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Home > Computing and Information Technology > Computer networking and communications > Virtualization > Essential Virtual SAN (VSAN): Administrator's Guide to VMware Virtual SAN
Essential Virtual SAN (VSAN): Administrator's Guide to VMware Virtual SAN

Essential Virtual SAN (VSAN): Administrator's Guide to VMware Virtual SAN


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About the Book

Understand and implement VMware Virtual SAN: the heart of tomorrow’s Software-Defined Datacenter (SDDC)   VMware’s breakthrough Software-Defined Datacenter (SDDC) initiative can help you virtualize your entire datacenter: compute, storage, networks, and associated services. Central to SDDC is VMware Virtual SAN (VSAN): a fully distributed storage architecture seamlessly integrated into the hypervisor and capable of scaling to meet any enterprise storage requirement.   Now, the leaders of VMware’s wildly popular Virtual SAN previews have written the first authoritative guide to this pivotal technology. You’ll learn what Virtual SAN is, exactly what it offers, how to implement it, and how to maximize its value.   Writing for administrators, consultants, and architects, Cormac Hogan and Duncan Epping show how Virtual SAN implements both object-based storage and a policy platform that simplifies VM storage placement. You’ll learn how Virtual SAN and vSphere work together to dramatically improve resiliency, scale-out storage functionality, and control over QoS.   Both an up-to-the-minute reference and hands-on tutorial, Essential Virtual SAN uses realistic examples to demonstrate Virtual SAN’s most powerful capabilities. You’ll learn how to plan, architect, and deploy Virtual SAN successfully, avoid gotchas, and troubleshoot problems once you’re up and running.   Coverage includes Understanding the key goals and concepts of Software-Defined Storage and Virtual SAN technology Meeting physical and virtual requirements for safe Virtual SAN implementation Installing and configuring Virtual SAN for your unique environment Using Storage Policy Based Management to control availability, performance, and reliability Simplifying deployment with VM Storage Policies Discovering key Virtual SAN architectural details: caching I/O, VASA, witnesses, pass-through RAID, and more Ensuring efficient day-to-day Virtual SAN management and maintenance Interoperating with other VMware features and products Designing and sizing Virtual SAN clusters Troubleshooting, monitoring, and performance optimization      

Table of Contents:
Foreword by Ben Fathi xvii Foreword by Charles Fan xix About the Authors xxi About the Technical Reviewers xxiii Acknowledgments xxv Reader Services xxvii Introduction xxix Chapter 1 Introduction to VSAN 1 Software-Defi ned Datacenter 1 Software-Defi ned Storage 2 Hyper-Convergence/Server SAN Solutions 3 Introducing Virtual SAN 4 What Is Virtual SAN? 5 What Does VSAN Look Like to an Administrator? 8 Summary 11 Chapter 2 VSAN Prerequisites and Requirements for Deployment 13 VMware vSphere 5.5 13   ESXi 5.5 U1 14   ESXi Boot Considerations 14 VSAN Requirements 15   VMware Hardware Compatibility Guide 15   VSAN Ready Nodes 15   Storage Controllers 16   Magnetic Disks 18   Flash Devices 19 Network Requirements 20   Network Interface Cards 20   Supported Virtual Switch Types 21   VMkernel Network 21   VSAN Network Traffi c 22   Jumbo Frames 22   NIC Teaming 23   Network I/O Control 23  Firewall Ports 23 Summary 24 Chapter 3 VSAN Installation and Confi guration 25 VSAN Networking 25 VMkernel Network for VSAN 26 VSAN Network Confi guration: VMware Standard Switch 27 VSAN Network Confi guration: vSphere Distributed Switch 28   Step 1: Create the Distributed Switch 28   Step 2: Create a Distributed Port Group 29   Step 3: Build VMkernel Ports 30 Possible Network Confi guration Issues 33 Network I/O Control Confi guration Example 35 Design Considerations: Distributed Switch and Network I/O Control 38   Scenario 1: Redundant 10GbE Switch Without “Link Aggregation” Capability 39   Scenario 2: Redundant 10GbE Switch with Link Aggregation Capability 42 Creating a VSAN Cluster 45     The Role of Disk Groups 45   Disk Group Maximums 46   Why Confi gure Multiple Disk Groups in VSAN? 46   SSD to Magnetic Disk Ratio 47   Automatically Add Disks to VSAN Disk Groups 48   Handling Is_local or Is_SSD Issues 48   Manually Adding Disks to a VSAN Disk Group 50   Disk Group Creation Example 50   VSAN Datastore Properties 53 Summary 53 Chapter 4 VM Storage Policies on VSAN 55 Introducing Storage Policy-Based Management in a VSAN Environment 56   Number of Failures to Tolerate 58   Number of Disk Stripes Per Object 59   Flash Read Cache Reservation 61   Object Space Reservation 61   Force Provisioning 61 VASA Vendor Provider 62   An Introduction to VASA 62   Storage Providers 63 VSAN Storage Providers: Highly Available 63   Changing VM Storage Policy On-the-Fly 64   Objects, Components, and Witnesses 68 VM Storage Policies 68   Enabling VM Storage Policies 69   Creating VM Storage Policies 70   Assigning a VM Storage Policy During VM Provisioning 70 Summary 71 Chapter 5 Architectural Details 73 Distributed RAID 73 Objects and Components 74   Component Limits 76   Virtual Machine Storage Objects 77   Virtual Machine Home Namespace 77   Virtual Machine Swap 78   VMDKs and Deltas 78   Witnesses and Replicas 79   Object Layout 79 VSAN Software Components 82   Component Management 83   Data Paths for Objects 83   Object Ownership 83   Placement and Migration for Objects 84   Cluster Monitoring, Membership, and Directory Services 85   Host Roles (Master, Slave, Agent) 85   Reliable Datagram Transport 86 On-Disk Formats 86   Flash Devices 86   Magnetic Disks 86 VSAN I/O Flow 87   The Role of the SSD 87   Anatomy of a VSAN Read 88   Anatomy of a VSAN Write 90   Retiring Writes to Magnetic Disks 91   Data Locality 91 Storage Policy-Based Management 92 VSAN Capabilities 92   Number of Failures to Tolerate Policy Setting 93   Best Practice for Number of Failures to Tolerate 95   Stripe Width Policy Setting 96   Striping on VSAN Outside of Policy Setting 98   Stripe Width Maximum 100   Stripe Width Confi guration Error 101   Stripe Width Chunk Size 102   Stripe Width Best Practice 102   Flash Read Cache Reservation Policy Setting 103   Object Space Reservation Policy Setting 103   VM Home Namespace Revisited 104   Swap Revisited 104   How to Examine the VM Swap Storage Object 104   Delta Disk / Snapshot Caveat 106   Verifying How Much Space Is Actually Consumed 106   Force Provisioning Policy Setting 107   Witnesses and Replicas: Failure Scenarios 107   Recovery from Failure 110   What About Stretching VSAN? 113 Summary 115 Chapter 6 VM Storage Policies and Virtual Machine Provisioning 117 Policy Setting: Number of Failures to Tolerate = 1 117 Policy Setting: Failures to Tolerate = 1, Stripe Width = 2 124 Policy Setting: Failures to Tolerate = 2, Stripe Width = 2 128 Policy Setting: Failures to Tolerate = 1, Object Space Reservation = 50 Percent 132 Policy Setting: Failures to Tolerate = 1, Object Space Reservation = 100 Percent 136 Default Policy 138 Summary 141 Chapter 7 Management and Maintenance 143 Host Management 143   Adding Hosts to the Cluster 143   Removing Hosts from the Cluster 145   ESXCLI VSAN Cluster Commands 145 Maintenance Mode 146 Recommended Maintenance Mode Option for Updates and Patching 148 Disk Management 149   Adding a Disk Group 149 Removing a Disk Group 150   Adding Disks to the Disk Group 152   Removing Disks from the Disk Group 153 Wiping a Disk 153   ESXCLI VSAN Disk Commands 154 Failure Scenarios 155   Magnetic Disk Failure 156   Flash Device Failure 157   Host Failure 158   Network Partition 159   Disk Full Scenario 164 Thin Provisioning Considerations 165 vCenter Management 166   vCenter Server Failure Scenario 167   Running vCenter Server on VSAN 168   Bootstrapping vCenter Server 168 Summary 171 Chapter 8 Interoperability 173 vMotion 174 Storage vMotion 174 vSphere HA 175   vSphere HA Communication Network 175   vSphere HA Heartbeat Datastores 176   vSphere HA Metadata 177   vSphere HA Admission Control 177   vSphere HA Recommended Settings 177   vSphere HA Protecting VSAN and Non-VSAN VMs 178 Distributed Resource Scheduler 178 Storage DRS 179 Storage I/O Control 179 Distributed Power Management 180 VMware Data Protection 180   Backup VMs from a VSAN Datastore Using VDP 181   Restore VMs to a VSAN Datastore Using VDP 181 vSphere Replication 183   Replicate to VSAN at a Recovery Site 183   Recover Virtual Machine 184 Virtual Machine Snapshots 185 vCloud Director 185 VMware Horizon View 186   VSAN Support for Horizon View 186   VM Storage Policies on VMware View 187   View Confi guration 187   Changing the Default Policy 190   Other View Considerations 190 vCenter Operations 191 vSphere 5.5 62TB VMDK 192 Fault Tolerance 192 Stretched/vSphere Metro Storage Cluster 193 PowerCLI 193 C# Client 193 vCloud Automation Service 193 Host Profi les 194 Auto-Deploy 194 Raw Device Mappings 195 vSphere Storage APIs for Array Integration 195 Microsoft Clustering Services 195 Summary 195 Chapter 9 Designing a VSAN Cluster 197 Sizing Constraints 197 Failures to Tolerate = 1, Stripe Width = 1 199 Flash to Magnetic Disk Ratio 200 Designing for Performance 201   Impact of the Disk Controller 202 VSAN Performance Capabilities 206   VMware View Performance 207 Design and Sizing Tools 208 Scenario 1: Where to Start 209   Determining Your Host Confi guration 211 Scenario 2 213   Determining Your Host Confi guration 215 Scenario 3 217   Determining Your Host Confi guration 218 Summary 220 Chapter 10 Troubleshooting, Monitoring, and Performance 221 ESXCLI 221   esxcli vsan datastore 222   esxcli vsan network 223   esxcli vsan storage 224   esxcli vsan cluster 226   esxcli vsan maintenancemode 227   esxcli vsan policy 228   esxcli vsan trace 230   Additional Non-ESXCLI Commands for Troubleshooting VSAN 231 Ruby vSphere Console 236   VSAN Commands 237   SPBM Commands 256   PowerCLI for VSAN 259 VSAN and SPBM APIs 261   Enable/Disable VSAN (Automatic Claiming) 261   Manual Disk Claiming 261   Change the VM Storage Policy 262   Enter Maintenance Mode 262   Create and Delete Directories on a VSAN Datastore 262   CMMDS 262   SPBM 263 Troubleshooting VSAN on the ESXi 263   Log Files 263   VSAN Traces 264   VSAN VMkernel Modules and Drivers 264 Performance Monitoring 265   ESXTOP Performance Counters for VSAN 265   vSphere Web Client Performance Counters for VSAN 266   VSAN Observer 267 Sample VSAN Observer Use Case 273 Summary 276 TOC, 9780133854992, 7/3/14  

About the Author :
Cormac Hogan is a storage architect in the Integration Engineering team at VMware. Cormac was one of the first VMware employees at the EMEA headquarters in Cork, Ireland, back in 2005, and has previously held roles in VMware’s Technical Marketing and Support organizations. Cormac has written a number of storage-related white papers and has given numerous presentations on storage best practices and new features. Cormac is the owner of CormacHogan.com, a blog site dedicated to storage and virtualization. He can be followed on twitter @CormacJHogan.   Duncan Epping is a principal architect working for VMware R&D. Duncan is responsible for exploring new possibilities with existing products and features, researching new business opportunities for VMware. Duncan specializes in software-defined storage, hyperconverged platforms, and availability solutions. Duncan was among the first VMware Certified Design Experts (VCDX 007). Duncan is the owner of Yellow-Bricks.com and author of various books, including the VMware vSphere Clustering Technical Deepdive series.   He can be followed on twitter @DuncanYB.


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Product Details
  • ISBN-13: 9780133854992
  • Publisher: Pearson Education (US)
  • Publisher Imprint: VMWare Press
  • Height: 234 mm
  • No of Pages: 320
  • Sub Title: Administrator's Guide to VMware Virtual SAN
  • Width: 181 mm
  • ISBN-10: 013385499X
  • Publisher Date: 14 Aug 2014
  • Binding: Paperback
  • Language: English
  • Spine Width: 18 mm
  • Weight: 510 gr


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