Planning a high availability model Validate and understanding support policies Understanding Live Migration Deployment Planning VM Failover Policies Datacenter Manageability
SAN Cluster iSCSI Cluster
iSCSI Cluster Application or service within VM crashes or hangs then moves to another VM Application Health Monitoring Apps or services moves to another VM for maintenance or patching of guest OS Application Mobility
FaultHost ClusterGuest Cluster Host Hardware Failure Parent Partition Failure VM Failure Guest OS Failure Application Failure
Host Clustering VM’s move from server to server Zero downtime to move a VM Works with any application or guest OS Guest Clustering Apps move from VM to VM Traditionally downtime when moving applications Requires “cluster aware” applications running on Windows Server Requires double the resources – 2 VM’s for single workload
CLUSTER iSCSI Guest Cluster SAN
iSCSI
ESX 3.5 or earlier vSphere 4.0vSphere 4.1 Windows NT Server 4.0 No Windows 2000 Server No Windows Server 2003 NoYes (limited hardware configurations) No Windows Server 2008 NoYes (See VMware restrictions) Windows Server 2008 R2 NoYes (See VMware restrictions)
demo
Improved Manageability Run Validate Easily Create Clusters & HA Roles Generate Dependency Reports Built-in Help ( Get-Help Cluster ) As well as online here here Hyper-V Integration Replaces cluster.exe as the CLI tool ActionCMDlet Make VMs Highly-AvailableAdd-ClusterVirtualMachineRole Quick MigrationMove-ClusterGroup Live MigrationMove-ClusterVirtualMachineRole Add a Disk to CSVAdd-ClusterSharedVolume Move CSV DiskMove-ClusterSharedVolume Update VM ConfigurationUpdate-ClusterVirtualMachineConfiguration
Client accessing VM VHD Live Migrate this VM to another physical machine
Memory content is copied to new server VHD VM pre-staged
VHD Pages are being dirtied Client continues accessing VM
VHD Smaller set of changes Recopy of changes
VHD Partition State copied VM Paused
VHD Old VM deleted once migration is verified successful Client directed to new host
Host OS is Free Hyper-V Server Windows Server Enterprise Windows Server Datacenter Licensed per Server Licensed per CPU No guest OS licenses 4 guest OS licenses Unlimited guest licenses
StorageHost ClusterGuest Cluster Fibre Channel (FC) Serial Attached SCSI (SAS) Fibre Channel over Ethernet (FCoE) iSCSI
SAN
Cluster
CLUSTER SAN
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