Cluster Shared Volumes Reborn in Windows Server 2012

Cluster Shared Volumes Reborn in Windows Server 2012: Deep Dive Amitabh Tamhane Program Manager 2 Microsoft Corporation Vineeth Karinta Senior Engineer Net. App

Cluster Shared Volumes (CSV) in Windows Server 2012

Flexibility Manageability No LUN per Application Fewer LUNs reduce SAN complexity Scalability No drive letter limitation Capacity Better SAN space utilization

What it delivers

Under the hood CSV Architecture

I/O synchronization overview Metadata Simultaneous read/write access • All cluster nodes Read/Write Server side metadata sync • Avoids I/O interruptions Shared LUN VHD VHD Shared Storage

Key Takeaways Metadata updates are small operations that happen infrequently for VMs Parallel metadata updates that are non-disruptive for applications

CSVFS A Proxy File System VM Share CSVFS Coordinator Node Client / SMB Server / SMB CSV Proxy File System CSV Volume. Mgr Disk NTFS Volume Manager Node 2 Node 1 Direct I/O CSV File System Filter SAN

Consistent view across the cluster

Mount Points

demo Setting up Clustered Shared Volumes Amitabh Tamhane Program Manager 2 Clustering and High Availability

Resiliency How CSV Enables Even Higher Availability

CSV Resiliency

I/O Redirected via network VM running on Node 2 is unaffected Coordination Node SAN Connectivity Failure VHD VM live migration with zero downtime

New Coordination Node Failure VM running on Node 2 is unaffected Coordination Node Brief queuing of I/O while volume ownership is changed Volume relocates to a healthy node VHD

Metadata Updates Rerouted to redundant network VM running on Node 2 is unaffected Coordination Node Network Path Connectivity Failure VHD

Flexible storage choices for the private cloud Accessing VHDs over SMB Hyper-V Cluster Single Logical Server (\FooShare) Single File System Namespace Cluster Shared Volumes File Server Cluster

CHKDSK / SPOTFIX Integration 400 <3 sec of downtime 350 Minutes 300 250 Windows Server 2008 R 2 200 150 Windows Server 2012 100 50 0 100 200 300 Million Files From Hours to Seconds …

Performance Improved CSV Performance

Distributed write-through cache • Unbuffered I/O (excluded from Windows Cache Manager) • Consistent across cluster Windows Cache Manager integration • Buffered I/O • Same as traditional NTFS Huge value for Pooled VDI VM scenario • Read-only parent VHD • Read-write differencing VHDs

CSV Optimizations Direct I/O Redirected I/O • Block level I/O performance parity • Remote file system (SMB) performance parity

Share VM VM Share CSVFS Coordinator Node Client / SMB Server / SMB CSV Proxy File System CSV Volume. Mgr CSV File System Filter NTFS Volume Manager Disk Storage Connection Broken or not present Node 2 Node 1 SAN Avoids traversing File System stack twice Delivers 2 x performance

SMB 3. 0 integration VM with I/O being redirected 10. 10. X 20. 20. X CSV Streaming I/O Across Multiple Networks VHD Coordinator Node

Inherit gains for CSV redirection performance SQL TPC-C transactions/s 4270 (98%) 4315 (100%) 4500 4000 3500 3000 1175 (27%) 2500 2000 1500 1000 500 0 SMB + DAS

CSV Redirected mode Many Pieces Come Together for Radical Improvement I/O redirection needed less often SMB 3. 0 Multi-Channel SMB 3. 0 Direct (RDMA) CSV Block Level Redirection CSV Block Cache

Deployment Considerations

Deployment considerations

Backup CSV Backup and Restore

Net. App CSV Backup using Net. App Snap. Manager Vineeth Karinta Senior Engineer Net. App

SMHV MMC Snap In Power. Shell CLI Backup Node SMHV Service (VSS Requester) VSS Requester (no participation) VSS Service Hyper-V writer Non Requestor Nodes VSS Service CSV writer Hyper-V writer CSV Providers Data ONTAP Hardware provider (no participation) VM 1 “Host 1” Demosvr-01 VM 3 VM 4 VM 2 i. SC SI, FC P, CSV FC o. E VHD VHD Data ONTAP® Single Windows Volume “Host 2” Demosvr-02

Backup Demo CSV Backup using Net. App Snap. Manager for Hyper-V Vineeth Karinta Senior Engineer Net. App

Key Takeaways INFRASTRUCTURE as a SERVICE

WSV 315 Windows Server 2012 File System Enhancements: Redefining File Storage VIR 401 Hyper-V High Availability and Mobility: Designing the Infrastructure for Your Private Cloud WSV 324 Building a Highly Available Failover Cluster Solution with Windows Server 2012 from the Ground UP WSV 411 Guest Clustering and VM Monitoring in Windows Server 2012 VIR 301 Windows Server 2012 Hyper-V Storage VIR 304 Building Flexible Hyper-V Environments Windows Server 2012 Hyper-V Live Migration and Live Storage Migration VIR 306 Hyper-V over SMB: Remote File Storage Support in Windows Server 2012 Hyper-V Find Us Later at the “Availability” Booth http: //blogs. msdn. com/b/clustering/

#TE(sessioncode) Talk to our Experts at the TLC DOWNLOAD Windows Server 2012 Release Candidate Hands-On Labs microsoft. com/windowsserver DOWNLOAD Windows Azure Windowsazure. com/ teched

Learning Connect. Share. Discuss. Microsoft Certification & Training Resources http: //northamerica. msteched. com www. microsoft. com/learning Tech. Net Resources for IT Professionals Resources for Developers http: //microsoft. com/technet http: //microsoft. com/msdn

Complete an evaluation on Comm. Net and enter to win!

Scan the Tag to evaluate this session now on my. Tech. Ed Mobile