Consequences of Virtual Machines(VM) after the hardware failure

20 pts.
Tags:
Citrix XenServer
Virtual Machines
XenMotion
XenServer
What will be the consequences if hardware failure occurs when VMs are running on a server? what will be the VM status? whether we will loose the data or not? There may be a xen-motion , but when the server crashes , what will be the status of the VM's running on that server ?

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If the host hardware fails, all virtual machines running on that hardware will shutdown. You shouldn’t have any data loss, unless you loose enough hard drives to have a storage failure. Once you correct the hardware problem and bring the host OS back online you should be able to restart the virtual machines and be back up and running.

If you have a cluster of host machines many VM solutions provide for a way to use shared storage and migrate the virtual machines from the failed machine to another machine in the cluster where the machine can be restarted, then migrated back to the failed machine after it has been brought back online.

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  • Blithespirit
    You would of course lose the data in your page file and memory, but nothing else. there is no technology at this moment in time that will save everything however there are rumours that this will change in the near future with certain vendors saying they will have VM's that can be replicas ready to take over at a few seconds notice but again nothing is confirmed yet so not holding breath
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