Best ofmms2013didiervanhoye
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Didier Van Hoye - Technical Architect
Microsoft MVP & MEET Memberhttp://workinghardinit.wordpress.com
@workinghardinit
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Live Migrate VM and Storage
to Clusters
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!
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Client accessing VM
Live Migrate this
VM to another
physical machine
VHDX
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Memory content is
copied to new server
VM pre-staged
VHDX
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Pages are being
dirtied
Client continues
accessing VM
VHDX
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Smaller set of
changes
Recopy of changes
VHDX
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Partition State copied
VM Paused
VHDX
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Old VM deleted once
migration is verified
successful
Client directed to new
host
VHDX
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• 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
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•
•
•
•
•
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Update
Coordinator
Admin
Initiate
Cluster-Aware Updating
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Storage Migrate
this VHDX to
another disk
Client accessing VM
VM stays running
servicing clients
VHDX
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New VHDX created
on new storage
VHDXVHDX
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Writes mirrored to new
Destination VHDX
Reads are from
Source VHDX
VHDX VHDX
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VHDX data copied from
Source to Destination
VHDXVHDX
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Reads and Writes
transitioned to new VHDX
VHDX
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• Protects from unplanned downtime:• Hardware
• Host OS
• VM
• Guest OS
• Apps in VMs
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NetFT
Node 1
ClusSvc
VMMS
User
Mode
Kernel
Mode
RHS
Guest OS
VDev
NetFT
Node 2
ClusSvc
VMMS
RHS
Guest OS
VDev
vmclusres.dllvmclusres.dll
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FC SAS RBOD
iSCSI FCoE
SAS JBOD
Shared Storage
RAID HBA Software
ReplicationHardware
Replication
SMB
Data Replication
Application
ReplicationSpaces
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VM running on Node 2 is
unaffected
Coordination
Node
SAN Connectivity
Failure
I/O Redirected via
network
VM’s can then be live migrated to another
node with zero client downtime
VHDX
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Cluster
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CLUSTER CLUSTERiSCSI or FC
Guest Cluster
SAN SAN
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VHDX VHDX
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• Automatic and manual failover for DR
• Supports 3rd party hardware and software based replication
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Hyper-V Replica• RPO = 5 minutes
• RTO = Manual (longer)
• Cost = In-box in Windows Server
• Complexity = Low
Multi-Site Clustering• RPO = 0 minutes*
• RTO = Automatic (fast)
• Cost = High
• Complexity = High
*depending on 3rd party replication solution
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Systems in
lock step
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Planned
Downtime
Unplanned
DowntimeDisaster Recovery
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