Non-disruptive, reliable live migration of virtual machines with network data reception directly into virtual machines' memory

Techniques are disclosed for the non-disruptive and reliable live migration of a virtual machine (VM) from a source host to a target host, where network data is placed directly into the VM's memory. When a live migration begins, a network interface card (NIC) of the source stops placing newly r...

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Bibliographic Details
Main Authors MUNDKUR SAMBHRAMA MADHUSUDHAN, NAGAMPALLI NARASIMHA RAO S. S, DABAGH ALIREZA, GREEN DUSTIN LYLE
Format Patent
LanguageEnglish
Published 02.10.2012
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Summary:Techniques are disclosed for the non-disruptive and reliable live migration of a virtual machine (VM) from a source host to a target host, where network data is placed directly into the VM's memory. When a live migration begins, a network interface card (NIC) of the source stops placing newly received packets into the VM's memory. A virtual server driver (VSP) on the source stores the packets being processed and forces a return of the memory where the packets are stored to the NIC. When the VM has been migrated to the target, and the source VSP has transferred the stored packets to the target host, the VM resumes processing the packets, and when the VM sends messages to the target NIC that the memory associated with a processed packet is free, a VSP on the target intercepts that message, blocking the target NIC from receiving it.
Bibliography:Application Number: US201113194402