IBM Books

Managing Shared Disks


Contents

Figures

Tables

About this book

  • Who should use this book
  • Typographic conventions
  • Chapter 1. Overview of the Managing Shared Disk components of PSSP

  • What's new in this release?
  • IBM Virtual Shared Disk component overview
  • IBM concurrent virtual shared disks
  • IBM Virtual Shared Disk restrictions
  • Hashed Shared Disk component overview
  • Comparing Hashed Shared Disk and LVM striping
  • When to use Hashed Shared Disk
  • Hashed Shared Disk restrictions
  • IBM Recoverable Virtual Shared Disk component overview
  • Virtual Shared Disk recovery with twin-tailed disks
  • IBM Recoverable Virtual Shared Disk restrictions
  • Virtual Shared Disk recovery with concurrent virtual shared disks
  • IBM Virtual Shared Disk Perspective overview
  • The IBM Virtual Shared Disk Perspective primary window
  • The Menu bar
  • The Tool bar
  • The panes
  • The Information Area
  • Overview of Multilink Adapter Support
  • Subsystem Device Driver Overview
  • IBM Virtual Shared Disk Configuration Support for Subsystem Device Driver
  • Chapter 2. Installing the shared disk management components of PSSP

  • Planning to use the shared disk components
  • Planning for IBM Virtual Shared Disk
  • Planning for Hashed Shared Disk
  • Planning for IBM Recoverable Virtual Shared Disk
  • Migrating shared disk components
  • Preparing to migrate
  • Performing the migration install
  • Completing migration after the install
  • Installing shared disk components
  • Preparing to install
  • Performing the install
  • Establishing authorization
  • Authentication system
  • User authorization
  • Chapter 3. Understanding your Managing Shared Disks process

    Chapter 4. Creating and activating virtual shared disks

  • Designating nodes as IBM Virtual Shared Disk nodes
  • Defining global volume groups
  • Creating or defining Virtual Shared Disks or Hashed Shared Disks
  • Checking for old rollback files
  • Creating Virtual Shared Disks
  • Creating Hashed Shared Disks
  • Defining Virtual Shared Disks and Hashed Shared Disks
  • Configuring Virtual Shared Disks or Hashed Shared Disks
  • Enabling and disabling KLAPI
  • Activating Virtual Shared Disks
  • Verifying you can write to a Virtual Shared Disk
  • Adding IBM Recoverable Virtual Shared Disk after Virtual Shared Disks are already in use
  • Chapter 5. Displaying and modifying virtual shared disk information

  • Displaying and modifying information about Virtual Shared Disk nodes
  • Displaying information about concurrent virtual shared disk clusters
  • Displaying information about global volume groups
  • Displaying and modifying information about Virtual Shared Disks
  • Displaying and resetting Virtual Shared Disk statistics
  • Displaying and resetting Virtual Shared Disk device driver statistics
  • Displaying disk resource information
  • Displaying information about Hashed Shared Disks
  • Chapter 6. Managing and monitoring Virtual Shared Disks

  • Controlling the IBM Recoverable Virtual Shared Disk subsystem
  • Changing the states of Virtual Shared Disks
  • Starting a Virtual Shared Disk
  • Preparing a Virtual Shared Disk
  • Resuming a Virtual Shared Disk
  • Suspending a Virtual Shared Disk
  • Stopping a Virtual Shared Disk
  • Changing a Virtual Shared Disk state using actions
  • Changing a Virtual Shared Disk state using commands
  • Monitoring Virtual Shared Disks
  • viewing dynamic attributes
  • Preparing to monitor Virtual Shared Disk statistics
  • Monitoring conditions
  • PCI hot-plug procedures
  • Replacing a server
  • Refreshing the IBM Recoverable Virtual Shared Disk subsystem
  • Making changes to twin-tailed volume groups
  • Making a change to only one side of a twin-tailed volume group
  • Making a change to both sides of a twin-tailed volume group
  • Making a change to both sides of a twin-tailed volume group with the volume group varied off
  • Setting up twin-tailed physical disks
  • Recabling without adding new physical disks
  • Converting twin-tailed virtual shared disks to concurrent virtual shared disks
  • Running Virtual Shared Disk diagnostics
  • Collecting information for problem determination
  • Chapter 7. Unconfiguring and removing virtual shared disks and nodes

  • Stopping Virtual Shared Disk activity
  • Unconfiguring Virtual Shared Disks and Hashed Shared Disks
  • Removing Virtual Shared Disks and Hashed Shared Disks
  • Removing a node from a Virtual Shared Disk configuration
  • Removing a node from a concurrent virtual shared disk configuration
  • Unloading the device driver from the kernel
  • Chapter 8. Performance and tuning considerations for Virtual Shared Disks and Hashed Shared Disks

  • Tuning Virtual Shared Disk performance
  • Tunable parameters related to Virtual Shared Disks
  • Logical Volume Manager (LVM) tuning considerations
  • SP Switch considerations when using the IP protocol for data transmissions
  • SP Switch considerations when using the KLAPI protocol for data transmissions
  • Buffer allocation
  • The cache buffer
  • Maximum I/O request size
  • Tuning Hashed Shared Disk performance
  • Chapter 9. Application programming considerations

  • Application programming considerations for Virtual Shared Disks
  • Data alignment
  • Data integrity
  • IBM Virtual Shared Disk transmission protocol
  • Getting Virtual Shared Disk information with C interfaces
  • Application programming considerations for Hashed Shared Disks
  • Allocating I/O buffers
  • Getting Hashed Shared Disk information with C interfaces
  • Making your application recoverable
  • Preserving data integrity during application recovery
  • Chapter 10. What you need to know about how the IBM Recoverable Virtual Shared Disk component works

  • The recovery subsystems
  • The rvsd subsystem
  • Disk cable and disk adapter failures
  • Communication adapter failures
  • The hc subsystem
  • Startup time
  • IBM Hashed Shared Disk recovery considerations
  • Chapter 11. IOCTL subroutine

  • fence subroutine
  • Purpose
  • Syntax
  • Parameters
  • Description
  • Return values
  • Error values
  • Examples
  • Appendix A. Interface cross-reference

  • Virtual Shared Disk tasks
  • Hashed Shared Disk tasks
  • Summary of commands
  • Appendix B. Single-node command and SMIT interfaces

  • Command and SMIT interfaces for Virtual Shared Disks
  • Entering node information in the SDR for one node
  • Entering global volume group information in the SDR for one node
  • Entering Virtual Shared Disk information in the SDR for one node
  • An Example of defining a Virtual Shared Disk on one node at a time
  • Displaying Virtual Shared Disk information stored in the SDR
  • Listing node information
  • Listing global volume group information
  • Listing defined Virtual Shared Disks
  • Deleting Virtual Shared Disk information from the SDR
  • Managing Virtual Shared Disks
  • Configuring a Virtual Shared Disk
  • Starting a Virtual Shared Disk
  • Preparing a Virtual Shared Disk
  • Resuming a Virtual Shared Disk
  • Suspending a Virtual Shared Disk
  • Stopping a Virtual Shared Disk
  • Unconfiguring a Virtual Shared Disk
  • Displaying managed Virtual Shared Disk characteristics
  • Displaying managed Virtual Shared Disk statistics
  • Displaying Virtual Shared Disk device driver statistics
  • Setting and displaying Virtual Shared Disk device driver operational parameters
  • Testing to verify a Virtual Shared Disk (the Verification Test Suite)
  • Command and SMIT interfaces for Hashed Shared Disks
  • Defining Hashed Shared Disk device driver information in the SDR
  • An example of creating a Hashed Shared Disk
  • Displaying data striping device information in the SDR
  • Undefining Hashed Shared Disk information in the SDR
  • Managing data striping devices
  • Verifying data striping device installation
  • Management and usage notes
  • Command and SMIT interfaces for the IBM Recoverable Virtual Shared Disk software
  • Defining twin-tailed LVM components in the Recoverable Virtual Shared Disk environment
  • Coordinating the Recoverable Virtual Shared Disk environment
  • Overview of shared volume groups administrative tasks
  • Prerequisite tasks
  • Maintaining twin-tailed volume groups
  • Creating a twin-tailed volume group
  • Adding physical volumes to a twin-tailed volume group
  • Adding or removing logical volumes to or from a twin-tailed volume group
  • Reducing a twin-tailed volume group
  • Removing a twin-tailed volume group
  • Appendix C. Setting up 7134 disks as twin-tailed volume groups

    Notices

  • Trademarks
  • Publicly available software
  • Bibliography

  • Information formats
  • Finding documentation on the World Wide Web
  • Accessing PSSP documentation online
  • Manual pages for public code
  • RS/6000 SP planning publications
  • RS/6000 SP hardware publications
  • RS/6000 SP Switch Router publications
  • Related hardware publications
  • RS/6000 SP software publications
  • AIX publications
  • DCE publications
  • Redbooks
  • Non-IBM publications
  • Glossary of Terms and Abbreviations

    Index


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