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VSI Openvms Cluster Systems Describe System Management for Openvms Cluster Systems

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VSI Openvms Cluster Systems Describe System Management for Openvms Cluster Systems VSI OpenVMS Cluster Systems Document Number: DO-DCLUSY-01A Publication Date: August 2019 This manual describes cluster concepts, procedures, and guidelines for configuring and managing OpenVMS Cluster systems. Except where noted, the procedures and guidelines apply equally to Integrity servers and Alpha systems. This manual also in- cludes information for providing high availability, building-block growth, and unified system management across coupled systems. Revision Update Information: This is a new manual. Operating System and Version: VSI OpenVMS I64 Version 8.4-1H1 VSI OpenVMS Alpha 8.4-2L1 VMS Software, Inc. (VSI) Bolton, Massachusetts, USA Cluster Systems: Copyright © 2018 VMS Software, Inc., (VSI), Bolton Massachusetts, USA Legal Notice Confidential computer software. Valid license from VSI required for possession, use or copying. Consistent with FAR 12.211 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. The information contained herein is subject to change without notice. The only warranties for VSI 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. VSI shall not be liable for technical or editorial errors or omissions contained herein. HPE, HPE Integrity, HPE Alpha, and HPE Proliant are trademarks or registered trademarks of Hewlett Packard Enterprise. The VSI OpenVMS documentation set is available on DVD. ii Cluster Systems Preface ................................................................................................................................... xv 1. About VSI .................................................................................................................... xv 2. Introduction .................................................................................................................. xv 3. Who Should Use This Manual ....................................................................................... xv 4. How This Manual Is Organized ..................................................................................... xv 5. Related Documents ...................................................................................................... xvi 6. VSI Encourages Your Comments ................................................................................. xvii 7. How to Order Additional Documentation ..................................................................... xvii 8. Conventions ................................................................................................................ xvii Chapter 1. Introduction to OpenVMS Cluster System Management .............................. 1 1.1. Overview ..................................................................................................................... 1 1.1.1. Uses .................................................................................................................. 1 1.1.2. Benefits ............................................................................................................ 1 1.2. Hardware Components ................................................................................................. 2 1.2.1. Computers ......................................................................................................... 2 1.2.2. Physical Interconnects ....................................................................................... 2 1.2.3. OpenVMS Galaxy SMCI ................................................................................... 3 1.2.4. Storage Devices ................................................................................................ 4 1.3. Software Components ................................................................................................... 5 1.3.1. OpenVMS Cluster Software Functions ............................................................... 5 1.4. Communications .......................................................................................................... 5 1.4.1. System Communications .................................................................................... 6 1.4.2. Application Communications ............................................................................. 7 1.4.3. Cluster Alias ..................................................................................................... 7 1.4.4. fail SAFE IP ..................................................................................................... 8 1.5. System Management .................................................................................................... 8 1.5.1. Ease of Management ......................................................................................... 8 1.5.2. Tools and Utilities ............................................................................................. 9 1.5.3. System Management Tools from OpenVMS Partners ......................................... 12 1.5.4. Other Configuration Aids ................................................................................. 12 Chapter 2. OpenVMS Cluster Concepts ........................................................................... 13 2.1. OpenVMS Cluster System Architecture ....................................................................... 13 2.1.1. Port Layer ....................................................................................................... 14 2.1.2. SCS Layer ....................................................................................................... 15 2.1.3. System Applications (SYSAPs) Layer .............................................................. 16 2.1.4. Other Layered Components .............................................................................. 16 2.2. OpenVMS Cluster Software Functions ........................................................................ 16 2.2.1. Functions ........................................................................................................ 16 2.3. Ensuring the Integrity of Cluster Membership .............................................................. 17 2.3.1. Connection Manager ........................................................................................ 17 2.3.2. Cluster Partitioning .......................................................................................... 17 2.3.3. Quorum Algorithm .......................................................................................... 17 2.3.4. System Parameters ........................................................................................... 18 2.3.5. Calculating Cluster Votes ................................................................................. 18 2.3.6. Example .......................................................................................................... 19 2.3.7. Sub-Cluster Selection ....................................................................................... 19 2.3.8. Quorum Disk .................................................................................................. 19 2.3.9. Quorum Disk Watcher ..................................................................................... 20 2.3.10. Rules for Specifying Quorum ......................................................................... 21 2.4. State Transitions ......................................................................................................... 21 2.4.1. Adding a Member ........................................................................................... 21 iii Cluster Systems 2.4.2. Losing a Member ............................................................................................ 22 2.5. OpenVMS Cluster Membership .................................................................................. 24 2.5.1. Cluster Group Number ..................................................................................... 24 2.5.2. Cluster Password ............................................................................................. 24 2.5.3. Location .......................................................................................................... 25 2.5.4. Example .......................................................................................................... 25 2.6. Synchronizing Cluster Functions by the Distributed Lock Manager ............................... 26 2.6.1. Distributed Lock Manager Functions ................................................................ 26 2.6.2. System Management of the Lock Manager ........................................................ 26 2.6.3. Large-Scale Locking Applications .................................................................... 27 2.7. Resource Sharing ....................................................................................................... 28 2.7.1. Distributed File System .................................................................................... 28 2.7.2. RMS and the Distributed Lock Manager ........................................................... 28 2.8. Disk Availability ........................................................................................................ 28 2.8.1. MSCP Server .................................................................................................. 28 2.8.2. Device Serving
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