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HP Capacity Advisor Version 4.0 User's Guide

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Symbols

90th percentile 

That utilization value in the selected time interval which 10% of the utilization values fall above, and 90% fall below or are equal to.


A

Accelerated Virtual Input/Output 

See AVIO.


activate 

When referring to a logical server, activate means to make a logical server definition available to be deployed into the computing environment. An active logical server is one that is currently operating within the computing environment. An inactive logical server is one that has been defined but is not currently operating within the computing environment.


activate cell 

The process of changing an inactive cell into an active cell. A cell is activated when it is integrated into an nPartition. A cell can also be activated through cell online activation.


activate I/O chassis 

The process of changing an inactive I/O chassis into an active I/O chassis. A chassis is activated when the cell to which it is attached is activated.


activated core 

A core that has been turned on by the HP Instant Capacity (iCAP) software or during installation. Cores are activated with the icapmodify command (or the vparmodify command in an HP-UX virtual partition) while HP-UX is running.


active cell 

A cell that is available for use by the software running on the nPartition. This implies that the cell's cores and memory (and I/O, if the cell is attached to an active I/O chassis) are all available for use by the OS. An active cell has the following characteristics:

  • It is present and populated.

  • It is powered on.

  • It is assigned to an nPartition.

  • It is released from boot-is-blocked.


active I/O chassis 

An I/O chassis with an initialized link to the system bus adapter (SBA). The SBA link must be initialized for software running on the nPartition to be able to use I/O cards installed in the I/O chassis.


active logical server 

A logical server that has been bound to both an HP SIM node and a VSE workload, and is bound to specific storage. Active logical servers can be in one of two states: powered on or powered off.

See also inactive logical server, logical server.


active nPartition 

An nPartition is active if at least one of the cells in the nPartition is active.

See also inactive nPartition.


add-on system 

A system that has been converted to an HP Instant Capacity (iCAP) system. This process is performed by an HP service representative.


advisory mode 

SRD advisory mode lets you see what requests HP Global Workload Manager (gWLM) would make for a compartment without changing its resource allocation.

See also managed mode, deploy.


agent 

A program with a well-defined task that runs in the background and that is used to capture information or do processing tasks.


allocation 

The amount of a resource that HP Global Workload Manager (gWLM) sets aside for a compartment after arbitrating resource requests from the policies for all the compartments.

In managed mode, gWLM makes an allocation available to a compartment. In advisory mode, gWLM reports what the allocation would be without changing resource allocations on a system.

See also entitlement.


annual projected growth rate 

The rate at which utilization of a resource is projected to change.


application 

A logically related set of processes active on a host system (a running application ) and/or a logically related set of files on a host system disk (an installed application).

HP Application Discovery recognizes applications based on standard package installation, templates that are shipped with the product, and templates that are defined by users.


application discovery 

The process of finding applications and gathering performance and location data about them for display and use.


association 
  1. In HP Systems Insight Manager (HP SIM), an association is created by discovery and identification of HP SIM system objects that are then associated with other objects. One type of association is containment. For example, clusters contain members, complexes contain nPartitions, and OS images contain resource partitions.

  2. In HP Global Workload Manager (gWLM), a policy-workload association tells gWLM which policy to use to manage that workload's resource allocation.


available resources 

Cells and I/O chassis that are not assigned to an nPartition; or cores, memory, and I/O resources that are not assigned to a virtual partition. These resources are available to be used in new partitions or can be added to existing partitions.


average 

The sum of all the utilization values divided by the number of data points for the selected time interval.


AVIO 

Accelerated Virtual Input/Output. An I/O protocol that improves virtual I/O performance for network and storage devices used within the Integrity VM environment. The protocol also enables support for a greater number of virtual I/O devices per guest. Participating guests must include a virtual I/O device configured to use the AVIO protocol.


B

backing store 

A device that is accessible to the Integrity VM Host and maps to a storage device on a virtual machine.


base cabinet 

A compute cabinet that can be used as the only compute cabinet in a complex, or as half of a dual compute cabinet complex. A base cabinet is always physically the left cabinet in the pair (when viewed from the front) and is always the cabinet that contains the Service Processor.

See also cabinet, expansion cabinet.


base cell 

A cell in a partitionable system. In future versions of partition management software, base cells may be distinguished from other cell types. A base cell does not participate in interleaved memory if the cell is online activated and an online re-interleave is not done, or if the cell's failure usage flag is set to Base, No Interleave when the partition is booted after a hardware failure.

See also floating cell.


baseline 

A timeless demand profile used to generate demand profiles in forecasting.


BIB 

Boot-is-blocked. The state of a cell that is powered on but not allowed to boot. BIB exists as soon as power is enabled to a cell, although the system firmware completes its power-on self-test sequence before waiting for BIB to be cleared by the Service Processor. BIB is cleared when the Service Processor is told to boot an nPartition. BIB is also cleared when the system firmware determines that there is no active Service Processor in a complex.


BladeSystem 

HP BladeSystem is an infrastructure in a box that can support a combination of virtual machines, storage blades, and server blades. It comprises server blade compute nodes, integrated connectivity to data and storage networks, and shared power subsystems.

See also BladeSystem enclosure, BladeSystem Integrated Manager.


BladeSystem enclosure 

Hardware solution for consolidating server blades and all supporting infrastructure elements (such as storage, network, and power) into a single unit.

See also BladeSystem Integrated Manager.


BladeSystem Integrated Manager 

A component in HP Systems Insight Manager (HP SIM) that provides streamlined management for the entire HP BladeSystem product family. It enables users to quickly navigate their HP BladeSystem environments, including server blades, enclosure infrastructures, racks, and integrated switches, through automatically generated blade-rack picture views and hierarchical trees. Accessible from an icon on the HP Virtualization Manager's Visualization view.


boot-is-blocked 

See BIB.


bound core 

For vPars versions prior to A.04.xx, a core that can process interrupts for a virtual partition. Bound cores cannot be migrated from one virtual partition to another if either of the partitions is running. Every virtual partition must have at least one bound core.

See also unbound core.


business period 

The time interval (a day or a week) for which to create an HP Capacity Advisor report.


C

cabinet 

The physical enclosure that contains cells or I/O chassis. A cabinet also includes hardware that provides power and cooling. Some cell-based servers support cabling several cabinets together to form a single complex.

See also base cabinet, cabinet, compute cabinet, expansion cabinet, I/O expansion cabinet.


cabinet blowers 

The main cooling fans on top of HP Superdome server compute cabinets. They provide the main airflow through the cabinet.


Capacity Advisor 

HP Capacity Advisor. The HP VSE Management Software application that performs analysis and planning of workloads on a system or across a set of systems.


capacity planning 

The analysis and planning of workloads on a system or across a set of systems.


capacity-planning simulation 

The process of combining workload demand profiles, as prescribed by a scenario, to estimate the demand profiles of the systems that contain the workloads. Statistics gathered from the simulation can be summarized in reports.


CC 

Cell controller. A chip located on every cell board that has interfaces to the cores and memory on the cell. The cell controller also has an interface to a system bus adapter and to the fabric. The cell controller maintains data coherency across the cells in an nPartition.


cell 

A circuit board that contains processors and memory, all controlled by a cell controller (CC). A cell is the basic building block of an nPartition in a complex.


cell controller 

See CC.


cell local memory 

See CLM.


cell OLA 

Cell online activation. The process of changing an inactive cell to an active cell in a booted partition without requiring a reboot. If such a cell is attached to a powered-on I/O chassis, then the chassis is also activated as part of the cell OLA. Some operating systems do not support online activation of cells.

See also floating cells.


cell online activation 

See cell OLA.


cell power on/off 

Enable or disable power to a cell. A cell cannot become active until power has been enabled. It must be inactive before power can be disabled. A cell location must be populated in order to enable power. Physical removal of a cell must not occur until power has been disabled.

Powering a cell on or off will also power on or off an I/O chassis that is attached to the cell.


cell-based server 

A server in which all cores and memory are contained in cells, each of which can be assigned for exclusive use by an nPartition. Each nPartition runs its own instance of an operating system.


central management server 

See CMS.


chassis log 

Term used for event log on cell-based servers based on the PA-8700 processor.


CLI 

Command line interface. An operating system shell for direct entry of commands by the user.

See also GUI.


clipping 

In HP Global Workload Manager (gWLM), the limiting of a policy's resource request.

Types of clipping include:

  • Compartment clipping.  A workload's compartment is already at its maximum size (for example, as set using a vPars command), but policy requests are trying to increase it beyond its configured maximum.

  • Policy clipping.  A workload is receiving the maximum CPU allocation allowed based on its policy; however, the request would be higher if the policy maximum were higher.

  • Priority clipping.  There are not enough resources for the compartments at lower priority levels because resources are required for compartments at higher priority levels. Note that resources are allocated for fixed policies, OwnBorrow policies, and policy minimums before gWLM considers priorities.


CLM 

Cell local memory. Cell memory that is not interleaved. A page of cell local memory comes from a single cell. Cell local memory provides better performance than interleaved memory for processes running on the cores in the cell that contains the memory.

See also interleaved memory.


cluster 

A set of two or more systems configured together to host workloads, such that users are unaware that more than one system is hosting the workload.


CMS 

Central management server. A system in the management domain that executes the HP Systems Insight Manager (HP SIM) software. All central operations within HP SIM are initiated from this system.


codeword 

The mechanism used with HP Instant Capacity (iCAP) versions B.06.x and later for adjusting available usage rights for system components (RTU codewords), for applying an amount of temporary capacity to a system (TiCAP codewords), and for applying Sharing Rights to a GiCAP system to enable the creation of one or more groups (GiCAP codewords). Codewords are purchased from HP and retrieved from the Utility Pricing Solutions Portal.

See also RTU, usage rights.


command line interface 

See CLI.


compartment 

An nPartition, virtual partition, virtual machine, or resource partition whose resources are allocated by HP Global Workload Manager (gWLM).

Multiple compartments are grouped to form a shared resource domain (SRD). The compartments all share the resources of the SRD. A compartment can be in only one SRD. Each compartment holds a workload. gWLM manages each workload's resource allocation by adjusting the resource allocation of its compartment.


compartment consumption 

The amount of a resource being consumed by all of the cores in a compartment. For example, if the processes in a compartment consume a total of two cores, the compartment consumption of cores is two.


Compartment Max 

The maximum amount of a resource that a compartment can have. This value is the maximum resource allocation allowed by the underlying compartment. However, HP Global Workload Manager (gWLM) might reduce this number at times because an SRD has a large number of compartments and each compartment must receive a minimum portion of the resources.

See also Max Size.


Compartment Min 

The minimum amount of a resource that a compartment can have. This value is the minimum resource allocation required by the underlying compartment.

See also Min Size.


compartment utilization 

The compartment consumption of a given resource as a percentage of the compartment's size. For example, if a compartment's consumption is two cores and its size is four cores, the compartment utilization of cores is 50%.


complex 

A complex includes one or more cabinets that are cabled together and all of the hardware resources that they contain. A complex has a single Service Processor.

See also server, system.


complex profile 

The data structure managed by the Service Processor that represents the configuration of a complex. The complex profile consists of the Stable Complex Configuration Data for the entire complex, and Partition Configuration Data for each nPartition in the complex.


compute cabinet 

Any cabinet containing cells. An I/O expansion cabinet is not a compute cabinet.


conditional policy 

A policy for managing a workload's compartment. This type of policy indicates a policy that HP Global Workload Manager (gWLM) should use when a certain condition occurs.


configured processor 

A processor that has been configured as the boot console handler and is now available for activation by the HP Instant Capacity (iCAP) software.


constraints 

Resource allocation restrictions imposed by either the customer (for example, workload placement restrictions), or the HP Virtual Server Environment (for example, a cell cannot be subdivided across an nPartition).

See also policy.


convergence rate 

Indicator of workload sensitivity to changes in CPU allocation. Larger values produce larger changes in the allocation, causing faster convergence on the policy's target; smaller values produce slower convergence on the target. The default rate is 1.0.


core 

The actual data-processing engine within a processor. A single processor might have multiple cores, and a core might support multiple execution threads.

See also processor.


core cell 

Each nPartition has one cell that system firmware selects at boot time to be the core cell. This cell must be attached to an I/O chassis that contains core I/O. The core cell has the following unique characteristics:

  • It must be a base cell.

  • The nPartition's console uses the partition console interface in the core I/O that is attached to the core cell.

  • The nPartition's real-time clock is located in the core cell's processor dependent hardware.

  • The core cell is used by system firmware as a master copy for some internal data structures.

  • The Service Processor passes event logs to the core cell.

  • The monarch processor is on the core cell.

  • Compatibility of other cells in the nPartition is checked against the core cell.


core I/O 

I/O hardware that provides the base set of I/O functions required by every nPartition. Core I/O includes the partition console interface and 10/100 BaseT network interface.


core-cell choices 

Information in each nPartition's Partition Configuration Data that guides system firmware in choosing the nPartition's core cell. Cells that are identified as core cell choices are tried first (in the order specified) before system firmware applies its default core-cell selection algorithm.


cross-bar chip 

See XBC.


current virtual partition 

The virtual partition that is running the vPars command currently being executed.

See also local nPartition.


custom policy 

A policy for managing the resources available to a workload. This type of policy allows you to provide your own metric. HP Global Workload Manager (gWLM) then manages an associated workload, adjusting the resource allocation as needed based on the value of the metric. You update values for the metric using the gwlmsend command on the operating system instance where the workload is running.


D

deactivate cell 

The process of changing an active cell into an inactive cell. A cell becomes inactive when a shutdown for reconfiguration operation is performed on its nPartition. A cell can also be deactivated by setting its use-on-next-boot value to No and then performing a reboot for reconfiguration operation on the nPartition.


deactivate I/O chassis 

The process of changing an active I/O chassis into an inactive I/O chassis. An I/O chassis is deactivated when the cell to which it is attached is deactivated.


deactivated core 

See inactive core.


deconfigured processor 

A processor that has not yet been configured at the boot console handler. HP Instant Capacity (iCAP) and HP Pay per use software cannot activate a processor that is deconfigured.


demand profile 

A set of resource-demand readings made at regular intervals for some period of time. The demand profile of a workload, system, or complex is used when doing capacity planning. Demand profiles can be based on historical data or computed as part of a forecast.


deploy 
  1. In HP Systems Insight Manager (HP SIM), to implement one or more components such as software, drivers, or licenses, rendering them under control of HP SIM.

  2. In HP Global Workload Manager (gWLM), to enable gWLM control of a shared resource domain (SRD).

    Deploying an SRD in managed mode allows gWLM to control resource allocation within the SRD. For example, in an SRD that is based on processor sets (PSETs) for compartments, deploying an SRD in managed mode allows gWLM to migrate processing cores between PSETs.

    When deploying an SRD in advisory mode, gWLM reports only what the allocation would be without actually affecting resource allocations on a system.

See also undeploy.


DIMM 

Dual In-line Memory Module. A standard memory-chip format.


discovery 
  1. In system management applications, the process of finding and identifying network objects. In HP Systems Insight Manager (HP SIM), discovery finds and identifies all the HP systems within a specified network. In HP Application Discovery, discovery finds and identifies all running and installed applications within a specified network.

  2. HP Global Workload Manager (gWLM) can examine systems that you specify and automatically identify the nPartitions, virtual partitions, virtual machines, processor sets (PSETs), and Fair-Share Scheduler (FSS) groups that are present on those systems. gWLM can also identify iCAP and TiCAP as well as GiCAP groups. You then form SRDs using the discovered items.


discovery ratio 

As used by HP Application Discovery, this is a comparison of matched to unmatched processes running on a host. The ratio is the percentage of processes that can be matched to discovered applications.


Dual In-line Memory Module 

See DIMM.


dynamic processor migration 

A vPars feature that allows you to add unbound cores to a virtual partition, or remove them from a virtual partition, while the virtual partition is running.


E

echelon 

A set of DIMMs installed as a single failure group. If any DIMM in the echelon fails or is deconfigured, the entire echelon is deconfigured. Some HP server models use an echelon size of 4 DIMMs; others use an echelon size of 2 DIMMs.


Effective Max 

See Max Size.


Effective Min 

See Min Size.


entitlement 
  1. The amount of a system resource (for example, processor) that is guaranteed to a virtual machine. The actual allocation of resources to the virtual machine may be greater or less than its entitlement depending on the virtual machine's demand for processor resources and the overall system processor load.

  2. The amount of a resource that is set aside for a compartment.


event log 

Information about system events made available from the source of the event to other parts of a server complex. An event log indicates what event has occurred, when and where it happened, and its severity (the alert level). Event logs do not rely on normal I/O operation.

The term “chassis log” was used in place of “event log” on earlier server models.


expansion cabinet 

A specially configured compute cabinet that can be connected to a base cabinet to create a dual-compute-cabinet complex. The expansion cabinet is always the right-hand cabinet in the pair (when viewed from the front) and contains a hub to connect it to the Service Processor in the base cabinet.

See also cabinet, IOX.


F

fabric 

Within a complex, the interconnect composed of cross-bar chips (XBC) and cells.


failover 

The operation that takes place when a primary service (network, storage, or CPU) fails, and the application continues operation on a secondary unit.


failure usage flag 

A per-cell flag in the Partition Configuration Data that specifies how the cell will be reactivated and whether it will participate in memory interleave after a hardware failure.


Fair-Share Scheduler group 

See FSS group.


field replaceable unit 

See FRU.


fixed policy 

An HP Global Workload Manager (gWLM) policy for managing a workload's compartment. This type of policy allocates a workload's compartment a fixed (constant) amount of CPU resources.

Fixed policies do not have a settable priority. gWLM satisfies compartment minimums first; next, it satisfies both fixed policies and policy minimums; finally, it satisfies other policy types.


floater processor 

See unbound core.


floating cell 

A cell in a partition that does not participate in interleaved memory (all of the cell's memory is used as cell local memory). A floating cell cannot be a partition's core cell.

It is generally easier to perform cell online activation of a floating cell than of a base cell, because no online re-interleave operation is needed. However, if a floating cell is attached to an I/O chassis, then the ability to do online activation is limited by the ability to do online activation on the chassis and cards in the chassis.


forecast 

A prediction of system utilizations and workload demand profiles for some future time.


forecast data range 

A time interval specifying the set of historical data to use for generating a forecast.


forecast model 

A combination of a forecast data range and a set of annual projected growth rates that are used to estimate future utilization.


free cell 

A cell that is not assigned to an nPartition. This applies to any cell location, regardless of whether the slot exists or is populated.


FRU 

Field replaceable unit. Hardware that can be replaced by a field engineer. This includes all components that are hot-pluggable or hot-swappable. It also includes many components that must be powered off to be replaced.


FRU ID 

Data that provides identification information about a field replaceable unit (FRU), such as the part number, serial number, revision and test history. The FRU ID typically is stored in an EEPROM that is located on the FRU.


FSS group 

Fair-Share Scheduler group. A group of processes that has its CPU allocation managed by the HP-UX FSS. FSS groups allow you to allocate fractions of cores, rather than only whole cores, to the processes in the group.


G

GiCAP 

HP Global Instant Capacity. Software that enables you to move usage rights for Instant Capacity components within a group of servers. The GiCAP Group Manager page can be launched from an icon on the HP Virtualization Manager's Visualization view.

See also iCAP, iCAP component, TiCAP.


Global Instant Capacity 

See GiCAP.


Global Workload Manager 

See gWLM.


GNI 

Global noninterleaved memory, another name for cell local memory (CLM).


guest 

See virtual machine.


guest OS 

The operating system that is running on a virtual machine.


GUI 

Graphical User Interface. A visually-oriented user interface in which components and actions can be selected by clicking on objects and menus instead of typing command lines.

See also CLI.


gWLM 

HP Global Workload Manager. The HP VSE Management Software application that allows you to centrally define resource-sharing policies that you can use across multiple HP servers. These policies increase system utilization and facilitate controlled sharing of system resources. gWLM's monitoring abilities provide both real-time and historical monitoring of the resource allocation.


H

HA 

High availability. The ability of a server or partition to continue operating despite the failure of one or more components. High availability requires redundant resources, such as CPU resources and memory, in specific combinations.

The high-availability status of a device group is usually indicated by the following notation.

N+  

The device group can experience a device failure and still function normally.

N  

The device group has just enough good devices to function normally. Subsequent failure of a device in the group can cause the cabinet to shut down.

N-  

The device group does not have enough good components to function normally. If a cabinet is running and goes into an N- cooling state, then the cabinet is automatically shut down. If a cabinet has an N- power state, then devices in the group cannot be powered on. This means that if the cabinet is running, it continues running, but no additional devices can be powered on. If the cabinet is off and comes up in the N- power state, then none of its devices can be powered on.


hard reset 

A hard reset, like the reset (RS) command available at the Service Processor prompt, immediately stops the operating system and all applications, without forcing a crash dump.

See also TOC.


headroom 

In general, the amount of a computing resource that is available on a system after all requirements for applications on the system are accounted for.

In HP Capacity Advisor, requirements for applications include the utilization limits set for each application.

See also relative headroom.


high availability 

See HA.


host 
  1. A system or partition that is running an instance of an operating system.

  2. The physical machine that is the HP Integrity Virtual Machines VM Host for one or more virtual machines.


host name 

The name of a system or partition that is running an OS instance.


host OS 

The operating system that is running on the host machine.


hot-pluggable 

A hardware component that can be added to or removed from a cabinet, with software intervention, while the cabinet remains operational. Examples are PCI I/O cards, cells, and I/O chassis.

These components are hot-pluggable only to the extent that operating system and hardware support is present. For example, with the initial HP-UX 11i release, a cell is hot-pluggable because it can be physically installed into a "hot" cabinet and powered on, but that version of the OS does not support cell online activation.

See also hot-swappable, FRU.


hot-swappable 

A hardware component that can be added to or removed from a cabinet, without software intervention, while the cabinet remains operational. Examples are bulk power supplies, cabinet blowers, and I/O fans. These items are hot-swappable if their removal does not create an N-1 HA situation. For example, if a cabinet's power status is N+1, then any one of the bulk power supplies can be removed without affecting the operation of the cabinet.

See also hot-pluggable, FRU.


HP SIM 

HP Systems Insight Manager (HP SIM). The platform and framework on which the HP VSE Management Software products are deployed.


hyper-threading 

Intel® Hyper-Threading Technology. The ability of certain processors to create a second virtual core that allows additional efficiencies of processing. This is not a true multi-core processor, but it adds performance benefits. True multi-core processors typically deliver much greater performance than equivalent hyper-threading technology.


I

I/O bay 

The physical location in a cabinet where an I/O support structure is located.


I/O chassis 

A PCI or PCI-X card cage and associated backplane that contains a system bus adapter and one or more local bus adapters. An I/O chassis may or may not be physically removable.


I/O chassis enclosure 

See ICE.


I/O Dependent Code 

See IODC.


I/O expansion cabinet 

See IOX.


I/O fans 

The fans that are used to cool an I/O chassis. Found in both I/O expansion cabinets and compute cabinets. I/O fans are distinct from cabinet blowers.


I/O support structure 

A physical structure in cabinets where one or more I/O chassis are located. In some cabinets the I/O support structure is referred to as an I/O support tray, in other cabinets as an I/O chassis enclosure (ICE). The different names reflect the different physical characteristics of the support structures. The I/O support structure is removable in some cabinet types (for example, I/O expansion cabinet) and is not removable in others.


iCAP 

HP Instant Capacity. The HP Utility Pricing Solutions product that allows you to purchase and install additional processing power through the use of a two-step purchase model. Initially, you purchase system components (cores, cell boards, memory) at a fraction of the regular price because the usage rights are not included. These Instant Capacity components are inactive but installed and ready for use. When extra capacity is needed, you pay the remainder of the regular price for the usage rights to activate the components. If the regular price for the component is reduced by the time the usage rights are purchased, the remainder price is proportionally reduced, providing additional savings.

Earlier versions of iCAP were referred to as Instant Capacity on Demand, or iCOD.

See also GiCAP, TiCAP.


iCAP component 

Also called a component without usage rights, an HP Instant Capacity (iCAP) component is a core, cell board, or memory that is physically installed in an iCAP system but is not authorized for use. Before it can be used, a right to use (RTU) must be purchased and a codeword must be applied to the system.


iCAP core 

Also referred to as a core without usage rights, a core that is physically installed in an HP Instant Capacity (iCAP) system but does not have usage rights and is not activated. After obtaining usage rights, iCAP cores can be turned on by the iCAP software or during installation. Cores with usage rights are activated with the icapmodify command (or the vparmodify command in a virtual partition) while HP-UX is running.


ICE 

I/O chassis enclosure. A specific type of I/O bay on some models of HP Superdome server. An ICE provides mechanical and electrical support for up to two 12-slot I/O chassis.


iCOD 

See iCAP.


iCOD component 

See iCAP component.


iCOD core 

See iCAP core.


inactive cell 

A cell that is not available for use by software running on an nPartition. This term is usually used to describe a cell that has the following status (though any cell that is not active is by definition inactive):

  • The slot is present and is populated.

  • Power is enabled.

  • Boot-is-blocked.

  • The cell is assigned to an nPartition.

See also active cell.


inactive core 

A core that either has not yet been activated or that has been turned off by the HP Instant Capacity iCAP software and returned to the pool of inactive cores. These cores are available for activation. New HP-UX processes are not assigned to a deactivated core, and all processes running on the deactivated core are migrated to other cores (with the exception that interrupt handlers might not be migrated from deactivated cores).

See also activated core, iCAP core.


inactive I/O chassis 

An I/O chassis that is not available for use by the software that is running on an nPartition. An I/O chassis is inactive when it is attached to an inactive cell.

See also active I/O chassis.


inactive logical server 

A logical server that contains metadata but is not currently bound to a specific physical server or system. Inactive logical servers that have never been activated might or might not be bound to storage.

See also active logical server, logical server.


inactive nPartition 

An nPartition in which all of its cells are inactive.

See also active nPartition.


initial system loader 

See ISL.


Instant Capacity 

See iCAP.


Instant Capacity component 

See iCAP component.


Instant Capacity core 

See iCAP core.


Integrity Virtual Machines 

See Integrity VM.


Integrity Virtual Machines Manager 

See VM Manager.


Integrity VM 

HP Integrity Virtual Machines. A soft partitioning virtualization product that allows you to install and run multiple systems (virtual machines) on the same physical host system (Integrity server or nPartition). The Integrity server or nPartition acts as a VM Host for the virtual machines (also referred to as guests). The virtual machines share a single set of physical hardware resources, yet each virtual machine is a complete environment in itself and runs its own instance of an operating system (referred to as a guest OS).

See also virtual machine, VM Host.


Intelligent Platform Management Interface 

See IPMI.


interleaved memory 

Memory that can be interleaved across more than one cell. Interleaved memory presents a single logical memory address range that is mapped to different physical memory ranges across multiple cells.

See also CLM.


invalid data 

In HP Capacity Advisor, data that could potentially skew reporting results and lead to inaccurate or misleading conclusions when capacity planning. Examples of events that Capacity Advisor can recognize as potential sources of invalid points include the following:

  • System downtime during a data collection period

  • Data manually marked by the user as invalid

  • Partial collection from a virtual machine or a VM host

See also missing data, valid data.


IODC 

I/O Dependent Code. IODC provides a uniform, architected mechanism to obtain platform information. IODC is composed of two parts. The first part is a set of up to 16 bytes that identify and characterize hardware modules. The second part is a set of entry points that provide a standard procedural interface for performing module-type dependent operations such as boot device, keyboard, and display device initialization and Input/Output routines. IODC is documented in the PA-RISC 1.1 I/O Firmware Architecture Reference Specification. NOTE: this link will take you outside of this help system. Your browser must have access to the internet to follow this link.


IOX 

I/O expansion cabinet. A cabinet that contains I/O devices (card cages) but no cells.

See also expansion cabinet.


IPMI 

Intelligent Platform Management Interface. A set of standards for remote multiplatform server management. IPMI uses intelligent platform management hardware and a message-based interface.


ISL 

Initial system loader. This program implements the portion of the bootstrap process that is independent of the operating system (OS). The ISL is loaded and executed after self-test and initialization have completed successfully. It provides an interface to select an OS or load a predefined default OS.


Itanium®-based systems 

Systems built on any version of the Intel® Itanium® architecture.


L

LBA 

Local bus adapter. A device that connects the system bus adapter (SBA) to an I/O bus, such as PCI. Multiple LBAs are connected to a single SBA.


leaf node 

An object at the lowest level of a graphical tree view. Leaf nodes have no child nodes.


local bus adapter 

See LBA.


local nPartition 

Used in a context where an nPartition command is being executed, the local nPartition is the nPartition that is running the command.

See also current virtual partition, remote nPartition.


logical server 

A feature provided by HP Virtualization Manager, a logical server is a set of configuration and metadata that you create, activate, and assign to operate within a physical or virtual machine. An active logical server can be moved from one location to another, and its characteristics can be modified. This feature allows you to populate an enclosure, load balance servers, and evacuate servers in case of disaster; it allows you to provision resources only when needed and increase utilization of limited compute resources.

See also active logical server, inactive logical server.


LTU 

License to use. One of the three main components of HP Global Workload Manager (gWLM): CMS, agents, and LTU for each agent. The CMS allows you to control and monitor gWLM. The agents run on the systems where you are managing workloads. You install an LTU on each system that runs an agent in order to continue full agent functionality beyond the initial trial period.


M

managed mode 

SRD managed mode lets HP Global Workload Manager (gWLM) automatically adjust the resource allocations for your compartments.

See also advisory mode, deploy.


managed resource 

A resource that can be allocated and controlled by HP Virtualization Manager. Managed resources include: cores, memory, disks, and I/O bandwidth.


managed system 

A server or other system that can be managed by HP Systems Insight Manager (HP SIM) from a CMS . A managed system can be managed by more than one CMS.


managed workload 

A workload that is managed by HP Global Workload Manager (gWLM).


management domain 

A CMS and its managed systems.


Management Processor 

See Service Processor.


master I/O backplane 

The main backplane in a complex into which you plug an I/O chassis.


max 15-min 

Maximum 15-minute sustained: data given in the Utilization Metric Summary screen of the HP Capacity Advisor Profile Viewer, the highest value in the selected time interval that was sustained for at least 15 minutes.


Max Size 

The maximum amount of CPU resources, measured in cores, that an HP Global Workload Manager (gWLM) policy requests for its associated workloads.

In graphs, the Effective Max is shown. This value is the smaller of Max Size and Compartment Max (the maximum amount of a resource that a compartment can have).


measured value 

The current value of a metric being used in a policy.


memory echelon 

See echelon.


metric 

A specific measurement that defines a performance characteristic.


metric view selection 

In HP Capacity Advisor, a combination of the statistical model (such as peak or average) used to calculate the metric and whether it is to be presented as a percentage or an absolute value.


migrating processing cores 

The process of activating and deactivating cores across partitions for load balancing.


Min Size 

The minimum amount of CPU resources, measured in cores, that an HP Global Workload Manager (gWLM) policy requests for its associated workloads.

In graphs, the Effective Min is shown. This value is the larger of Min Size and Compartment Min (the minimum amount of a resource that a compartment can have).


missing data 

Data that was not collected by HP Capacity Advisor, perhaps because a monitored system was down during data collection. Such data is not used in analysis, though it may be shown in the Profile Viewer.

See also invalid data, valid data.


monarch processor 

Also known as the boot processor, this is the main controlling core of the operating system. This core is designated as CPU 0. The LPMC monitor does not deactivate or replace a failing monarch processor.


monitored workload 

A workload that can be monitored by HP Virtualization Manager but has no policy associated with it. Monitored workloads are not managed by HP Global Workload Manager (gWLM).


multithreading 

The ability of an application and operating system to allow parallel computing by dividing processing between multiple processors or cores.


N

node 

See system.


nPartition 

A partition in a cell-based server that consists of one or more cells, and one or more I/O chassis. Each nPartition operates independently of other nPartitions and either runs a single instance of an operating system or is further divided into virtual partitions.

nPartitions can be used as compartments managed by HP Global Workload Manager (gWLM) as long as several requirements are met. Refer to the gWLM online help for a description of nPartition requirements.

See also virtual partition.


nPartition Configuration Privilege 

A feature available on newer cell-based servers that can be used to restrict the ability of privileged users on one nPartition from affecting other nPartitions. This feature is configured by using the PARPERM command at the Service Processor command interface. For more information, refer to the Partition Manager Configuration Privilege topic.


nPartition Provider 

The WBEM services provider for nPartition information about cell-based servers.


nPartition server 

See cell-based server.


O

online activation 

The ability to activate a deactivated core using HP Instant Capacity (iCAP) software while HP-UX is running. No reboot is required. This is done with the icapmodify command or, in a virtual partition, with the vparmodify command. Online activation is the default behavior of iCAP.


OS 

Operating system.


OwnBorrow policy 

An HP Global Workload Manager (gWLM) policy for managing a workload's compartment. This type of policy allows you to set the following values:

  • The minimum amount of CPU resources that a compartment should ever have.

  • The maximum amount of CPU resources that a compartment should ever have.

  • The amount of CPU resources that a compartment owns.

A compartment is allocated the resources it owns when they are needed. When a workload is not busy, gWLM may lend its CPU resources to other workloads that are busy, as long as the compartment minimum is maintained. When it becomes busy, a compartment will immediately re-acquire any resources that were loaned to other compartments. A compartment with a busy workload can borrow CPU resources up to its allowed maximum, if resources are available from other compartments.

You can assign a weight to an OwnBorrow policy in order to prioritize resource allocation.


owned size 

Resources, measured in cores, that are allocated to a compartment when they are required. A compartment can lend its owned resources to other compartments.


P

PACI 

Partition console interface. Provides console access for an nPartition. PACI is a part of core I/O.


package 

A package groups application services (individual HP-UX processes) together.

See also Serviceguard package.


parked workload 

A workload that is not currently associated with a system. A workload becomes parked if its system is set to “none” when it is created or later modified. A parked workload that was previously associated with a system may have historical data associated with it from HP Capacity Advisor or HP Global Workload Manager (gWLM). As with any workload, the historical data will be lost if the workload is deleted.

When migrating a workload from one system to another, it may be useful to park the workload (removing the association with the original system) until the new system becomes available. This preserves the historical data for the workload across the migration.


partition 
  1. A subset of server hardware that includes core, memory, and I/O resources on which an operating system (OS) can be run. This type of partitioning allows a single server to run an OS independently in each partition with isolation from other partitions.

  2. A resource partition, made up of either a Fair-Share Scheduler (FSS) group or a processor set, that runs within a single OS. This type of partitioning controls resource allocations within an OS.

See also nPartition, virtual partition.


Partition Configuration Data 

See PCD.


partition console interface 

See PACI.


partition database 

See vPars partition database.


Partition Manager 

The HP VSE Management Software application that manages and configures nPartitions on