HotRestore: A Fast Restore System for Virtual Machine Cluster

Due to the frequency of failures in virtual machines and to enhance the reliability of virtualized environments, current systems restore failed virtual machine to last known state by using snapshots. This method requires a long time to restore the virtual machine due to the large size of snapshot file, in clustered environment the problem even worse since one restored virtual machine may send a packet to currently restoring virtual machine which leads to TCP backoff problem. This paper presents HotRestore which aims to restore virtual machine cluster rapidly and mitigate the TCP backoff problem.

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