公开(公告)号：US11995459B2

公开(公告)日：2024-05-28

申请号：US17002233

申请日：2020-08-25

Applicant: VMware, Inc.

Inventor： Arunachalam Ramanathan ,  Yanlei Zhao ,  Anurekh Saxena ,  Yury Baskakov ,  Jeffrey W. Sheldon ,  Gabriel Tarasuk-Levin ,  David A. Dunn ,  Sreekanth Setty

IPC: G06F9/455 ,  G06F9/50 ,  G06F12/1027

CPC classification number: G06F9/45558 ,  G06F9/5077 ,  G06F12/1027 ,  G06F2009/4557 ,  G06F2009/45583 ,  G06F2212/152

Abstract: A virtual machine (VM) is migrated from a source host to a destination host in a virtualized computing system, the VM having a plurality of virtual central processing units (CPUs). The method includes copying, by VM migration software executing in the source host and the destination host, memory of the VM from the source host to the destination host by installing, at the source host, write traces spanning all of the memory and then copying the memory from the source host to the destination host over a plurality of iterations; and performing switch-over, by the VM migration software, to quiesce the VM in the source host and resume the VM in the destination host. The VM migration software installs write traces using less than all of the virtual CPUs, and using trace granularity larger than a smallest page granularity.