Clusters for High Availability
Prentice Hall (Verlag)
978-0-13-494758-7 (ISBN)
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49475-7 UNIX(r) computer systems are increasingly used for mission-critical applications, data processing organizations are required to provide high levels of availability for these systems and to ensure they maintain the required level of availability over time. Among the most reliable, cost-effective ways to deliver high availability is to use clusters-loosely coupled UNIX computers, each with its own processors, memory, operating system and storage, bound together by special system processes. Clusters for High Availability explains the basic concepts, architectures and terminology of high availability using clusters, and gives a broad outline of how Hewlett-Packard's industry-leading cluster solutions work. The book describes how high-availability clusters can be configured to eliminate single points of failure in power systems, disks, processors, network components, and software. The book features coverage of HP high-availability products, including MC/ServiceGuard, MC/LockManager, mirrored disks and disk arrays, journaled file systems, management tools, and consulting services.
Finally, Clusters for High Availability presents suggestions for developing high availability solutions in areas as diverse as publishing, mail order catalog sales, brokerage services, and insurance.
1. Basic High Availability Concepts. What is High Availability? Available. Highly Available. Highly Available Computing. Service Levels. Continuous Availability. Fault Tolerance. Matching Availability to User Needs. Choosing a Solution. High Availability as a Business Requirement. High Availability as Insurance. High Availability as Opportunity. Cost of High Availability. What Are the Measures of High Availability? Calculating Availability. Expected Period of Operation. Calculating Mean Time Between Failures. Understanding the Obstacles to High Availability. Duration of Outages. Time Lines for Outages. Causes of Planned Downtime. Causes of Unplanned Downtime. Severity of Unplanned Outages. Designing for Reaction to Failure. Identifying Points of Failure. Preparing Your Organization for High Availability. Stating Availability Goals. Building the Appropriate Physical Environment. Creating Automated Processes. Using a Development and Test Environment. Maintaining a Stock of Spare Parts. Defining an Escalation Process. Planning for Disasters. Training System Administration Staff. Using Dry Runs. Documenting Every Detail. The Starting Point for a Highly Available System. Basic Hardware Reliability. Software Quality. Intelligent Diagnostics. Comprehensive System Management Tools. Maintenance and Support Services. Moving to High Availability. Summary. 2. Creating a High Availability Cluster. Identifying Single Points of Failure in a Stand-alone System. Eliminating Power Sources as Single Points of Failure. Individual UPS Units. Power Passthrough UPS Units. Eliminating Disks as Single Points of Failure. Data Protection with Disk Arrays. Data Protection with Software Mirroring. Eliminating the SPU as a Single Point of Failure. Eliminating Single Points of Failure in Networks. Points of Failure in Client Connectivity. Examples of Points of Failure. Points of Failure in Inter- Node Communication. Eliminating the Failure Points. Providing Redundant LAN Connections. Configuring Local Switching of LAN Interfaces. Providing Redundant FDDI Connections. Using Dual Attached FDDI. Redundancy for Dialup Lines, Hardwired Serial Connections and X.25. Eliminating Software as a Single Point of Failure. Tailoring Applications for Cluster Use. Implementing the High Availability Cluster. Complete High Availability Solution. 3. HPs High Availability Cluster. Components. Choosing HA Architectures and Cluster Components. Active/Standby Configurations Using MC/ServiceGuard. Active/Active Configurations Using MC/ServiceGuard. How MC/ServiceGuard Works. Parallel Database Configuration. Using MC/LockManager. Oracle Parallel Server. How MC/LockManager Works with OPS. Selecting Other HA Subsystems. MirrorDisk/UX. High Availability Disk Storage Enclosure. High Availability Disk Arrays. EMC Disk Arrays. Journaled File System. OnLineJFS. Transaction Processing Monitors. Uninterruptible Power Supplies. System and Network Management Tools. Using Mission Critical Consulting and Support Services. Availability Management Service. Business Continuity Support. Business Recovery Services. 4. Sample High Availability Solutions. Highly Available NFS System for Publishing. High Availability Software and Packages. Hardware Configuration. Responses to Failures. Stock Quotation Service. High Availability Software and Packages. Hardware Configuration. Responses to Failures. Order Entry and Catalog Application. High Availability Software and Packages. Hardware Configuration. Responses to Failures. Insurance Company Database. Two-Node OPS Configuration. 5. Glossary of High Availability. Terminology. AdminCenter. Adoptive Node. ADT. AFR. Alternate Node. Annualized Failure Rate. Architecture for HA. Availability. Average Downtime. Cluster. ClusterView. Continuous Availability. Custody. Downtime. Failure. Failover. Fault Tolerance. Grouped Net. Hardware Mirroring. Highly Available. Hot Plug Capability. Hot Swap Capability. LAN. LAN interface. Logical Volume Manager. MC/LockManager. MC/ServiceGuard. Mean Time Between Failures. Mean Time to Repair. MirrorDisk/UX. Mirroring. MTBF. MTTR. Network Node Manager. Node. OpenView. OperationsCenter. Planned Downtime. Primary Node. Package. Process Resource Manager. RAID. Redundancy. Reliability. Relocatable IP Address. Service. Service Level Agreement. Shared Logical Volume Manager. Single Point of Failure. SLVM. Software Mirroring. SPOF. SPU. Subnet. SwitchOver/UX. System Processor Unit. Transfer of Packages. Unplanned Downtime. Volume Group. Index.
| Erscheint lt. Verlag | 1.7.1996 |
|---|---|
| Verlagsort | Upper Saddle River |
| Sprache | englisch |
| Maße | 138 x 210 mm |
| Gewicht | 201 g |
| Themenwelt | Informatik ► Betriebssysteme / Server ► Unix / Linux |
| Mathematik / Informatik ► Informatik ► Theorie / Studium | |
| ISBN-10 | 0-13-494758-4 / 0134947584 |
| ISBN-13 | 978-0-13-494758-7 / 9780134947587 |
| Zustand | Neuware |
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