| Oracle Integrated Lights Out Manager (ILOM) 3.0 Concepts Guide |    
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| C H A P T E R 6 |
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Power Monitoring and Management of Hardware Interfaces |
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Identify Power Monitoring and Management feature updates per ILOM firmware point release |
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Learn about ILOM’s real-time power monitoring and management features |
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Oracle Integrated Lights Out Manager (ILOM) 3.0 CLI Procedures Guide (820-6412) |
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Oracle Integrated Lights Out Manager (ILOM) 3.0 Web Interface Procedures Guide (820-6411) |
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Oracle Integrated Lights Out Manager (ILOM) 3.0 Management Protocols Reference (820-6413) |
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The ILOM 3.0 Documentation Collection is available at: http://docs.sun.com/app/docs/prod/int.lights.mgr30#hic |
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TABLE 6-1 identifies the common power management feature enhancements and documentation updates made since ILOM 3.0.
TABLE 6-2 identifies the initial power monitoring terminology and definitions as of ILOM 3.0.3.
For information about how to view the power management metrics in ILOM using the CLI or web interface, see the section about Monitoring the Power Consumption Interfaces in one of the following guides:
For details, about using ILOM’s real-time power monitoring and management features see these topics:
As of ILOM 3.0, you can view the server SP and CMM power consumption metrics using the ILOM CLI or web interface.
Since ILOM 3.0, web enhancements for the Power Consumption metrics have been made in ILOM 3.0.4, 3.0.8, and 3.0.10. The CLI power consumption metrics targets and properties have not changed since ILOM 3.0.
For information about how to access the power consumption metrics in ILOM, as well as updates made to the power consumption web interface since ILOM 3.0, see the following topics:
As of ILOM 3.0, you can control the power policy and view the power consumption metrics for a server SP or a CMM from the Power Management tab in the web interface.
The power consumption metrics (shown in FIGURE 6-1) for Actual Power, Permitted Power and Available Power are defined in Power Monitoring Terminology as of ILOM 3.0.3. For information describing the use of the Power Policy property, see Power Policy Settings for Managing Server Power Usage.
FIGURE 6-1 Power Management Web Interface Page as of ILOM 3.0.
TABLE 6-3 identifies the server SP and CMM power consumption metric properties available from the ILOM CLI as of ILOM 3.0.
As of ILOM 3.0.4, the server SP and CMM power consumption metrics in the web interface have been moved to the Power Management --> Consumption page.
FIGURE 6-2 Power Consumption Page as of ILOM 3.0.4
In this 3.0.4 web version of the Power Consumption page, the following changes were made for the Server SP and CMM:
As of ILOM 3.0.8, some of the power consumption properties on the web interface for the server SP have changed. For more information about these property changes, see TABLE 6-4. For an updated view of the Power Consumption page for the server SP as of ILOM 3.0.8 see FIGURE 6-3
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A new read-only property for Target Limit is available on the Power Management --> Consumption tab as of ILOM 3.0.8. The Target Limit (shown in FIGURE 6-3) property represents the power consumption limit value that was configured for the server. Note - The configuration options for the Target Limit property appear on the Power Management --> Limit tab. For more details about the Target Limit configuration options, see Power Management --> Budget Tab Renamed to Limit Tab as of ILOM 3.0.8. |
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The Permitted Power property on the Power Management --> Consumption tab in ILOM 3.0.4 (shown in FIGURE 6-2) was renamed to Peak Permitted in ILOM 3.0.8. The Peak Permitted read-only property (shown in FIGURE 6-3) represents the maximum power the system can consume. Note - For servers, the Peak Permitted value in ILOM is derived from the System Allocated power and the Target Limit. For more details, see Advanced Server Power Budget Features as of ILOM 3.0.6. |
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The read-only property for Allocated Power (shown in FIGURE 6-2) was removed from the Power Management --> Consumption tab as of ILOM 3.0.8 (shown in FIGURE 6-3). Note - In ILOM 3.0.8, you can view Allocated Power values for the system and for each component on the Power Allocation Plan page. For more details, see Power Management --> Distribution Tab Renamed to Allocation Tab as of ILOM 3.0.8 (Server SP). |
FIGURE 6-3 Updated Power Management --> Consumption Tab - ILOM SP 3.0.8
As of ILOM 3.0.10, some of the power consumption properties on the web interface for the CMM have changed. For more information about these property changes, see TABLE 6-5. For an updated view of the Power Consumption page for the server SP as of ILOM 3.0.8 see FIGURE 6-4.
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The Permitted Power property on the CMM Power Management --> Consumption tab was renamed to Peak Permitted in ILOM 3.0.10. The Peak Permitted read-only property (shown in FIGURE 6-4) represents the maximum power the system is permitted to use. |
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The read-only property for Available Power (previously available in ILOM 3.0.4) was removed from the CMM Power Management --> Consumption tab as of ILOM 3.0.10 (shown in FIGURE 6-4). The read-only property for Available Power was renamed to Grantable Power in ILOM 3.0.10 and moved to the Power Summary table on the Allocation tab. For more details, see Power Management --> Distribution Tab Renamed to Allocation Tab as of ILOM 3.0.10 (CMM). |
FIGURE 6-4 Updated Power Management --> Consumption Tab - ILOM CMM 3.0.10
To help manage the power usage of your system, ILOM supports the following Power policies:
As of ILOM 3.0, two Power Policy settings (shown in FIGURE 6-1) are available from the ILOM CLI and web interface to help you manage the power usage on your system.
TABLE 6-6 defines the two Policy settings you can choose to configure from the ILOM CLI and web interface:
For more details about how to access and configure the power policy settings in ILOM, see the section about Monitoring Power Consumption in one of the following guides:
As of ILOM 3.0.4, the Power Policy settings in the ILOM interface have been changed as follows:
FIGURE 6-5 Policy on Limit Tab for Some SPARC Servers as of ILOM 3.04.
As of ILOM 3.0.8, advanced policy settings (shown in FIGURE 6-6) for power capping where added to the ILOM web interface for x86 servers and some SPARC servers.
For detailed description of the power capping properties, see TABLE 6-7.
| Note - The Advanced Power Capping Policy settings replaced the Time Limit properties originally available from the Power Management -> Budget tab in ILOM 3.0.6. |
FIGURE 6-6 Advanced Power Policy Appear on Limit Tab as of ILOM 3.0.8
For more information about configuring power limit properties using the ILOM web interface, see the section about Configure Server Power Limit Properties in the Oracle Integrated Lights Out Manager (ILOM) 3.0 Web Interface Procedures Guide.
As of ILOM 3.0.3, a rolling average of power consumption in 15, 30, and 60 second intervals is available for the server SP and CMM. Specifically, these rolling averages displayed by the ILOM CLI or web interface are obtained by leveraging ILOM’s sensor history capability.
For more details about viewing the power usage and history information for a hardware device in ILOM, see the following topics:
The Power Consumption History metrics for the server SP and CMM are available from the ILOM CLI and web interface.
As of ILOM 3.0.3, you can access power metrics for system Power Usage Averages and History in the ILOM web interface from the System Monitoring -> Power Management page (click History link).
FIGURE 6-7 Web Power Usage and History Metrics for CMM as of ILOM 3.0.3
You can obtain a sample data set of the power consumed by the system for a specific duration by clicking the Sample Set link on the History page.
EXAMPLE 6-1 Data Set Sample of Power Consumed by System
As of ILOM 3.0.4, the metrics for the power usage statistics and history was removed from the Power Management page (shown in FIGURE 6-7) to a separate Power Management --> History tab (shown in FIGURE 6-8).
FIGURE 6-8 Web Power Statistics and Power History for Server as of ILOM 3.0.4
As of ILOM 3.0.14, the Statistics table appearing on the Power Management --> History tab in ILOM 3.0.4 (shown in FIGURE 6-8) was moved to a separate Statistic tab (shown in FIGURE 6-9 and FIGURE 6-10) in the ILOM web interface.
FIGURE 6-9 Power Statistics Tab for Server as of ILOM 3.0.14
FIGURE 6-10 Power Statistics Tab for CMM as of ILOM 3.0.14
FIGURE 6-11 Power History Tab for Server as of ILOM 3.0.14
TABLE 6-8 identifies the power consumption history properties available from the ILOM CLI as of ILOM 3.0.3.
As of ILOM 3.0.4, two new Notification Threshold settings are available in the CLI and web interface (as shown in FIGURE 6-2). These Notification Threshold settings enable you to generate up two power consumption notifications when the specified power consumption value (in watts) exceeds the threshold. Each time the power consumption value exceeds the specified threshold (in watts) an ILOM event is generated and logged in the ILOM event log.
The power consumption notification generated by ILOM is dependent on the whether email alerts have been configured or if SNMP traps have been enabled. For more information, about email alerts and SNMP traps, see System Monitoring and Alert Management.
For more information about configuring the power consumption notification thresholds, see the section about View and Configure Notification Thresholds in one of the following guides:
The Component Allocation Power Distribution feature in ILOM enables you to monitor, in real-time, the amount of power that is allocated to server components and, if applicable, CMM components.
Topics described in this section:
TABLE 6-9 identifies the components that are allocated power in ILOM by your Oracle Sun server. For each component listed in TABLE 6-9, ILOM provides an allocated server power value in wattage that represents the sum of the maximum power consumed by either a single server component (such as a memory module), a category of server components (all memory modules), or all server power-consuming components.
| * These I/O modules apply only to Sun Blade server modules.** These devices for server modules are allocated power by the CMM. See TABLE 6-10 for details. | |||
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You can monitor the server power allocated components from the Power Management --> Distribution page in the ILOM SP web interface or from the SP/powermgmt/powerconf CLI target in the ILOM SP CLI. An example of the Power Management --> Distribution page is shown FIGURE 6-12.
FIGURE 6-12 Power Management --> Distribution Tab - ILOM SP 3.0.6
For more details about how to view the server or CMM power allocation, see the sections about View Server Component Power Allocation or View CMM Component Power Allocation in the Oracle Integrated Lights Out Manager (ILOM) 3.0 Web Interface Procedures Guide.
Update: As of ILOM 3.0.8 the Distribution tab is replaced by the Allocation tab. For more details, see Power Management --> Distribution Tab Renamed to Allocation Tab as of ILOM 3.0.8 (Server SP) or Power Management --> Distribution Tab Renamed to Allocation Tab as of ILOM 3.0.10 (CMM).
TABLE 6-10 identifies the components that are allocated power in ILOM by the CMM in your Sun system chassis. For each component listed in TABLE 6-10, ILOM provides an allocated CMM power value in wattage that represents the sum of the maximum power consumed by either a single CMM component (a blade), a category of CMM components (all blades), or all CMM power-consuming components. It also provides a permitted CMM power value in wattage that represents the guaranteed maximum power the CMM component (or component category) can consume.
| Note - The Permitted Power value in ILOM is derived from the Power Supply Redundancy Policy and the Redundant Power available (for details see,Power Supply Redundancy for CMM Systems as of ILOM 3.0.6). The CMM continuously monitors and tracks all the Allocated Power to the system, as well as the Allocatable Power remaining and it ensures that the sum for these numbers (allocated and allocatable) never exceeds the chassis Permitted Power value. |
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All CMM power-consuming components (aggregate value for all powered entities listed) |
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| * The permitted power allocated to blade slots is user configurable. | |||
You can monitor the power allocated CMM components from the Power Management --> Distribution page in the ILOM CMM web interface or from the CMM/powermgmt/powerconf CLI target in the ILOM CMM CLI. For instructions, see the section about View CMM Component Power Allocation in one of the following guides.
In addition to monitoring the power allocation for each CMM power allocated component, you can modify the permitted (maximum) power the CMM allocates to blade slots within the chassis. For instructions, see the section about Configure Permitted Power for Blade Slots in one of the following guides:
When monitoring the server or CMM power allocated components, consider the following information:
For more information about which locations or components on your server or CMM chassis system are hot-pluggable, refer to the platform documentation shipped with your system.
The Distribution tab that was previously available for the server SP in ILOM 3.0.6 (shown in FIGURE 6-12) was renamed in ILOM 3.0.8 to the Allocation tab (shown in FIGURE 6-13).
The Allocation tab, in ILOM 3.0.8, provides all the same power requirement information previously available on the Distribution tab in ILOM 3.0.6 (shown in FIGURE 6-12). However, the Allocation tab uses two tables to separate the system power requirements from the component power requirements (shown in FIGURE 6-13)
FIGURE 6-13 Power Management --> Allocation Tab - ILOM SP 3.0.8
For instructions for viewing the server power allocations in ILOM, see the section about View Server Power Allocation Plan in the Oracle Integrated Lights Out Manager (ILOM) 3.0 Web Interface Procedures Guide.
The Distribution tab that was previously available for the CMM in ILOM 3.0.6 (shown in FIGURE 6-12) was renamed in ILOM 3.0.10 to the Allocation tab (shown in FIGURE 6-14).
The Allocation tab, in ILOM 3.0.10, provides all the same power requirement information previously available on the CMM Power Distribution tab in ILOM 3.0.6. However, the new CMM Allocation tab in ILOM 3.0.10 provides two additional tables that identify the System Power Specifications and the Blade Power Grants (as shown in FIGURE 6-14).
TABLE 6-11 defines the property changes made on the CMM Allocation Tab as of 3.0.10.
FIGURE 6-14 Power Management -> Allocation Tab - ILOM CMM 3.0.10
A summary of the CLI changes that were made in ILOM 3.0.10 to the CMM power configuration is provided in TABLE 6-12.
For instructions for using these latest CLI properties to view granted power or grant limit per blade, see the procedures about View Granted Power or Grant Limit in the Oracle Integrated Lights Out Manager (ILOM) 3.0 CLI Procedures Guide.
| Note - The Power Budget properties described in this section are replaced in the web interface with the Limit tab properties as of ILOM 3.08. For updated details, see. |
Some Oracle server platforms support a power budget. A power budget sets a limit on the system’s power consumption. The system applies power capping when power consumption exceeds the power limit and guarantees that the maximum power consumption will not exceed the system’s Permitted Power.
You can configure a power budget and then, at a later time, enable or disable the configuration properties that are set. After a power budget is enabled, the ILOM SP monitors the power consumption and applies power capping when needed. Power capping is achieved by limiting the maximum frequency at which the CPUs run. The ILOM SP coordinates this process with the operating system (OS) to ensure that the OS can continue applying its own power management policies within the set limit.
Power budget settings in ILOM are saved across all SP reboots and host power-off and power-on states. During an SP reboot, the applied power capping budget that is in effect will remain. After the SP completes the reboot process, power capping is then automatically adjusted, as needed, by the system.
ILOM’s ability to achieve a power budget depends on the workload running on the system. For example, if the workload is causing the system to operate near the maximum power consumption, ILOM will be unable to achieve a budget that is close to the minimum power consumption. If ILOM is unable to achieve the set Power Limit, it will automatically generate a violation notification.
Power Budget topics described in this section include:
For information about configuring Power Budget properties in the ILOM, see the section about Configure Server Power Budget Properties in one of the following guides:
The Power Budget feature in ILOM helps you to better plan and manage the power required for your data center. Typically the power allocated to a server is based on the nameplate power, as provided by the /SP/powermgmt allocated_power property.
The most effective way to use the Power Budget feature in ILOM is to:
1. Determine the workload that will operate on the Oracle server.
2. Set the Power Limit property in ILOM that is near (for example, at or slightly above) to the workload’s normal operating power consumption.
3. Use the Power Limit property value to help plan the amount of power that will need to be allocated in your data center for this system.
TABLE 6-13 identifies the server power budget properties that you can view or configure from the CLI or web interface in ILOM.
The advanced server power budget features in ILOM include properties for Time Limit and Violation Actions. These property settings (see TABLE 6-14) enable you to control the aggressiveness of power capping, and to configure a system action in response to a violated budget.
The server power budget is designed to ensure that power capping is not applied until the Power Limit is exceeded. The Time Limit property specifies the grace period for capping power to within the Power Limit, if exceeded. The system provides a default grace period that is set to achieve responsiveness at the least cost to the system performance. When the default grace period is enabled for the Time Limit property, anomalous spikes are ignored and power capping is applied only when power consumption remains above the Power Limit. If you specify a different grace period than the default grace period provided, the user-modified grace period could cause ILOM to increase or decrease the power cap severity in response to exceeding the Power Limit.
Server modules are allocated power by the chassis CMM, and must guarantee to not exceed this allocated amount. It might be necessary to reduce the server module's guaranteed maximum power to allow the server module to power on, or there might be some other administrative reason for requiring that the server power never exceeds a watts value. Setting the budget grace period to None instructs ILOM to permanently apply power capping to ensure that the Power Limit is never exceeded, at the cost of limited performance. If ILOM can guarantee the Power Limit with a grace period of None, it reduces the value of the Permitted Power property to reflect the new guaranteed maximum power. If the power limit or grace period is later increased, the Permitted Power value on a rackmount server is increased. However, the Permitted Power value for a Sun Blade server module will only increase if the chassis CMM is able to provide the server module with additional power.
TABLE 6-14 identifies the advanced server power budget property settings that you can view or configure from the ILOM CLI or web interface.
| Note - For best power capping performance, the default values are recommended for all advanced server power budget properties. |
An example of the web interface Power Management --> Budget properties is shown in FIGURE 6-15.
FIGURE 6-15 SP - Power Management Budget Tab - ILOM 3.0.6
For instructions about how to view or configure the server and advanced server power budget properties in ILOM, see the section about Configure Server Power Budget Properties in one of the following guides:
The Budget tab that was previously available for server SPs in ILOM 3.0.6 was renamed in ILOM 3.0.8 to the Limit tab (shown in FIGURE 6-16).
The Limit tab in ILOM 3.0.8 provides all the same SP power capping information that was previously available on the Budget tab. However, some of the previous power capping properties have been renamed on the Power Management --> Limit tab in ILOM 3.0.8. For more details about the property changes made to the Limit tab, see TABLE 6-15.
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The Activation State property on the Budget tab in ILOM 3.0.6 (shown in FIGURE 6-15) was renamed to Power Limiting on the Power Management --> Limit tab in ILOM 3.0.8. The Powering Limiting [] enable property (shown in FIGURE 6-16) when selected enables the power limit configuration. |
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The Status read-only property previously available on the Budget tab in ILOM 3.0.6 (shown in FIGURE 6-15) was replaced by a new Status Error Message on the Power Management --> Limit tab or Consumption tab in ILOM 3.0.8 (shown in FIGURE 6-16). The new Status Error Message only appears on your system when ILOM fails to achieve the power limit that was configured. |
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The Power Limit property on the Budget tab in ILOM 3.0.6 (shown in FIGURE 6-15) was renamed to Target Limit on the Power Management --> Limit tab in ILOM 3.0.8. The Target Limit property (shown in FIGURE 6-16) enables you to specify the a target limit value in watts or as a percentage. This value must be a range between the minimum and maximum system power. |
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The Time Limit property on the Budget tab in ILOM 3.0.6 (shown in FIGURE 6-15) was renamed to Policy on the Power Management --> Limit tab in ILOM 3.0.8. The Policy property (shown in FIGURE 6-16) enables you to specify the type of power capping to apply:
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An example of the new Power Management --> Limit tab properties that are available for server SPs as of ILOM version 3.0.8 is shown in FIGURE 6-16.
FIGURE 6-16 Power Management --> Limit Tab - ILOM SP 3.0.8
For information about configuring Power Limit properties in ILOM, see the section about Configure Server Power Limit Properties in the Oracle Integrated Lights Out Manager (ILOM) 3.0 Web Interface Procedures Guide.
From the ILOM CMM CLI or web interface you can view and configure the following power supply redundancy options:
To view or configure the CMM power supply redundancy options in the ILOM CLI or web interface, see the section about View or Configure CMM Power Supply Redundancy Properties in one of the following guides:
| Note - As of ILOM 3.0.10, the CMM Power Metrics tab was removed from the ILOM CLI and web interface. |
As of ILOM version 3.0.6, advanced power metrics are available in some Oracle systems from the ILOM CMM CLI or web interface. These metrics represent the maximum allocated power value for each blade slot. For empty slots or slots with I/O server modules, the value presented by ILOM represents the maximum power that an I/O server module could consume.
To determine whether your CMM system supports this ILOM 3.0.6 feature, refer to the platform ILOM Supplement for your server or CMM.
For Oracle systems supporting the CMM advanced power metrics, you can view the power metrics in the Power Management --> Metrics page of the ILOM web interface (FIGURE 6-17) or from the ILOM CLI under the target /CMM/powermgmt/advanced/BLn.
FIGURE 6-17 Sample Power Management Metrics Page
| Oracle Integrated Lights Out Manager (ILOM) 3.0 Concepts Guide | 820-6410-12 |
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