{"product_id":"beyond-redundancy-how-geographic-redundancy-can-improve-service-availability-and-reliability-of-computer-based-systems-hardback-9781118038291","title":"Beyond Redundancy; How Geographic Redundancy Can Improve Service Availability and Reliability of Computer-Based Systems (Hardback) 9781118038291","description":"\u003cfont face=\"Georgia\"\u003e\r\n\u003cp\u003e\u003cfont size=\"6\"\u003eBeyond Redundancy\u003c\/font\u003e\u003cbr\u003e\r\n\u003cfont size=\"5\"\u003eHow Geographic Redundancy Can Improve Service Availability and Reliability of Computer-Based Systems\u003c\/font\u003e\u003c\/p\u003e\r\n\r\n\r\n\r\n\r\n\u003cp\u003e\u003cfont size=\"4\"\u003eEric Bauer (Author), Randee Adams (Author), Daniel Eustace (Author)\u003c\/font\u003e\u003c\/p\u003e\r\n\r\n\u003cp\u003e\u003cfont size=\"3\"\u003e9781118038291, Wiley\u003c\/font\u003e\u003c\/p\u003e\r\n\r\n\u003cp\u003e\u003cfont size=\"3\"\u003eHardback, published 2 December 2011\u003c\/font\u003e\u003c\/p\u003e\r\n\r\n\u003cp\u003e\u003cfont size=\"3\"\u003e330 pages, Photos: 55 B\u0026amp;W, 0 Color; Drawings: 50 B\u0026amp;W, 0 Color\u003cbr\u003e24.3 x 16.5 x 2.2 cm, 0.612 kg\u003c\/font\u003e\u003c\/p\u003e\r\n\r\n\r\n\r\n\r\n\r\n\u003cp align=\"justify\"\u003e\u003cstrong\u003e\u003cfont size=\"3\"\u003eWhile geographic redundancy can obviously be a huge benefit for disaster recovery, it is far less obvious what benefit is feasible and likely for more typical non-catastrophic hardware, software, and human failures. \u003ci\u003eGeoredundancy and Service Availability\u003c\/i\u003e provides both a theoretical and practical treatment of the feasible and likely benefits of geographic redundancy for both service availability and service reliability. The text provides network\/system planners, IS\/IT operations folks, system architects, system engineers, developers, testers, and other industry practitioners with a general discussion about the capital expense\/operating expense tradeoff that frames system redundancy and georedundancy.\u003c\/font\u003e\u003c\/strong\u003e\u003c\/p\u003e\r\n\r\n\u003cp\u003e\u003cfont size=\"3\"\u003e\u003cb\u003eFigures xv\u003c\/b\u003e  \u003cp\u003e\u003cb\u003eTables xix\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003e\u003cb\u003eEquations xxi\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003e\u003cb\u003ePreface and Acknowledgments xxiii\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003eAudience xxiv\u003c\/p\u003e \u003cp\u003eOrganization xxiv\u003c\/p\u003e \u003cp\u003eAcknowledgments xxvi\u003c\/p\u003e \u003cp\u003e\u003cb\u003ePART 1 BASICS 1\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003e\u003cb\u003e1 SERVICE, RISK, AND BUSINESS CONTINUITY 3\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003e1.1 Service Criticality and Availability Expectations 3\u003c\/p\u003e \u003cp\u003e1.2 The Eight-Ingredient Model 4\u003c\/p\u003e \u003cp\u003e1.3 Catastrophic Failures and Geographic Redundancy 7\u003c\/p\u003e \u003cp\u003e1.4 Geographically Separated Recovery Site 11\u003c\/p\u003e \u003cp\u003e1.5 Managing Risk 12\u003c\/p\u003e \u003cp\u003e1.6 Business Continuity Planning 14\u003c\/p\u003e \u003cp\u003e1.7 Disaster Recovery Planning 15\u003c\/p\u003e \u003cp\u003e1.8 Human Factors 17\u003c\/p\u003e \u003cp\u003e1.9 Recovery Objectives 17\u003c\/p\u003e \u003cp\u003e1.10 Disaster Recovery Strategies 18\u003c\/p\u003e \u003cp\u003e\u003cb\u003e2 SERVICE AVAILABILITY AND SERVICE RELIABILITY 20\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003e2.1 Availability and Reliability 20\u003c\/p\u003e \u003cp\u003e2.2 Measuring Service Availability 25\u003c\/p\u003e \u003cp\u003e2.3 Measuring Service Reliability 33\u003c\/p\u003e \u003cp\u003e\u003cb\u003ePART 2 MODELING AND ANALYSIS OF REDUNDANCY 35\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003e\u003cb\u003e3 UNDERSTANDING REDUNDANCY 37\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003e3.1 Types of Redundancy 37\u003c\/p\u003e \u003cp\u003e3.2 Modeling Availability of Internal Redundancy 44\u003c\/p\u003e \u003cp\u003e3.3 Evaluating High-Availability Mechanisms 52\u003c\/p\u003e \u003cp\u003e\u003cb\u003e4 OVERVIEW OF EXTERNAL REDUNDANCY 59\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003e4.1 Generic External Redundancy Model 59\u003c\/p\u003e \u003cp\u003e4.2 Technical Distinctions between Georedundancy and Co-Located Redundancy 74\u003c\/p\u003e \u003cp\u003e4.3 Manual Graceful Switchover and Switchback 75\u003c\/p\u003e \u003cp\u003e\u003cb\u003e5 EXTERNAL REDUNDANCY STRATEGY OPTIONS 77\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003e5.1 Redundancy Strategies 77\u003c\/p\u003e \u003cp\u003e5.2 Data Recovery Strategies 79\u003c\/p\u003e \u003cp\u003e5.3 External Recovery Strategies 80\u003c\/p\u003e \u003cp\u003e5.4 Manually Controlled Recovery 81\u003c\/p\u003e \u003cp\u003e5.5 System-Driven Recovery 83\u003c\/p\u003e \u003cp\u003e5.6 Client-Initiated Recovery 85\u003c\/p\u003e \u003cp\u003e\u003cb\u003e6 MODELING SERVICE AVAILABILITY WITH EXTERNAL SYSTEM REDUNDANCY 98\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003e6.1 The Simplistic Answer 98\u003c\/p\u003e \u003cp\u003e6.2 Framing Service Availability of Standalone Systems 99\u003c\/p\u003e \u003cp\u003e6.3 Generic Markov Availability Model of Georedundant Recovery 103\u003c\/p\u003e \u003cp\u003e6.4 Solving the Generic Georedundancy Model 115\u003c\/p\u003e \u003cp\u003e6.5 Practical Modeling of Georedundancy 121\u003c\/p\u003e \u003cp\u003e6.6 Estimating Availability Benefit for Planned Activities 130\u003c\/p\u003e \u003cp\u003e6.7 Estimating Availability Benefit for Disasters 131\u003c\/p\u003e \u003cp\u003e\u003cb\u003e7 UNDERSTANDING RECOVERY TIMING PARAMETERS 133\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003e7.1 Detecting Implicit Failures 134\u003c\/p\u003e \u003cp\u003e7.2 Understanding and Optimizing RTO 141\u003c\/p\u003e \u003cp\u003e\u003cb\u003e8 CASE STUDY OF CLIENT-INITIATED RECOVERY 147\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003e8.1 Overview of DNS 147\u003c\/p\u003e \u003cp\u003e8.2 Mapping DNS onto Practical Client-Initiated Recovery Model 148\u003c\/p\u003e \u003cp\u003e8.3 Estimating Input Parameters 154\u003c\/p\u003e \u003cp\u003e8.4 Predicted Results 165\u003c\/p\u003e \u003cp\u003e8.5 Discussion of Predicted Results 172\u003c\/p\u003e \u003cp\u003e\u003cb\u003e9 SOLUTION AND CLUSTER RECOVERY 174\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003e9.1 Understanding Solutions 174\u003c\/p\u003e \u003cp\u003e9.2 Estimating Solution Availability 177\u003c\/p\u003e \u003cp\u003e9.3 Cluster versus Element Recovery 179\u003c\/p\u003e \u003cp\u003e9.4 Element Failure and Cluster Recovery Case Study 182\u003c\/p\u003e \u003cp\u003e9.5 Comparing Element and Cluster Recovery 186\u003c\/p\u003e \u003cp\u003e9.6 Modeling Cluster Recovery 187\u003c\/p\u003e \u003cp\u003e\u003cb\u003ePART 3 RECOMMENDATIONS 201\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003e\u003cb\u003e10 GEOREDUNDANCY STRATEGY 203\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003e10.1 Why Support Multiple Sites? 203\u003c\/p\u003e \u003cp\u003e10.2 Recovery Realms 204\u003c\/p\u003e \u003cp\u003e10.3 Recovery Strategies 206\u003c\/p\u003e \u003cp\u003e10.4 Limp-Along Architectures 207\u003c\/p\u003e \u003cp\u003e10.5 Site Redundancy Options 208\u003c\/p\u003e \u003cp\u003e10.6 Virtualization, Cloud Computing, and Standby Sites 216\u003c\/p\u003e \u003cp\u003e10.7 Recommended Design Methodology 217\u003c\/p\u003e \u003cp\u003e\u003cb\u003e11 MAXIMIZING SERVICE AVAILABILITY VIA GEOREDUNDANCY 219\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003e11.1 Theoretically Optimal External Redundancy 219\u003c\/p\u003e \u003cp\u003e11.2 Practically Optimal Recovery Strategies 220\u003c\/p\u003e \u003cp\u003e11.3 Other Considerations 228\u003c\/p\u003e \u003cp\u003e\u003cb\u003e12 GEOREDUNDANCY REQUIREMENTS 230\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003e12.1 Internal Redundancy Requirements 230\u003c\/p\u003e \u003cp\u003e12.2 External Redundancy Requirements 233\u003c\/p\u003e \u003cp\u003e12.3 Manually Controlled Redundancy Requirements 235\u003c\/p\u003e \u003cp\u003e12.4 Automatic External Recovery Requirements 237\u003c\/p\u003e \u003cp\u003e12.5 Operational Requirements 242\u003c\/p\u003e \u003cp\u003e\u003cb\u003e13 GEOREDUNDANCY TESTING 243\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003e13.1 Georedundancy Testing Strategy 243\u003c\/p\u003e \u003cp\u003e13.2 Test Cases for External Redundancy 246\u003c\/p\u003e \u003cp\u003e13.3 Verifying Georedundancy Requirements 247\u003c\/p\u003e \u003cp\u003e13.4 Summary 254\u003c\/p\u003e \u003cp\u003e\u003cb\u003e14 SOLUTION GEOREDUNDANCY CASE STUDY 256\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003e14.1 The Hypothetical Solution 256\u003c\/p\u003e \u003cp\u003e14.2 Standalone Solution Analysis 259\u003c\/p\u003e \u003cp\u003e14.3 Georedundant Solution Analysis 263\u003c\/p\u003e \u003cp\u003e14.4 Availability of the Georedundant Solution 269\u003c\/p\u003e \u003cp\u003e14.5 Requirements of Hypothetical Solution 269\u003c\/p\u003e \u003cp\u003e14.6 Testing of Hypothetical Solution 277\u003c\/p\u003e \u003cp\u003e\u003cb\u003eSummary 285\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003e\u003cb\u003eAppendix: Markov Modeling of Service Availability 292\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003e\u003cb\u003eAcronyms 296\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003e\u003cb\u003eReferences 298\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003e\u003cb\u003eAbout the Authors 300\u003c\/b\u003e\u003c\/p\u003e \u003cp\u003e\u003cb\u003eIndex 302\u003c\/b\u003e\u003c\/p\u003e\u003c\/font\u003e\u003c\/p\u003e\r\n\r\n\u003cp\u003e\u003cfont size=\"3\"\u003eSubject Areas: Computer programming \/ software development [\u003ca title=\"See our other books on Computer programming \/ software development\" href=\"https:\/\/freshlyprintedbooks.co.uk\/search?q=%22Computer%20programming%20\/%20software%20development%20%5BUM%5D%22\"\u003eUM\u003c\/a\u003e]\u003c\/font\u003e\u003c\/p\u003e\r\n\r\n\r\n\u003c\/font\u003e","brand":"Wiley-IEEE Press","offers":[{"title":"Brand New","offer_id":52417749352728,"sku":"9781118038291","price":79.97,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0730\/2037\/5320\/files\/9781118038291.jpg?v=1784506406","url":"https:\/\/freshlyprintedbooks.co.uk\/products\/beyond-redundancy-how-geographic-redundancy-can-improve-service-availability-and-reliability-of-computer-based-systems-hardback-9781118038291","provider":"Freshly Printed Books","version":"1.0","type":"link"}