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Overview new feature enhancements coming in Windows Server 2012 R2 for Failover Clustering and availability Roadmap of incremental changes from Windows.

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Presentation on theme: "Overview new feature enhancements coming in Windows Server 2012 R2 for Failover Clustering and availability Roadmap of incremental changes from Windows."— Presentation transcript:



3 Overview new feature enhancements coming in Windows Server 2012 R2 for Failover Clustering and availability Roadmap of incremental changes from Windows Server 2012

4 File Based Storage Block Storage VHDX Guest Clustering Guest Clustering with commodity storage Sharing VHDX files provides shared storage for Hyper-V Failover Clustering Maintains separation between infrastructure and tenants Virtual SAS VM presented a shared virtual SAS disk Appears as shared SAS disk to VM Used for data disk only Cluster Shared Volumes (CSV) on block storage Scale-Out File Server for file based storage

5 Windows Server 2012 Windows Server 2012 R2 Fibre Channel iSCSI File (SMB) Shared VHDX



8 Still recommended to drain nodes before shutdown Recommended

9 Live migration Component level VM network health detection Media sense loss detection of network disconnects Health Monitoring Live migrates VMs off hosts with no external network connectivity for the VM Verifies destination node has the network available Configurable per network Recovery

10 Scale-out File Server File Server 2 File Server 1 Share2Share1Share2 SMB Client \\SOFS\Share1\\SOFS\Share2 Share1

11 Node 1 SMB Client Node 2


13 CSV cache supports allocating larger amounts of memory (up to 80% of total memory) Most interesting for Scale-out File Servers Scalability Physical Disk resource EnableBlockCache enabled by default Still need to enable via BlockCacheSize to allocate memory Defaults Recommended to enable CSV Cache for all Hyper-V and Scale-out File Server deployments Greater allocation for Scale-out File Server as they are not memory bound Recommended

14 Improved logging when creating a cluster and adding a node Enables pinpointing root cause quickly and easily Deployment Logging Increased logging to Operational channel for cluster resource state changes For example: When cluster resources move from one node to another State Logging

15 Displays on a per-node basis the CSV I/O mode and the reason if in a redirected mode Direct I/O, Block level redirected mode, File system level redirected mode Get-ClusterSharedVolumeState PowerShell cmdlet CSV State


17 ReFS with CSV Interoperability Tiered Spaces with CSV Parity Spaces with CSV Dedup with CSV Spaces Write-Back Caching with CSV

18 Cluster PropertyDefaultHyper-V Default SameSubnetThreshold510 CrossSubnetThreshold520

19 Update Greater than 50% of nodes must acknowledge before considered committed Toggled on by default for Hyper-V clusters Enables the cluster to move forward if there is a node with latency Majority All nodes must acknowledge before considered committed Default mode for all other workloads (SQL, Exchange, etc…) Configurable with DatabaseReadWriteMode cluster common property All



22 Always configure a witness with Windows Server 2012 R2 Clustering will determine when it is best to use the Witness Configure Disk Witness if shared storage, otherwise FSW New Recommendation Disk Witness 1 / 0 Node 1 / 1 Node 1 / 1 Node 1 / 1



25 Cluster Site1 Site2

26 Cluster Site1Site2 Manual Override with ForceQuorum Nodes Restarted When Site2 partition detected Nodes Restarted When Site2 partition detected


28 RolePositionNotes MSMQ ClustersNot SupportedMSMQ stores properties in AD File Server ClustersNot RecommendedKerberos for SMB preferred Hyper-V ClustersNot RecommendedNo live migration support SQL Server ClustersSupportedBest fit if using SQL Authentication

29 Simplified storage management with consolidation of multiple instances onto a single LUN Better capacity planning and storage utilization Addresses drive letter limitations allowing more than 24 SQL instances on a single cluster Consolidation Databases can be moved without requiring any drive ownership changes Faster Failover times with no dismounting and remounting of volumes required Increased resiliency to storage faults with CSV I/O redirection Chkdsk integration for file system correction with zero downtime Availability CSV block level read-only cache for unbuffered I/O to SQL databases Performance

30 Azure Private

31 SiteC SiteB 30s, 5m, or 15m replication frequencies Variable Recovery Point Objective (RPO) for metro vs. geographically dispersed SiteA Configurable Replication Frequencies Near site and offsite Replication Second hop can be equal to or greater replication frequencies than first hop Multiple Replica’s Windows Azure Hyper-V Recovery Manager (HRM) to manage datacenter level failover Site-to-site failover management at scale Management

32 Application RestartVirtual Machine RestartVirtual Machine FailoverVirtual Machine Migrate Recovery or Proactive based remediation Recovery – app restart, VM restart, failover, image recovery based on failures Proactive – migrate based on trends toward service loss; workload close to exceeding capacity Customizable recovery behavior App or VM restart limit In-guest remediation only - Enable/Disable App Heartbeat Turn off remediation during planned maintenance - Enter/Exit Maintenance mode Download the whitepaper at

33 Flexibility Reliability Interoperability NIC health detection and VM failover Dynamic Witness and survival of simultaneous 50% node loss SMB isolated instances and Server Service health detection CSV compatibility with Tiered Spaces, Parity Spaces, and Dedup Guest Clusters with shared VHDX files AD agnostic clusters without associated computer objects


35 Come Visit Us in the Microsoft Solutions Experience! Look for Datacenter and Infrastructure Management TechExpo Level 1 Hall CD For More Information Windows Server 2012 R2 Microsoft Azure System Center 2012 R2 Azure Pack cloud/products/windows-azure-pack





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