Gang Migration of Virtual Machines using Cluster-wide Deduplication

Description:

Simultaneous live migration of multiple virtual machines (VMs) from one set of physical machines to another

Background:

Gang migration refers to the simultaneous live migration of multiple virtual machines (VMs) from one set of physical machines to another. Gang migration generates a large volume of network traffic and can overload the core network links and switches in a datacenter.

Technology Overview:

The developed approach alleviates the network overhead of gang migration using global deduplication (GMGD). GMGD identifies and eliminates the retransmission of duplicate memory pages among VMs that may be running on multiple physical machines in the cluster.

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Advantages:

GMGD substantially reduces the network traffic on core links and the total migration time of VMs when compared to the default migration technique in QEMU/KVM.
GMGD has a smaller adverse performance impact on network-bound applications.