HP XP 9000 User manual

Brand: HP

Model: XP 9000

Type: User manual

XP 9000 Cache Partition User Guide

Abstract

This guide describes how to use the HP XP P9000 Cache Partition Software on HP XP P9000 disk arrays. The intended audience

is a storage administrator or authorized service provider with independent knowledge of HP XP P9000 disk arrays and HP XP

P9000 software.

HP Part Number: AV400-96477

Published: August 2012

Edition: Eighth

Confidential computer software. Valid license from HP required for possession, use or copying. Consistent with FAR 12.211 and 12.212, Commercial

Computer Software, Computer Software Documentation, and Technical Data for Commercial Items are licensed to the U.S. Government under

vendor's standard commercial license.

The information contained herein is subject to change without notice. The only warranties for HP products and services are set forth in the express

warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP shall

not be liable for technical or editorial errors or omissions contained herein.

This document is intended for system administrators and HP representatives who are involved in installing, configuring, and operating the P9500

storage system.

Readers of this document should meet the following requirements:

• Understand RAID storage systems and their basic functions.

• Be familiar with the HP XP P9000 Owner Guide.

• Be familiar with the Remote Web Console software.

Acknowledgements

Microsoft®, Windows®, Windows® XP, and Windows NT® are U.S. registered trademarks of Microsoft Corporation.

Export Requirements

You may not export or re-export this document or any copy or adaptation in violation of export laws or regulations.

Without limiting the foregoing, this document may not be exported, re-exported, transferred or downloaded to or within (or to a national resident

of) countries under U.S. economic embargo, including Cuba, Iran, North Korea, Sudan, and Syria. This list is subject to change.

This document may not be exported, re-exported, transferred, or downloaded to persons or entities listed on the U.S. Department of Commerce

Denied Persons List, Entity List of proliferation concern or on any U.S. Treasury Department Designated Nationals exclusion list, or to parties directly

or indirectly involved in the development or production of nuclear, chemical, biological weapons, or in missile technology programs as specified

in the U.S. Export Administration Regulations (15 CFR 744).

Revision History

DescriptionDateEdition

Applies to microcode version 70-01-01-00/00 or later.October 2010First

Applies to microcode version 70-01-24-00/00 or later.November 2010Second

Applies to microcode version 70-01-62-00/00 or later.January 2011Third

Applies to microcode version 70-02-01-00/00 or later.May 2011Fourth

Applies to microcode version 70-02-7x-00/00 or laterSeptember 2011Fifth

Applies to microcode version 70-03-00-00/00 or later.November 2011Sixth

Applies to microcode version 70-03-3x-00/00 or later.April 2012Seventh

Applies to microcode version 70-04-00-00/00 or later.August 2012Eighth

Contents

1 Creating virtual cache partitions...................................................................4

About virtual cache partitions.....................................................................................................4

Cache capacity for a CLPR........................................................................................................4

Cache partitioning rules and guidelines.......................................................................................7

Partitioning cache.....................................................................................................................9

Cache partition work flows....................................................................................................9

Creating a CLPR..................................................................................................................9

Migrating resources to and from a CLPR................................................................................10

Deleting a CLPR ................................................................................................................11

2 Troubleshooting........................................................................................12

Troubleshooting Cache Partition................................................................................................12

3 Support and other resources......................................................................13

Contacting HP........................................................................................................................13

Subscription service............................................................................................................13

Documentation feedback....................................................................................................13

Related information.................................................................................................................13

HP websites......................................................................................................................13

Conventions for storage capacity values....................................................................................14

Typographic conventions.........................................................................................................14

A Cache Partition GUI reference....................................................................16

Partition Definition tab (Storage System selected).........................................................................16

Partition Definition tab, Cache Logical Partition window (CLPR selected).........................................17

Partition Definition tab, Cache Logical Partition window (each CLPR information).............................17

Select CU dialog box..............................................................................................................19

Glossary....................................................................................................21

Index.........................................................................................................22

Contents 3

1 Creating virtual cache partitions

This topic provides detailed instructions for dividing storage system cache memory into virtual

cache logical partitions (CLPRs) using Cache Partition software.

About virtual cache partitions

If one storage system is shared with multiple hosts, one host reading or writing a large amount of

data can require enough of the storage system’s cache memory to affect other users. The Cache

Partition function allows improved I/O performance by dividing storage system cache memory

into multiple virtual cache memories (cache logical partitions or CLPRs).

Partitioning cache matches data to appropriate storage resources based on availability,

performance, capacity, and cost. It improves flexibility by allowing dynamic changes to cache

partitions while in use.

Partitioning cache dedicates cache resources for exclusive use by specific applications to maintain

priority and quality of service for business-critical applications. Storage administrators can secure

and/or restrict access to storage resources to ensure confidentiality for specific applications. By

dedicating resources to each partition as needed, a high quality of service can be maintained for

all users.

The following illustrates the use of cache memory within a corporation. In this example, cache

memory is partitioned into three segments of 40 GB, each of which is allocated to a branch office.

The host of branch A has a heavy I/O load. Because the cache memory is partitioned, that heavy

I/O load does not impact the cache memory for the other two branches.

Cache capacity for a CLPR

A CLPR is a pool of the cache and parity groups in the storage system. Partitioning cache into one

or more CLPRs allows storage administrators to dedicate individual CLPRs to a different host,

preventing I/O contention for cache memory.

Before you partition cache memory into CLPRs, calculate the cache capacity that will be needed

on your storage system. If necessary, install additional cache memory.

When you create a CLPR, the recommended cache capacity is determined by the conditions such

as: the number of mounted processor blades, RAID level, the number of drives that are installed

4 Creating virtual cache partitions

on the storage system, and whether Thin Provisioning, Smart Tiers, Cache Residency, Compatible

XRC, or External Storage is used or not (enabled or disabled).

Calculate the recommended cache capacity for a CLPR using the formula below:

Recommended cache capacity (GB) for a CLPR = (CLPR capacity (GB) – ceiling (Cache Residency

extents (MB)/ 2,048) × 2 GB)

(i) When Thin Provisioning, Smart Tiers, Cache Residency or Compatible XRC

is not used:

When you do not use any of Thin Provisioning, Smart Tiers, Cache Residency, or Compatible XRC

for a CLPR, see the table below for the recommended cache capacity.

Recommended cache capacity for a CLPRNumber of processor bladesTotal capacity of internal VOL* and

external VOL for a CLPR

7 GB or more2Less than 1,500 GB

15 GB or more4

22 GB or more6

30 GB or more8

8 GB or more21,500 GB or more

15 GB or more4

22 GB or more6

30 GB or more8

16 GB or more2 or 42,900 GB or more

22 GB or more6

30 GB or more8

22 GB or more2, 4 or 611,500 GB or more

30 GB or more8

24 GB or more2, 4 or 614,400 GB or more

30 GB or more8

30 GB or more2, 4, 6 or 8100,000 GB or more

32 GB or more128,000 GB or more

40 GB or more182,000 GB or more

48 GB or more218,000 GB or more

56 GB or more254,000 GB or more

64 GB or more290,000 GB or more

72 GB or more326,000 GB or more

* Calculate the internal volume capacity for a CLPR using the formula below.

Internal volume capacity = number of (3D+1P) parity groups x capacity of one HDD x 3 + number of (6D+2P) parity

groups x capacity of one HDD x 6 + number of (7D+1P) parity groups x capacity of one HDD x 7 + number of

(14D+2P) parity groups x capacity of one HDD x 14 + number of (2D+2D) parity groups x capacity of one HDD x 2

When you use an external volume or a virtual volume, you cannot use the above formula. If you

use an external volume, calculate the total capacity of parity groups that are associated with the

CLPR. If you use a virtual volume, calculate the total LDEV capacity of the virtual volume that is

Cache capacity for a CLPR 5

associated with the CLPR. To check the LDEV capacity of the virtual volume, see the LDEV dialog

box in the Basic Information Display dialog box of the Remote Web Console subwindow. For

further information about Remote Web Console subwindow, see the HP XP P9000 Remote Web

Console User Guide.

(ii) When Thin Provisioning or Smart Tiers is used:

When you use Thin Provisioning or Smart Tiers for a CLPR, see the table below for the recommended

cache capacity.

Recommended cache capacity for a CLPRNumber of processor bladesTotal capacity of internal VOL* and

external VOL for a CLPR

12 GB or more2Less than 2,900 GB or more

22 GB or more4

22 GB or more6

42 GB or more8

16 GB or more22,900 GB or more

22 GB or more4

32 GB or more6

42 GB or more8

22 GB or more2 or 411,500 GB or more

32 GB or more6

42 GB or more8

24 GB or more2 or 414,400 GB or more

32 GB or more6

42 GB or more8

32 GB or more2, 4, or 6100,000 GB or more

42 GB or more8

32 GB or more2, 4, or 6128,000 GB or more

42 GB or more8

42 GB or more2, 4, 6, or 8182,000 GB or more

48 GB or more218,000 GB or more

56 GB or more254,000 GB or more

64 GB or more290,000 GB or more

72 GB or more326,000 GB or more

* Calculate the internal volume capacity for a CLPR using the formula below.

Internal volume capacity = number of (3D+1P) parity groups x capacity of one HDD x 3 + number of (6D+2P) parity

groups x capacity of one HDD x 6 + number of (7D+1P) parity groups x capacity of one HDD x 7 + number of

(14D+2P) parity groups x capacity of one HDD x 14 + number of (2D+2D) parity groups x capacity of one HDD x 2

(iii) When Cache Residency is used:

When you use the Priority mode by using Cache Residency for a CLPR, you may want to add

cache capacity depending on the number of areas in which the priority mode is set in addition to

the cache used for Cache Residency. For further information, see the Priority mode section of the

HP XP P9000 Performance for Open and Mainframe Systems User Guide.

6 Creating virtual cache partitions

(iv) When Compatible XRC is used:

When you use Compatible XRC for a CLPR, cache capacity for administrative information called

sidefile is needed. Therefore, you may want to add larger cache capacity than the recommended

cache capacity calculated from (i), (ii), or (iii) with sleep wait threshold in mind.

Calculate the recommended capacity using the formula below:

Recommended cache capacity = (Recommended cache capacity calculated from (i)-(iii)) × 100 /

(100 - (Sleep wait threshold))

(v) When only External Storage is used:

If the CLPR to be created meets the following conditions, the recommended cache memory capacity

in the table below can be applied.

• The CLPR uses only external volumes.

• The transfer speed is not emphasized.

• The cache mode of the mapped volume is Disable.

• The CLPR uses only volumes that are for Open systems.

Recommended cache capacity for a

CLPR

Number of processor

blades

Total capacity of external volume of CLPR in which

only Ext Stor is used

4 GB2 or 4Less than 128,000

8 GB6 or 8

8 GB2 or 4128,000 or more

16 GB6 or 8

When adding cache memory, use either the Standard Cache Access Model mode or the High

Performance Cache Access Model mode. If your storage system has any additional printed circuit

boards (PCBs), you must use the High Performance Cache Access Model mode. For more information

about adding cache memory, contact the HP Technical Support.

Cache partitioning rules and guidelines

Observe the following rules, restrictions, and guidelines when creating cache logical partitions:

For the priority mode cache requirements, see the HP XP P9000 Performance for Open and

Mainframe Systems User Guide.

You can operate Cache Partition from Remote Web Console or RAID Manager. To use RAID

Manager, see the HP XP P9000 RAID Manager User Guide.

Rules

• Cache Partition must be enabled on your system.

• CLPR0 is the default CLPR in a storage system. If you have not yet created any cache logical

partitions, all cache belongs to CLPR0.

• Usually, you can create a CLPR if the storage system has 4 GB cache. However, when creating

a CLPR while using Cache Residency, the remaining cache size, which is calculated by

subtracting Cache Residency size from the cache size of CLPR0, must be 8 GB or more.

• Adding or changing CLPR definitions or configurations may take hours to implement and

cannot be canceled or modified until all changes are complete. For assistance or for more

information, contact your HP account team.

Cache partitioning rules and guidelines 7

Restrictions

The following operations are not allowed when multiple CLPRs are involved:

• Creating LUSE volumes across multiple CLPRs. If you forcibly perform this operation and create

a LUSE across multiple CLPRs, the LUSE volumes cannot be used for Continuous Access

Synchronous or Continuous Access Synchronous Z pair volumes.

• Business Copy Quick Restore operations that affect multiple CLPRs.

• Auto LUN manual migration operations that affect multiple CLPRs.

• A parity group containing LDEVs assigned to Cache Residency cache extents (cache areas)

cannot be migrated to another CLPR. See the HP XP P9000 Performance for Open and

Mainframe Systems User Guide for more information about cache extents.

• If you are using Continuous Access Journal, Continuous Access Journal data volumes and

journal volumes can belong to different CLPRs. All journal volumes in the same journal must

belong to the same CLPR. If not, an error occurs.

Guidelines

• Install any needed additional cache memory before partitioning cache. It will be difficult to

add additional cache memory after partitioning cache into CLPRs.

• If the cache capacity of defined CLPR is decreased by the Cache Residency cache area, cancel

Cache Residency bind mode setting, change the cache capacity of CLPR, and then set the

bind mode or priority mode again.

• Best practice is to create cache logical partitions either during the initial installation and setup

or during a maintenance window, because cache logical partition operations can significantly

degrade host performance. If you must perform such operations on a production machine,

use Performance Monitor to verify that the write pending rate, including spikes, is well below

30%.

The table below shows CLPR names set by default to associated CLPR numbers. Because CLPR

names are reserved, they cannot be set to alternative CLPR numbers. For example, "CLPR2" cannot

be set to the CLPR number 1.

CLPR nameCLPR numberCLPR nameCLPR number

CLPR1616CLPR00

CLPR1717CLPR11

CLPR1818CLPR22

CLPR1919CLPR33

CLPR2020CLPR44

CLPR2121CLPR55

CLPR2222CLPR66

CLPR2323CLPR77

CLPR2424CLPR88

CLPR2525CLPR99

CLPR2626CLPR1010

CLPR2727CLPR1111

CLPR2828CLPR1212

CLPR2929CLPR1313

8 Creating virtual cache partitions

CLPR nameCLPR numberCLPR nameCLPR number

CLPR3030CLPR1414

CLPR3131CLPR1515

Partitioning cache

Cache partition work flows

Creating a CLPR

1. Create a CLPR (see “Creating a CLPR” (page 9)).

2. Migrate resources to the new CLPR (see “Migrating resources to and from a CLPR” (page 10)).

Removing a CLPR

1. Migrate resources from the CLPR that is to be removed (see “Migrating resources to and from

a CLPR” (page 10)).

2. Delete the CLPR (see “Deleting a CLPR ” (page 11)).

Creating a CLPR

Before creating a CLPR, review “Cache partitioning rules and guidelines” (page 7).

1. Click Settings > Environmental Setting > Partition Definition on the menu bar of the Remote

Web Console main window.

2. Click to change the mode from View to Modify.

3. In Cache Partition, open the Partition Definition window, and select a CLPR in the Partition

Definition tree.

4. In the Cache Logical Partition window, right-click a CLPR from the Partition Definition tree and

select Create CLPR. This adds a cache logical partition to the Partition Definition tree. The

maximum number of CLPRs that can be manually created is 31 (not including CLPR0).

5. Select the newly created CLPR to open the Cache Logical Partition window.

Partitioning cache 9

6. In the Detail for CLPR in Storage System section, do the following:

• In CLPR Name field, type the name of the cache logical partition, in up to 16 alphanumeric

characters. However, it cannot be changed to the CLPR name that is reserved for the

storage system. See “Cache partitioning rules and guidelines” (page 7).

• In Cache Size, select the cache capacity. You may select from 4 to 508 GB, in 2 GB

increments. The default value is 4 GB. The size of the cache is allocated from CLPR 0,

but you must leave at least 8 GB remaining in CLPR 0.

• In Cache Residency Size, select the cache capacity. You may select from 4 to 508 GB,

in 2 GB increments. The default value is 4 GB. The size of the cache is allocated from

CLPR0, but you must leave at least 8 GB remaining in CLPR0.

• In Num of Cache Residency Areas, type the desired capacity for the Cache Residency

area. The range of values is 0 to 16384 and the default value is 0.

7. Click Apply. The progress bar appears. The change in cache capacity is reflected in this cache

logical partition and in the CLPR0.

8. To change the settings of an existing CLPR, repeat steps 5 through 7.

At this point, the CLPR has no parity groups. You can now migrate resources to the new CLPR (see

“Migrating resources to and from a CLPR” (page 10)).

Migrating resources to and from a CLPR

After adding a CLPR, you must migrate resources (parity groups) from existing CLPRs to the new

CLPR. Before deleting a CLPR, you must first migrate resources from that CLPR to CLPRs that will

not be deleted.

When migrating resources to and from cache logical partitions:

• You can migrate resources only within the same CU.

• All interleaved parity groups must be in the same CLPR.

• LUSE volumes cannot be set across more than one CLPR.

• If a parity group contains one or more LDEVs that have defined Cache Residency extents, you

cannot migrate that parity group to another CLPR.

To migrate resources to and from a CLPR:

1. Click Settings > Environmental Setting > Partition Definition on the menu bar of the Remote

Web Console main window.

2. Click to change the mode from View to Modify.

3. Access the Logical Partition window, then select a CLPR from the Partition Definition tree.

4. In the Cache Logical Partition window, click Select CU to choose a CU.

5. Specify how you want to view information the CLPR resource list. In the Select CU dialog box,

choose one of the following:

• All CUs: Shows the information about all CUs on the CLPR resource list.

• Choose Specific CU, then specify the LDKC and the CU. This shows only CLPRs from the

selected CU.

• Unallocated: Shows information about only the CUs unallocated to CLPR on the CLPR

resource list.

10 Creating virtual cache partitions

6. Click Set to close the dialog box.

7. From the Cache Logical Partition Resource List, select one or more parity groups to be migrated,

then select Cut.

8. On the Partition Definition tree, right-click the CLPR to which you want to migrate resources,

and then select Paste Resources.

9. Click Apply. The progress bar appears.

Deleting a CLPR

Before deleting a CLPR, be sure to migrate any resources (for example, parity groups) to the CLPR

that will not be deleted (see “Migrating resources to and from a CLPR” (page 10) for more

information).

Unnecessary CLPRs may be deleted, but CLPR0 cannot be deleted.

To delete a CLPR:

1. Click Settings > Environmental Setting > Partition Definition on the menu bar of the Remote

Web Console main window.

2. Click to change the mode from View to Modify.

3. Select a CLPR in the Partition Definition tree to open the Cache Logical Partition window.

4. Right-click the CLPR that you want to delete and select Delete CLPR.

5. Click Apply. The progress bar appears.

Partitioning cache 11

2 Troubleshooting

This topic provides troubleshooting information for Cache Partition software.

Troubleshooting Cache Partition

Displaying an error message

If the settings contain a discrepancy after you click Apply, an error message appears.

To display an error message:

1. Right-click a CLPR on the Partition Definition tree, then select Error Detail to open the message.

2. Review the message and click OK to close the message.

General troubleshooting

The following table provides general troubleshooting instructions for Cache Partition operations.

Table 1 General troubleshooting for Cache Partition operations

CauseError

LUSE volumes cannot be set across more than one CLPR.When you attempt to migrate a parity group

to another CLPR, an LU warning message

appears.

You cannot assign the same name to more than one CLPR. The name you

entered is already being used or is reserved by a system. Enter another

The CLPR name cannot be changed.

name. For more information, see the table in the “Guidelines” (page 8)

section.

The parity group in a CLPR cannot be

migrated to another CLPR.

• Only open-system parity groups can be migrated.

• Make sure that all interleaved parity groups belong to the same CLPR.

• Make sure to click Apply when creating a new CLPR.

12 Troubleshooting

3 Support and other resources

Contacting HP

For worldwide technical support information, see the HP support website:

http://www.hp.com/support

Before contacting HP, collect the following information:

• Product model names and numbers

• Technical support registration number (if applicable)

• Product serial numbers

• Error messages

• Operating system type and revision level

• Detailed questions

Subscription service

HP recommends that you register your product at the Subscriber's Choice for Business website:

http://www.hp.com/go/e-updates

After registering, you will receive e-mail notification of product enhancements, new driver versions,

firmware updates, and other product resources.

Documentation feedback

HP welcomes your feedback.

To make comments and suggestions about product documentation, please send a message to

storagedocsfeedback@hp.com. Include the document title and manufacturing part number. All

submissions become the property of HP.

Related information

The following documents [and websites] provide related information:

• HP XP P9000 Performance for Open and Mainframe Systems User Guide

• HP XP P9000 Remote Web Console User Guide

You can find these documents on the Manuals page of the HP Business Support Center website:

http://www.hp.com/support/manuals

In the Storage section, click Disk Storage Systems for hardware or Storage Software for software,

and then select your product.

HP websites

For additional information, see the following HP websites:

• http://www.hp.com

• http://www.hp.com/go/storage

• http://www.hp.com/service_locator

• http://www.hp.com/support/manuals

Contacting HP 13

• http://www.hp.com/support/downloads

• http://www.hp.com/storage/whitepapers

Conventions for storage capacity values

HP XP P9000 disk arrays use the following values to calculate physical storage capacity values

(hard disk drives):

• 1 KB (kilobyte) = 1,000 bytes

• 1 MB (megabyte) = 1,000

bytes

• 1 GB (gigabyte) = 1,000

bytes

• 1 TB (terabyte) = 1,000

bytes

• 1 PB (petabyte) = 1,000

bytes

• 1 EB (exabyte) = 1,000

bytes

HP XP P9000 disk arrays use the following values to calculate logical storage capacity values

(logical devices):

• 1 KB (kilobyte) = 1,024 bytes

• 1 MB (megabyte) = 1,024

bytes

• 1 GB (gigabyte) = 1,024

bytes

• 1 TB (terabyte) = 1,024

bytes

• 1 PB (petabyte) = 1,024

bytes

• 1 EB (exabyte) = 1,024

bytes

Typographic conventions

Table 2 Document conventions

ElementConvention

Cross-reference linksBlue text: Table 2 (page 14)

email addressesBlue, bold, underlined text

Website addressesBlue, underlined text: http://www.hp.com

Bold text

• Keys that are pressed

• Text typed into a GUI element, such as a box

• GUI elements that are clicked or selected, such as menu

and list items, buttons, tabs, and check boxes

Text emphasisItalic text

Monospace text

• File and directory names

• System output

• Code

• Commands, their arguments, and argument values

Monospace, italic text

• Code variables

• Command variables

Emphasized monospace textMonospace, bold text

WARNING! Indicates that failure to follow directions could result in bodily harm or death.

14 Support and other resources

CAUTION: Indicates that failure to follow directions could result in damage to equipment or data.

IMPORTANT: Provides clarifying information or specific instructions.

NOTE: Provides additional information.

TIP: Provides helpful hints and shortcuts.

Typographic conventions 15

A Cache Partition GUI reference

This topic describes the windows that comprise the Cache Partition GUI.

Partition Definition tab (Storage System selected)

Use this tab to view detail about all of the cache logical partitions in the storage system. Information

appearing in this tab differs depending on what is selected in the Logical Partition tree.

• When Storage System is selected, information about the selected storage system appears in

the resource list.

• When CLPR is selected, information about cache partition appears in the resource list.

• When a specific CLPR is selected, information about that CLPR appears in the resource list,

and the CLPR detail appears below the list.

To access this tab, from the Remote Web Console main window click Go, then Environmental

Setting, and then select the Partition Definition tab.

DescriptionItem

A hierarchical list of storage system and cache logical partitions. CLPRs defined in the storage

system are indicated by an icon and a unique CLPR number.

Logical Partition tree

Provides information about the item selected in the Logical Partition tree. When Storage System

is selected, the resource list provides the following information:

Resource list

• No.: The storage system resource list number.

• Item: The resource type, for example, Storage Partition.

• Cache (Num. of CLPRs): The cache capacity, in GM, and number of cache logical partitions.

• Num. of Resources: Number of parity groups.

See also:

• “Partition Definition tab, Cache Logical Partition window (CLPR selected)” (page 17)

• “Partition Definition tab, Cache Logical Partition window (each CLPR information)” (page 17)

Implements the Storage System settings made in this window.Apply

Cancels any settings that were made in this window.Cancel

16 Cache Partition GUI reference

Partition Definition tab, Cache Logical Partition window (CLPR selected)

Use this window to view information about all of the cache logical partitions in the storage system.

This window opens when you select a CLPR in the Partition Definition tree of the Partition Definition

tab.

DescriptionItem

A hierarchical list of the cache logical partitions in the selected storage system. The CLPR

identifier, for example CLPR0, appears to the right of the CLPR icon ( ).

Partition Definition

tree

Information about the CLPR. When a CLPR is selected, the list provides the following information:Cache Logical

Partition resource list

• No.: Line number.

• Resource Type: Resource type, for example, Cache Partition or Port.

• Name: Resource name. If the resource type is Cache Partition, the CLPR number and CLPR

ID appear.

• Properties: Capacity, in GB, and number of resources allocated to the selected CLPR.

• Information: Status of the selected CLPR. When the CLPR is created, Create appears. When

the CLPR is deleted, Delete appears.

Implements settings made in this window.Apply

Cancels any settings made in this window.Cancel

Partition Definition tab, Cache Logical Partition window (each CLPR

information)

The Cache Logical Partition window appears below the resource list when you select a specific

CLPR in the Partition Definition tree of the Partition Definition tab. Use this window to view and

update CLPR resources. Parity groups, external volume groups, virtual volumes, the cache size, the

Cache Residency size and the number of Cache Residency areas are configured to CLPR.

Before changing cache size or cache residency size, verify that CLPR0 has at least 4 GB remaining

after subtracting cache residency size from the cache size.

Partition Definition tab, Cache Logical Partition window (CLPR selected) 17

DescriptionItem

Indicates either All CUs or the selected CU number.CU

Opens the Select CU dialog box.Select CU

A hierarchical list of all of the cache logical partitions in the storage system. The cache logical

partition number and name appear to the right of the CLPR icon ( ).

Partition Definition

tree

When a CLPR is selected in the Partition Definition tree, the Cache Logical Partition resource list

show the resource information for the selected CU and CLPR.

Cache Logical

Partition resource list

When CLPR0 is selected in the Cache Logical Partition tree, this list shows all resources not

already assigned to other partitions.

The resource list provides the following information:

• No.: Row number.

• Resource Type: Type of CLPR resources. Parity Group or V-VOL appears in this column.

• Address: Resource address.

An address with E (for example, E1-1) indicates that the parity group contains external

volumes.

An address with M (for example, M1-1) indicates that the parity group contains migration

volumes.

An address with V (for example, V1-1) indicates that the parity group contains Snapshot

virtual volumes.

An address with X (for example, X1-1) indicates that the parity group contains Thin

Provisioning virtual volumes.

An address with [1-1(Couple)] indicates that parity group 1-1 is connected to another parity

group and the top parity group is 1-1.

An address with [1-2(1-1)] indicates that parity group 1-2 is connected to another parity

group and the top parity group is 1-1.

• Properties: Properties of the parity group.

If a parity group contains internal volumes, the parity group and RAID configuration are

shown.

If a parity group contains external volumes, the volume capacity is shown, but the RAID

configuration is not shown.

18 Cache Partition GUI reference

DescriptionItem

For virtual volumes (for example, Snapshot or Thin Provisioning), the logical volume capacity

is shown, but the RAID configuration is not shown.

• Emulation: Emulation type of the resource.

When a CLPR is selected in the Partition Definition tree, the CLPR detail appears below the

resource list. Use this area to set or change the settings of the specified cache logical partition.

Detail For CLPR in

Storage System

You cannot directly change the capacity value of CLPR0. Any changes in the capacity of the

other CLPRs are reflected as an opposite change in the capacity of CLPR0.

The maximum available cache capacity (installed cache capacity less the cache assigned to

other cache logical partitions) is shown for the upper limit of Cache Size, Cache Residency

Size, and Num. of Cache Residency Areas. For more information on cache residency, see the

HP XP P9000 Performance for Open and Mainframe Systems User Guide.

• CLPR Name: Allows you to set or change the name of the cache logical partition, provided

that it is within the selected CU. You can use up to 16 alphanumeric characters.

• Cache Size: Allows you to set or change the cache capacity of each cache logical partition.

You may select 4 GB or more up to a maximum size of 508 GB, which is 4 GB smaller than

the cache size of the whole storage system. From a default value of 4 GB you may increase

the size in 2 GB increments.

• Cache Residency Size: Allows you to set or change the capacity of the Cache Residency

cache. You may select nothing (0 GB) to a maximum of 504 GB, which is the Cache

Residency size of the entire storage system. The default value is 0 GB to which you may add

capacity in 0.5 GB increments.

If you have previously defined cache residency size for this cache logical partition using

Cache Residency, the cache residency size selected for this cache logical partition must be

greater than that which was previously defined. Use Cache Residency to verify the size before

you set the value for this field.

• Num. of Cache Residency Areas: Allows you to set or change the number of cache residency

areas, from 0 to 16,384. The default value is zero (0).

If you have previously defined cache residency areas for this cache logical partition using

Cache Residency, the number of cache residency areas selected for this cache logical partition

must be more than that which was previously defined. Use Cache Residency to verify the

number of areas before you set the value for this field.

Implements settings made in this window.Apply

Cancels settings made in this window.Cancel

Select CU dialog box

Use this dialog box to select how you want CU information to appear on the CLPR resource list.

Open the Select CU Dialog box by clicking Select CU on the Cache Logical Partition Window.

Select CU dialog box 19

DescriptionItem

When selected, only information about resources of all CUs appears on the CLPR resource list.All CUs

When selected, only information about resources that are associated with the specified CU

appears on the CLPR resource list.

Specific CU

• Use the LDKC list to specify LDKC.

• Use the CU list to specify CU.

When selected, only information about resources that are not assigned with any CU appears

on the CLPR resource list.

Unallocated

Implements the settings in the storage system.Set

Cancels any settings made in this window.Cancel

20 Cache Partition GUI reference

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HP XP 9000 User manual

HP XP 9000 User manual

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