- VMware HA i.e. High Availability which works on the host level and is configured on the Cluster.
- A Cluster configured with HA will migrate and restart all the vms running under any of the host in case of any host-level failure automatically to another host under the same cluster.
- VMware HA continuously monitors all ESX Server hosts in a cluster and detects failures.
- VMware HA agent placed on each host maintains a heartbeat with the other hosts in the cluster using the service console network. Each server sends heartbeats to the others servers in the cluster at five-second intervals. If any servers lose heartbeat over three consecutive heartbeat intervals, 5.VMware HA initiates the failover action of restarting all affected virtual machines on other hosts.
You can set virtual machine restart priority in case of any host failure depending upon the critical nature of the vm.
NOTE: Using HA in case of any host failure with RESTART the vms on different host so the vms state will be interrupted and it is not a live migration
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