Administering systems
Prev	Administration-Putting VCS to work	Next

---

Administering systems

To modify a system's attributes

• Type the following command:

  # hasys -modify modify_options

  Some attributes are internal to VCS and cannot be modified. For details on system attributes, see About the -modify option.

To display the value of a system's node ID as defined in the file
/etc/llttab

• Type the following command:

  # hasys -nodeid node_ID

To freeze a system (prevent groups from being brought online or switched on the system)

• Type the following command:

  # hasys -freeze [-persistent] [-evacuate] system

   

  -persistent	Enables the freeze to be "remembered" when the cluster is rebooted. Note that the cluster configuration must be in read/write mode and must be saved to disk (dumped) to enable the freeze to be remembered.
  -evacuate	Fails over the system's active service groups to another system in the cluster before the freeze is enabled.

To unfreeze a frozen system (reenable online and switch of service groups)

• Type the following command:

  # hasys -unfreeze [-persistent] system

To run a command on any system in a cluster

• Type the following command:

  # hacli -cmd command [-sys | -server system(s)]

  Issues a command to be executed on the specified system(s). VCS must be running on the systems.

  The use of the hacli command requires setting HacliUserLevel to at least COMMANDROOT. By default, the HacliUserLevel setting is NONE.

  If the users do not want the root user on system A to enjoy root privileges on another system B, HacliUserLevel should remain set to NONE (the default) on system B.

  You can specify multiple systems separated by a single space as arguments to the option -sys. If no system is specified, command runs on all systems in cluster with VCS in a RUNNING state. The command argument must be entered within double quotes if command includes any delimiters oroptions.