WSB 302 Live Migrate VM and Storage Between

WS-B 302

Live Migrate VM and Storage Between Clusters Live Migrate VM and Storage to Stand-Alone Server You can move a VM anywhere in your datacenter with zero downtime!

Client accessing VM Live Migrate this VM to another physical machine VHDX

Memory content is copied to new server VM pre-staged VHDX

Client continues accessing VM Pages are being dirtied VHDX

Recopy of changes Smaller set of changes VHDX

Partition State copied VM Paused VHDX

Client directed to new host Old VM deleted once migration is verified successful VHDX

• Windows Server 2012 now supports the ability to do multiple live migrations in parallel • Unlimited number of live migrations can be performed in parallel • Default configuration of 2 simultaneous LM’s per host • Wield this power wisely • Excessive number of simultaneous migrations may actually result in overall longer times than serially • Lets discuss on the next slide…

Disclaimer Results will vary based on hardware Time to Drain 32 VMs Migrate VM 20 Migrate VM 18 16 Network 14 12 10 8 6 4 2 0 1 3 32

Admin Initiate Cluster-Aware Updating Update Coordinator

Client accessing VM Storage Migrate this VHDX to another disk VM stays running servicing clients VHDX

New VHDX created on new storage VHDX

Writes mirrored to new Destination VHDX Reads are from Source VHDX

VHDX data copied from Source to Destination VHDX

Reads and Writes transitioned to new VHDX

• Protects from unplanned downtime: • • • Hardware Host OS VM Guest OS Apps in VMs

Node 1 Guest OS Node 2 Guest OS VDev VMMS RHS vmclusres. dll User Mode Clus. Svc Kernel Mode Net. FT

Shared Storage FC SAS RBOD Spaces RAID HBA SAS JBOD i. SCSI FCo. E Data Replication SMB Hardware Replication Software Replication Application Replication

I/O Redirected via network VM running on Node 2 is unaffected Coordination Node SAN Connectivity Failure VHDX VM’s can then be live migrated to another node with zero client downtime

Cluster

Guest Cluster CLUSTER SAN i. SCSI or FC CLUSTER SAN

VHDX

• Automatic and manual failover for DR • Supports 3 rd party hardware and software based replication

Hyper-V Replica Multi-Site Clustering • • RPO = 5 minutes RTO = Manual (longer) Cost = In-box in Windows Server Complexity = Low RPO = 0 minutes* RTO = Automatic (fast) Cost = High Complexity = High *depending on 3 rd party replication solution

Systems in lock step

Planned Downtime Unplanned Downtime Disaster Recovery

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