Managing Shared Disks
Figures
Tables
About this book
Chapter 1. Overview of the Managing Shared Disk components of PSSP
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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