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HP StorageWorks P9000 User Manual

Cache partition user guide
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HP StorageWorks
P9000 Cache Partition User Guide
Abstract
This guide describes how to use the HP StorageWorks P9000 Cache Partition Software on HP StorageWorks P9000 disk
arrays. The intended audience is a storage administrator or authorized service provider with independent knowledge of HP
StorageWorks P9000 disk arrays and P9000 software.
HP Part Number: AV400-96360
Published: May 201 1
Edition: Fourth

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Summary of Contents for HP StorageWorks P9000

  • Page 1 P9000 Cache Partition User Guide Abstract This guide describes how to use the HP StorageWorks P9000 Cache Partition Software on HP StorageWorks P9000 disk arrays. The intended audience is a storage administrator or authorized service provider with independent knowledge of HP StorageWorks P9000 disk arrays and P9000 software.
  • Page 2 © Copyright 2010, 201 1 Hewlett-Packard Development Company, L.P. Confidential computer software. Valid license from HP required for possession, use or copying. Consistent with FAR 12.21 1 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.

  • Page 3: Table Of Contents

    Contents 1 Creating virtual cache partitions..............4 Resources that can be executed for each function................4 About virtual cache partitions.....................4 Cache capacity for a CLPR....................5 Cache partitioning rules and guidelines..................6 Partitioning cache........................7 Cache partition work flows....................7 Creating a CLPR........................7 Migrating resources to and from a CLPR..................8 Deleting a CLPR ........................9 2 Troubleshooting..................10 Troubleshooting Cache Partition....................10...

  • Page 4: Creating Virtual Cache Partitions

    1 Creating virtual cache partitions Unless otherwise specified, the term P9000 in this guide refers to the following disk array: P9500 Disk Array The GUI illustrations in this guide were created using a Windows computer with the Internet Explorer browser. Actual windows may differ depending on the operating system and browser used. GUI contents also vary with licensed program products, storage system models, and firmware versions.

  • Page 5: Cache Capacity For A Clpr

    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 partitioning cache memory into CLPRs, calculate how much cache capacity will be needed on your storage system, and then install any needed additional cache memory.

  • Page 6: Cache Partitioning Rules And Guidelines

    HP Technical Support. After installing and partitioning cache memory in one or more CLPRs, you may want to use Cache Residency software to manage your cache. For more information, see the HP StorageWorks P9000 Performance for Open and Mainframe Systems User Guide.

  • Page 7: Partitioning Cache

    A parity group containing LDEVs assigned to Cache Residency cache extents (cache areas) cannot be migrated to another CLPR. See the HP StorageWorks 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.

  • Page 8: Migrating Resources To And From A Clpr

    Select the newly created CLPR to open the Cache Logical Partition window. In the Detail for CLPR Subsystem section, do the following: In CLPR Name, type the name of the cache logical partition, in up to 16 alphanumeric characters. In Cache Size, select the cache capacity. You may select from 4 to 508 GB, in 2 GB increments.

  • Page 9: Deleting A Clpr

    To migrate resources to and from a CLPR: Click Settings > Environmental Setting > Partition Definition on the menu bar of the Remote Web Console main window. Click to change the mode from View to Modify. Access the Logical Partition window, then select a CLPR from the Partition Definition tree. In the Cache Logical Partition window, click Select CU to choose a CU.

  • Page 10: Troubleshooting

    2 Troubleshooting This chapter describes some troubleshooting methods to use if you have problems creating a CLPR with Cache Partition. Troubleshooting Cache Partition Displaying an error message If the settings are wrong after you click Apply, an error message appears. After closing the message, you can see the error detail.

  • Page 11: Support And Other Resources

    Related information The following documents [and websites] provide related information: HP StorageWorks P9000 Performance for Open and Mainframe Systems User Guide HP StorageWorks 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...

  • Page 12: Conventions For Storage Capacity Values

    Conventions for storage capacity values 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 13 WARNING! Indicates that failure to follow directions could result in bodily harm or death. 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.

  • Page 14: A Cache Partition Gui Reference

    A Cache Partition GUI reference This appendix describes the windows of the Cache Partition GUI. Partition Definition tab (Subsystem 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 Subsystem is selected, information about the selected storage system appears in the resource list.

  • Page 15: 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 16 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 17: Select Cu Dialog Box

    Size, and Num. of Cache Residency Areas. For more information on cache residency, see the HP StorageWorks 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 18 Item Description All CUs When selected, 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. Use the CU list to specify CU.

  • Page 19: Glossary

    Glossary 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 P9000 or XP Continuous Access Journal software. Cnt Ac-J Z The version of Continuous Access Journal that supports mainframe volumes.

  • Page 20: Index

    Index Business Copy storage capacity values restrictions on quick restore operations across multiple conventions, CLPRs, Subscriber's Choice, HP, symbols in text, cache capacity recommendations, technical support partitioning example, CLPR service locator website, creating, text symbols, CLPRs troubleshooting CLPRs, deleting, typographic conventions, migrating resources, restrictions, contacting HP,...

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