| Chapter 9 |
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9
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Configuring OpenVMS Clusters for Scalability
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9.1
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What Is Scalability?
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9.1.1
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Scalable Dimensions
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9.2
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Strategies for Configuring a Highly Scalable OpenVMS Cluster
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9.2.1
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Scalability Strategies
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9.2.2
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Three-Node Fast-Wide SCSI Cluster
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9.2.3
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Four-Node Ultra SCSI Hub Configuration
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9.3
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Scalability in OpenVMS Clusters with Satellites
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9.3.1
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Six-Satellite OpenVMS Cluster
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9.3.2
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Six-Satellite OpenVMS Cluster with Two Boot Nodes
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9.3.3
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Twelve-Satellite LAN OpenVMS Cluster with Two LAN Segments
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9.3.4
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Forty-Five Satellite OpenVMS Cluster with Intersite Link
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9.3.5
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High-Powered Workstation OpenVMS Cluster (1995 Technology)
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9.3.6
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High-Powered Workstation OpenVMS Cluster (2004 Technology)
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9.3.7
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Guidelines for OpenVMS Clusters with Satellites
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9.3.8
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Extended LAN Configuration Guidelines
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9.3.9
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System Parameters for OpenVMS Clusters
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9.4
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Scalability in a Cluster over IP
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9.4.1
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Multiple node IP based Cluster System
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9.4.2
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Guidelines for Configuring IP based Cluster
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9.5
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Scaling for I/Os
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9.5.1
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MSCP Served Access to Storage
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9.5.2
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Disk Technologies
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9.5.3
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Read/Write Ratio
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9.5.4
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I/O Size
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9.5.5
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Caches
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9.5.6
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Managing "Hot" Files
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9.5.7
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Volume Shadowing
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| Chapter 10 |
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10
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OpenVMS Cluster System Management Strategies
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10.1
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Simple and Complex Configurations
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10.2
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System Disk Strategies
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10.2.1
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Single System Disk
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10.2.2
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Multiple System Disks
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10.2.3
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Multiple System-Disk OpenVMS Cluster
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10.2.4
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Dividing an OpenVMS Cluster System
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10.2.5
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Summary: Single Versus Multiple System Disks
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10.3
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OpenVMS Cluster Environment Strategies
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10.3.1
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Common Environment
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10.3.2
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Putting Environment Files on a Separate, Common Disk
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10.3.3
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Multiple Environments
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10.4
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Additional Multiple-Environment Strategies
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10.4.1
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Using Multiple SYSUAF.DAT Files
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10.4.2
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Using Multiple Queue Managers
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10.5
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Quorum Strategies
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10.5.1
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Quorum Strategy Options
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10.6
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State Transition Strategies
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10.6.1
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Dealing with State Transitions
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10.7
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Migration and Warranted Support for Multiple Versions
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| Appendix A |
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Appendix A
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SCSI as an OpenVMS Cluster Interconnect
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A.1
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Conventions Used in This Appendix
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A.1.1
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SCSI ANSI Standard
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A.1.2
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Symbols Used in Figures
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A.2
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Accessing SCSI Storage
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A.2.1
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Single-Host SCSI Access in OpenVMS Cluster Systems
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A.2.2
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Multihost SCSI Access in OpenVMS Cluster Systems
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A.3
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Configuration Requirements and Hardware Support
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A.3.1
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Configuration Requirements
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A.3.2
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Hardware Support
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A.4
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SCSI Interconnect Concepts
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A.4.1
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Number of Devices
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A.4.2
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Performance
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A.4.3
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Distance
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A.4.4
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Cabling and Termination
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A.5
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SCSI OpenVMS Cluster Hardware Configurations
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A.5.1
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Systems Using Add-On SCSI Adapters
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A.5.1.1
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Building a Basic System Using Add-On SCSI Adapters
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A.5.1.2
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Building a System with More Enclosures or Greater Separation or with HSZ Controllers
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A.5.1.3
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Building a System That Uses Differential Host Adapters
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A.6
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Installation
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A.6.1
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Step 1: Meet SCSI Grounding Requirements
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A.6.2
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Step 2: Configure SCSI Node IDs
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A.6.2.1
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Configuring Device IDs on Multihost SCSI Buses
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A.6.2.2
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Configuring Device IDs on Single-Host SCSI Buses
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A.6.3
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Step 3: Power Up and Verify SCSI Devices
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A.6.4
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Step 4: Show and Set SCSI Console Parameters
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A.6.5
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Step 5: Install the OpenVMS Operating System
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A.6.6
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Step 6: Configure Additional Systems
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A.7
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Supplementary Information
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A.7.1
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Running the OpenVMS Cluster Configuration Command Procedure
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A.7.2
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Error Reports and OPCOM Messages in Multihost SCSI Environments
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A.7.2.1
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SCSI Bus Resets
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A.7.2.2
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SCSI Timeouts
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A.7.2.3
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Mount Verify
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A.7.2.4
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Shadow Volume Processing
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A.7.2.5
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Expected OPCOM Messages in Multihost SCSI Environments
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A.7.2.6
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Error Log Basics
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A.7.2.7
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Error Log Entries in Multihost SCSI Environments
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A.7.3
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Restrictions and Known Problems
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A.7.4
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Troubleshooting
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A.7.4.1
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Termination Problems
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A.7.4.2
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Booting or Mounting Failures Caused by Incorrect Configurations
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A.7.4.2.1
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Bugchecks During the Bootstrap Process
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A.7.4.2.2
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Failure to Configure Devices
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A.7.4.2.3
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Mount Failures
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A.7.4.3
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Grounding
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A.7.4.4
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Interconnect Lengths
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A.7.5
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SCSI Arbitration Considerations
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A.7.5.1
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Arbitration Issues in Multiple-Disk Environments
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A.7.5.2
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Solutions for Resolving Arbitration Problems
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A.7.5.3
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Arbitration and Bus Isolators
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A.7.6
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Removal and Insertion of SCSI Devices While the OpenVMS Cluster System is Operating
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A.7.6.1
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Terminology for Describing Hot Plugging
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A.7.6.2
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Rules for Hot Plugging
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A.7.6.3
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Procedures for Ensuring That a Device or Segment is Inactive
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A.7.6.4
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Procedure for Hot Plugging StorageWorks SBB Disks
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A.7.6.5
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Procedure for Hot Plugging HSZxx
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A.7.6.6
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Procedure for Hot Plugging Host Adapters
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A.7.6.7
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Procedure for Hot Plugging DWZZx Controllers
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A.7.7
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OpenVMS Requirements for Devices Used on Multihost SCSI OpenVMS Cluster Systems
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A.7.8
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Grounding Requirements
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