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Mastering VMware vSphere™ 4 by Scott Lowe

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10.5. Exploring VMotion

I've defined the VMware VMotion feature as the ability to perform a live migration of a virtual machine from one ESX/ESXi host to another without service interruption. This is a no-downtime operation; the end users do not know and are not aware that the virtual machine has been migrated between physical ESX/ESXi hosts. This is an extremely effective tool for load-balancing virtual machines across ESX/ESXi hosts. Additionally, if an ESX/ESXi host needs to be powered off for hardware maintenance or some other function that would take it out of production, VMotion can be used to migrate all active virtual machines from the host going offline to another host without waiting for a hardware maintenance window because the virtual ...

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