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HP XP 9000 User Manual

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HP
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

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Summary of Contents for HP XP 9000

  • Page 1 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.
  • Page 2 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.

  • Page 3: Table Of Contents

    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...

  • Page 4: Creating Virtual Cache Partitions

    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.
  • Page 5 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) ×...
  • Page 6 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.

  • Page 7: Cache Partitioning Rules And Guidelines

    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.
  • Page 8 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.

  • Page 9: Partitioning Cache

    CLPR number CLPR name CLPR number CLPR name CLPR14 CLPR30 CLPR15 CLPR31 Partitioning cache Cache partition work flows Creating a CLPR Create a CLPR (see “Creating a CLPR” (page 9)). Migrate resources to the new CLPR (see “Migrating resources to and from a CLPR” (page 10)).

  • Page 10: Migrating Resources To And From A Clpr

    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.

  • Page 11: Deleting A Clpr

    Click Set to close the dialog box. From the Cache Logical Partition Resource List, select one or more parity groups to be migrated, then select Cut. On the Partition Definition tree, right-click the CLPR to which you want to migrate resources, and then select Paste Resources.

  • Page 12: Troubleshooting

    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: Right-click a CLPR on the Partition Definition tree, then select Error Detail to open the message. Review the message and click OK to close the message.

  • Page 13: Support And Other Resources

    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.

  • Page 14: Conventions For Storage Capacity Values

    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...
  • Page 15 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...

  • Page 16: A Cache Partition Gui Reference

    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.

  • Page 17: Partition Definition Tab, Cache Logical Partition Window (Clpr Selected)

    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.
  • Page 18 Item Description Indicates either All CUs or the selected CU number. Select CU Opens the Select CU dialog box. Partition Definition A hierarchical list of all of the cache logical partitions in the storage system. The cache logical tree partition number and name appear to the right of the CLPR icon ( Cache Logical When a CLPR is selected in the Partition Definition tree, the Cache Logical Partition resource list Partition resource list...

  • Page 19: Select Cu Dialog Box

    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.
  • Page 20 Item Description All CUs When selected, only information about resources of all CUs appears on the CLPR resource list. Specific CU When selected, only information about resources that are associated with the specified CU appears on the CLPR resource list. Use the LDKC list to specify LDKC.

  • Page 21: Glossary

    Glossary HP XP P9000 or XP Business Copy. An HP application that provides volume-level, point-in-time copies in the disk array. CLPR Cache logical partition. Cnt Ac-J HP XP P9000 or XP Continuous Access Journal software. Cnt Ac-J Z The version of Continuous Access Journal that supports mainframe volumes.

  • Page 22: Index

    CLPR, websites deleting a CLPR, 9, HP , document HP Subscriber's Choice for Business, conventions, product manuals, related information, documentation HP website, providing feedback, help obtaining, technical support,...

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