公开(公告)号：US20130246355A1

公开(公告)日：2013-09-19

申请号：US13847956

申请日：2013-03-20

Applicant: VMWARE, INC.

Inventor： Michael NELSON ,  Daniel J. SCALES ,  Andrew TUCKER

IPC: G06F17/30

CPC classification number: G06F17/30575 ,  G06F9/45533 ,  G06F11/1484 ,  G06F11/203 ,  G06F11/2046 ,  G06F11/2097 ,  G06F2201/815

Abstract: Techniques for creating a fault tolerant system in a virtual machine environment utilize a primary VM and a backup VM. To initialize the fault tolerant system, the backup VM and primary VM start from the same state. To achieve this in one embodiment, the primary VM is suspended and the state of the primary VM is copied to the backup VM. Once the backup VM has received all the primary VM's state, the primary VM is resumed. Subsequent state changes of the primary VM are buffered until the backup VM resumes, connects to the primary VM, and starts consuming the buffered content. Thereafter, synchronization is maintained by the primary VM's writing relevant state changes to a log and the backup VM's reading such relevant state changes from the log.

Abstract translation: 在虚拟机环境中创建容错系统的技术使用主虚拟机和备份虚拟机。 要初始化容错系统，备份虚拟机和主虚拟机从相同的状态开始。 为了在一个实施例中实现这一点，主VM被暂停并且主VM的状态被复制到备份VM。 一旦备份虚拟机已经接收到所有主虚拟机的状态，则主VM将被恢复。 主虚拟机的后续状态更改将被缓存，直到备份虚拟机恢复，连接到主虚拟机，并开始消耗缓冲的内容。 此后，主虚拟机将相关状态更改写入日志并维护备份虚拟机的读取，从日志中读取相关状态。