14.6.3 Remote Power Management Structure
14.6.3 Remote Power Management Structure
Remote power management for the SPARC M12/M10 is controlled per the remote power management group.
Of the host nodes in a group, the host nodes with the remote power management function enabled are targeted for remote power management. The power supply status of a remote power management group is determined depending on the host node status in the group.
Of the host nodes in a group, the host nodes with the remote power management function enabled are targeted for remote power management. The power supply status of a remote power management group is determined depending on the host node status in the group.
- On status
When the status of the power supply of any one of the host nodes in the remote power management group is on - Off status
When the status of the power supplies of all host nodes in the remote power management group is off
This section describes remote power-on and power-off management structures based on the following settings.
Setting Item | Host Node#0 | Host Node#1 | Host Node#2 | I/O Node#0 | I/O Node#1 |
---|---|---|---|---|---|
Remote management setting | Disable | Enable | Enable | Setting disabled | Setting disabled |
Master node | Yes | No | Yes | Setting disabled | Setting disabled |
Mechanism of Interlocking When Powering On
If any of the host nodes in a remote power management group is powered on, then all of the host nodes, subnodes, and I/O nodes in the group are powered on. Host nodes are powered on, followed by I/O nodes.
Note - You can set a time for host nodes to wait until I/O node devices are accessible. Use the setpowerupdelay command of the XSCF firmware to make the setting. For details, see "4.2.1 Setting/Checking the Warmup Time." If you do not set the wait time, the system may fail to start when a host node attempts to access an I/O node device that is inaccessible. In addition, if I/O nodes are switched or the setting is changed, the time to access the devices changes. So, the devices may not be accessed when a host node attempts to access one. If you have switched I/O nodes or changed the setting, use the setpowerupdelay command to set a new wait time. |
Remote Power-off Management Structure
All the host nodes in a remote power management group are powered off, followed by all the I/O nodes in the group.
Remote Power Management by Wake on LAN
Generally, the target nodes of the remote power management function of the SPARC M12/M10 are the hosts and I/O devices on which a controller is mounted. The controller allows IPMI communication even while the power of the hosts and I/O devices is turned off.
When all of the following conditions are satisfied, those devices on which such a controller is not mounted can also remotely manage power using the remote power management function of the SPARC M12/M10.
When all of the following conditions are satisfied, those devices on which such a controller is not mounted can also remotely manage power using the remote power management function of the SPARC M12/M10.
- Wake on LAN is supported.
Power-on is performed with Wake on LAN.
Power-on is performed with Wake on LAN.
- IPMI communication can be performed.
After power-on using Wake on LAN, IPMI communication through the LAN is used for performing power-off and obtaining the power state.
After power-on using Wake on LAN, IPMI communication through the LAN is used for performing power-off and obtaining the power state.
- They are connected to the network on the same subnet as XSCF-LAN#0 of the master host node or XSCF-LAN#0 and XSCF-LAN#1 of the master host node.
Note - A host node where Wake on LAN is set cannot become a master node. |
Note - Wake on LAN cannot be set for the SPARC M12/M10 chassis. Therefore, Wake on LAN cannot be used to power on the SPARC M12/M10 chassis. |
Note - The Wake on LAN setting varies depending on the node. See the manuals for each node. |
Interlocking at the Failure Recovery Time
If a node in a remote power management group cannot communicate when recovered from a failure or other problem, operation is as follows.
- In the case of an I/O node failure
If the power supply status of a remote power management group is on, the master host node issues an instruction to power on. - In the case of host node failure
Even if the power supply status of a remote power management group is on, the master host node does not issue an instruction to power on.
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