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NIC 2013 - Hyper-V Replica
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NIC 2013 - Hyper-V Replica


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  • 1. Hyper-V ReplicaKristian NeseCTOLumagate
  • 2. Average # of outages per year ?A. 1B. 3C. 6D. 25
  • 3. Average # of outages per year ?A. 1B. 3C. 6D. 25Downtime cost per day ?A. $500B. $3,850C. $7,750D. $12,500
  • 4. Average # of outages per year ?A. 1B. 3C. 6D. 25Downtime cost per day ?A. $500B. $3,850C. $7,750D. $12,500
  • 5. Average # of outages per year ?A. 1B. 3C. 6D. 25Downtime cost per day ?A. $500B. $3,850C. $7,750D. $12,500 x 6 = $75,000!
  • 6. % of SMB respondents who DO NOT have aDisaster Recovery plan?A. 10B. 15C. 25D. 50
  • 7. % of SMB respondents who DO NOT have aDisaster Recovery plan?A. 10B. 15C. 25D. 50!
  • 8. Those 50% of SMB Disaster Recoveryplan is…
  • 9. Session Objectives and Takeaways• Relevance and Overview of Hyper-V Replica• Capabilities and Value Proposition• Deployment Considerations
  • 10. Relevance of Hyper-V Replica Hyper-V & Failover Clustering: Hyper-V Replica: Availability across datacenter Site A Site B
  • 11. Overview of Hyper-V Replica Affordable Easy to manage Flexible
  • 12. Flexible Deployment• Replication between two data centers• Replication between SMB to hoster
  • 13. DEMO
  • 14. Asynchronous Replication
  • 15. Replication Resiliency• Resiliency from Failures • Retry and resume semantics • Resynchronization• Seamless handling of VM Mobility • No admin intervention required • Live Migration, Storage Migration and Quick Migration • Within cluster and across cluster
  • 16. VM Mobility Site Site A B • Pre-requisites: • Primary migration: All primary servers must be authorized • Replica migration: Requires Hyper-V Replica Broker
  • 17. DR Scenarios
  • 18. Planned Failover • Testing DR or site maintenance or impending disaster • Zero data loss but some downtime • Efficient reverse replication 1. Shutdown primary VM Site A Site B 2. Send last log 3. Failover Replica VM 4. Reverse replicate
  • 19. Network Configuration on ReplicaVM Connectivity on Replica Primary Replica Vswitch creation and assignment 10.22.100.XX 15.25.10.XX VLAN taggingVM identity in a different subnet Inject static IP address Auto assignment via DHCP Preserve IP address via Network Virtualization ClientVM Name Resolution Server IP Address Update DNS records to reflect new IP address Name SQLVM 15.25.10.XX 10.22.100.X X
  • 20. DEMO
  • 21. Test Failover • Non-disruptive testing of workload – zero downtime • Test any recovery point • Pre-configure isolated network Site A Site B
  • 22. Test Failover Setup
  • 23. DEMO
  • 24. Deployment Considerations
  • 25. Network Capacity Capacity planning is critical Estimate rate of data change Estimate for peak usage and effective network bandwidth 15 Avg. Replication Latency (mins) 10 5 0 0.5 GB 1 GB 3 GB 5 GB 7 GB 8 GB 10 GB Uncompressed data transferred in 24 hrs
  • 26. Network Throttling• Use Windows Server 2012 QoS to throttle replication traffic• Throttling based on the destination subnet New-NetQosPolicy “Replication Traffic to” –DestinationAddress –MinBandwidthWeightAction 40• Throttling based on the destination port New-NetQosPolicy “Replication Traffic to 8080” –DestinationPort 8080 – ThrottleRateActionBytesPerSecond 100000
  • 27. Network Utilization• Replicating multiple VMs in parallel • Higher concurrency leads to resource contention and latency • Lower concurrency leads to underutilizing• Manage initial replication through scheduling• Manage delta replication Network bandwidth Ideal number of parallel transfers 1.5 Mbps, 100ms, 1% packet 3 (Default) loss 300 Mbps, 10ms, 1% packet 10 loss
  • 28. Backup Interoperability• Backup copy to seed Initial Replication• Back-up Primary VM • Concurrent backup and replication are handled seamlessly • Restore of Primary VM requires resync• Back-up Replica VM • Replica VM turned off • Backup is on hold when VHD is modified by replication • Restore of replica VM requires resync
  • 29. Server Impact• Impact on primary server • Storage space: Proportional to writes in the VM • Storage IOPS on ~ 1.5 times write IOPS• Impact on replica server • Storage space: Proportional to the write-churn • Each additional recovery point ~10% of the base VHD size • Storage IOPS: •• Memory ~50MB per replicating VHD• CPU impact <3%
  • 30. DEMO
  • 31. In Review: Session Objectives andTakeaways• Relevance of Hyper-V Replica and when to use it • Complements high availability and migration• Capabilities and Value Proposition • Inbox solution • Flexible deployment scenarios • Comprehensive replication and failover capabilities• Deployment Considerations • Network • System Impact • Back-up Inter-op
  • 32. Q&A