active server has finished startup or is ready for hot-standby switchover (server status: ONL).

• The standby server is ready for hot-standby switchover (server status: SBY).

If releasing of the online serverless mode is successful, the KAMN546-I message is output. If the releasing fails, the KAMN548-E message is output.

Changing a server setting:

You can change the server failure monitoring time specified in the patrol operand in the server environment definition.

Operation of server monitoring:

You can temporarily stop or restart the monitoring of the monitor-mode server specified in the ptrlcmd_ex or sby_ptrlcmd_ex operand in the server environment definition. You can also temporarily stop or restart the monitoring of the disks for business use on the server specified in the disk_ptrl operand in the server environment definition. When the monitoring of disks for business use on the server is restarted, the monitoring definition file for the disk for business use that currently exists takes effect.

Changing a monitor-mode program setting:

You can change the program slowdown monitoring interval specified in the patrol operand in the monitor-mode program environment definition.

Options

Changing the HA Monitor setting:

• -m

  Specifies that the HA Monitor setting is to be changed.

• operand-name

  Specifies patrol as the name of the operand whose HA Monitor setting to be changed.

• value

  Specifies a new value for the patrol operand. For details about the patrol operand value, see 8.3.1 HA Monitor environment settings (sysdef).

Changing the method of monitoring the system disk:

• -m

  Specify this option when changing the method of monitoring the system disk.

• operand-name

  Specify disk_ptrl as the name of the operand for the monitoring of the system disk.

• value

  To temporarily stop the monitoring, specify -stop_patrol. To restart the monitoring that is temporarily stopped, specify -start_patrol.

Setting and releasing the online serverless mode:

• -m

  Specify this option when setting or releasing the online serverless mode.

• operand-name

  Specifies onlless_mode as the name of the operand setting or releasing the online serverless mode.

• value

  Specify -use to set the online serverless mode. Specify -nouse to release the online serverless mode.

Changing a server setting:

• -s

  Specifies that the server setting is to be changed.

• server-alias-name

  Specifies the server alias name of the server whose setting is to be changed.

• operand-name

  Specifies patrol as the name of the operand whose server setting is to be changed.

• value

  Specifies a new value for the patrol operand. For details about the patrol operand value, see 8.4.1 Server environment definition (servers).

Changing the method of server monitoring:

• -s

  Specify this option when changing the method of server monitoring.

• server-alias-name

  Specifies the server alias name of the server for which you want to change the method of monitoring.

• operand-name

  The value to be specified differs depending on the monitoring target for which you want to change the method of monitoring. Specify one of the following values:

  If the monitoring target is the active server, specify ptrlcmd_ex.

  If the monitoring target is the standby server, specify sby_ptrlcmd_ex.

• value

  To temporarily stop the monitoring, specify -stop_patrol. To restart the monitoring that is temporarily stopped, specify -start_patrol.

Changing a monitor-mode program setting:

• -p

  Specifies that a setting for a monitor-mode program that uses the program management function is to be changed.

• monitor-mode-program-alias-name

  Specifies the alias name of the monitor-mode program whose setting is to be changed.

• operand-name

  Specifies patrol as the name of the operand whose value is to be changed for the monitor-mode program.

• value

  Specifies a new value for the patrol operand. For details about the patrol operand value, see 8.5.1 Monitor-mode program environment definition (programs).

Return codes

Notes

• The monchange command does not change the contents of the definition file. When you have used this command to change a setting and then restart HA Monitor, the setting reverts to its initial value. If necessary, change the environment setting and then restart HA Monitor.

• In the following cases, temporary monitoring stoppage executed by the monchange command is canceled and the monitoring is restarted:

  • When the host or server is restarted

  • When hot-standby switchover is performed

• The following notes apply to changing the HA Monitor setting:

  • Before you execute the command, make sure that all hosts on which the setting is to be changed are connected.

  • You change the host failure monitoring time for all connected hosts when you execute the monchange command on any one of the hosts.

  • Do not execute this command from multiple hosts at the same time.

  • If you have restarted a host after changing its host failure monitoring time or if the monitoring time no longer matches between hosts due to an error such as a communication error, re-execute the monchange command to synchronize the host failure monitoring time between hosts.

  • If you collect host monitoring history, specify a value that is greater than the current value of the host's monitoring history time. If the specified value is smaller than the host's monitoring history time, monitoring history will not be collected.

• The following notes apply to changing the method of monitoring the system disk:

  • The monchange command changes the method of monitoring the system disk on only the host on which the command is executed.

  • After executing the monchange command, to check whether the method of monitoring the system disk has changed, execute monshow -o -m.

  • If use is specified for the notswitch_notify operand in the HA Monitor environment settings, the KAMN540-W message is output each time one hour elapses in the status in which the monitoring is temporarily stopped.

• The following notes apply when setting or releasing the online serverless mode:

  • The monchange command sets or releases the online serverless mode only for the host on which the command is executed.

  • After executing the monchange command, to check whether the online serverless mode was set or released, execute monshow -j.

  • When HA Monitor stops in the online serverless mode, the online serverless mode is released. If necessary, set the online serverless mode again after restarting HA Monitor.

  • If you are using the multi-standby function (use is specified in the multistandby operand), you cannot set the online serverless mode. In this case, the KAMN547-E message is output.

• The following notes apply to changing the server setting:

  • The monchange command changes the server failure monitoring time only for the host on which the command is executed. You must execute the command separately on the host where the standby server is running.

  • If you collect server monitoring history, specify a value that is greater than the current value of the server's monitoring history time. If the specified value is smaller than the server's monitoring history time, monitoring history will not be collected.

• The following notes apply to changing the operation of server monitoring:

  • The monchange command changes the operation of monitoring the server that is running on only the host on which the command is executed.

  • After executing the monchange command, to check whether the operation of server monitoring has changed, execute monshow -o -s.

  • If use is specified for the notswitch_notify operand in the HA Monitor environment settings, the KAMN521-W message is output each time one hour elapses in the status in which the monitoring is temporarily stopped.

  • If the monitoring is temporarily stopped, the monitoring command cannot detect a failure. If necessary, restart the monitoring.

  • Even when the monitoring is temporarily stopped, if hot-standby switchover is possible, you can use one of the following methods to perform hot-standby switchover:

    • Hot-standby switchover by using the server hot-standby switchover command (monswap command)

    • Grouped-system switchover

    • Hot-standby switchover caused by a host failure

  • To prevent hot-standby switchover from occurring when the monitoring is temporarily stopped, terminate the standby server.

• The following notes apply to changing the settings for a monitor-mode program:

  • The monchange command changes the program slowdown monitoring interval only on the host on which the command is executed. You must also execute the command on the host where the standby server runs.

  • In a multi-process configuration where multiple processes run under the same program alias name, this command changes the program slowdown monitoring interval for all the processes.

Examples

Changing the HA Monitor setting:

monchange -m patrol 60

Changing the operations of monitoring the system disk:

To temporarily stop the monitoring of the system disk, execute the following command:

monchange –m disk_ptrl -stop_patrol

To restart the monitoring of the system disk, execute the following command:

monchange –m disk_ptrl -start_patrol

Setting and releasing the online serverless mode:

To set the online serverless mode, execute the following command:

monchange -m onlless_mode -use

To release the online serverless mode, execute the following command:

monchange -m onlless_mode -nouse

Changing a server setting:

monchange -s server1 patrol 5

Changing the operation of server monitoring:

To temporarily stop the monitoring on the active server, execute the following command:

monchange –s server1 ptrlcmd_ex -stop_patrol

To restart the monitoring on the active server, execute the following command:

monchange –s server1 ptrlcmd_ex -start_patrol

Changing a monitor-mode program setting:

monchange -p program1 patrol 600