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KvmFS: Virtual Machine Partitioning For Clusters and Grids

Latchesar Ionkov (lionkov@lanl.gov)

This paper describes KvmFS, a synthetic file system that can be used to control one or more KVM virtual machines running on a computer. KvmFS is designed to provide its functionality via an interface that can be exported to other machines for remote configuration and control. The goal of KvmFS is to allow a multi-CPU, multi-core computer to be partitioned externally in a fashion similar to today's computational nodes on a cluster. KvmFS is implemented as a file server using the 9P protocol and its main daemon can be mounted locally via the v9fs kernel module. Communication with the KvmFS occurs through standard TCP sockets. Virtual machines are controlled via commands written to KvmFS' files. Status information about KVM virtual machines is obtained by reading KvmFS. KvmFS allows us to build clusters in which more than one application can share the same SMP/Multi-core node with minimalistic full system images tailored specifically for the application.