Invention Grant
- Patent Title: Non-disruptive, reliable live migration of virtual machines with network data reception directly into virtual machines' memory
- Patent Title (中): 虚拟机无间断可靠的实时迁移,网络数据接收直接进入虚拟机内存
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Application No.: US12332800Application Date: 2008-12-11
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Publication No.: US07996484B2Publication Date: 2011-08-09
- Inventor: Sambhrama Madhusudhan Mundkur , Alireza Dabagh
- Applicant: Sambhrama Madhusudhan Mundkur , Alireza Dabagh
- Applicant Address: US WA Redmond
- Assignee: Microsoft Corporation
- Current Assignee: Microsoft Corporation
- Current Assignee Address: US WA Redmond
- Agency: Woodcock Washburn LLP
- Main IPC: G06F15/173
- IPC: G06F15/173

Abstract:
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.
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