Managing Logical Domains Configurations

A Logical Domains configuration is a complete description of all the domains and their resource allocations within a single system. You can save and store configurations on the service processor (SP) for later use.

When you power up a system, the SP boots the selected configuration. By booting a configuration, the system runs the same set of domains, and uses the same virtualization and partitioning resource allocations that are specified in the configuration. The default configuration is the one that is most recently saved.

Starting with the Logical Domains 1.2 release, a copy of the current configuration is automatically saved on the control domain whenever the Logical Domains configuration is changed.

The autosave operation occurs immediately, even in the following situations:

• When the new configuration is not explicitly saved on the SP

• When the actual configuration change is not made until after the affected domain reboots

This autosave operation enables you to recover a configuration when the configurations that are saved on the SP are lost. This operation also enables you to recover a configuration when the current configuration was not explicitly saved to the SP when the system powercycled. In these circumstances, the Logical Domains Manager can restore that configuration on restart if it is newer than the configuration marked for the next boot.

Power management, FMA, ASR, and PRI update events do not cause an update to the autosave files.

You can automatically or manually restore autosave files to new or existing configurations. By default, when an autosave configuration is newer than the corresponding running configuration, a message is written to the LDoms log. Thus, you must use the ldm add-spconfig -r command to manually update an existing configuration or create a new one based on the autosave data.

When a delayed reconfiguration is pending, the configuration changes are immediately autosaved. As a result, if you run the ldm list-config -r command, the autosave configuration is shown as being newer than the current configuration.

For information about how to use the ldm *-spconfig commands to manage configurations and to manually recover autosave files, see the ldm(1M) man page.

For information about how to use an ALOM CMT Version 1.3 command to select a configuration to boot, see Using LDoms With ALOM CMT).

Modify the Autorecovery Policy

The autorecovery policy specifies how to handle the recovery of a configuration when one configuration that is automatically saved on the control domain is newer than the corresponding running configuration. The autorecovery policy is specified by setting the autorecovery_policy property of the ldmd SMF service. The autorecovery_policy property can have the following values:

• autorecovery_policy=1 – Logs warning messages when an autosave configuration is newer than the corresponding running configuration. These messages are logged in the ldmd SMF log file. The user must manually perform any configuration recovery. This is the default policy.

• autorecovery_policy=2 – Displays a notification message if an autosave configuration is newer than the corresponding running configuration. This notification message is printed in the output of any ldm command the first time an ldm command is issued after each restart of the Logical Domains Manager. The user must manually perform any configuration recovery.

• autorecovery_policy=3 – Automatically updates the configuration if an autosave configuration is newer than the corresponding running configuration. This action overwrites the SP configuration that will be used during the next powercycle. This configuration is updated with the newer configuration that is saved on the control domain. This action does not impact the currently running configuration. It only impacts the configuration that will be used during the next powercycle. A message is also logged, which states that a newer configuration has been saved on the SP and that it will be booted the next time the system is powercycled. These messages are logged in the ldmd SMF log file.

1. Become superuser on the control domain.

2. View the autorecovery_policy property value.

   # svccfg -s ldmd listprop ldmd/autorecovery_policy

3. Stop the ldmd service.

   # svcadm disable ldmd

4. Change the autorecovery_policy property value.

   # svccfg -s ldmd setprop ldmd/autorecovery_policy=value

   For example, to set the policy to perform autorecovery, set the property value to 3:

   # svccfg -s ldmd setprop ldmd/autorecovery_policy=3

5. Refresh and restart the ldmd service.

   # svcadm refresh ldmd # svcadm enable ldmd

Example 9–18 Modifying the Autorecovery Policy From Log to Autorecovery

The following example shows how to view the current value of the autorecovery_policy property and change it to a new value. The original value of this property is 1, which means that autosave changes are logged. The svcadm command is used to stop and restart the ldmd service, and the svccfg command is used to view and set the property value.

# svccfg -s ldmd listprop ldmd/autorecovery_policy
ldmd/autorecovery_policy integer 1
# svcadm disable ldmd
# svccfg -s ldmd setprop ldmd/autorecovery_policy=3
# svcadm refresh ldmd
# svcadm enable ldmd