XS Boston 2008 Fault Tolerance

Kemari is a virtual machine synchronization technique that allows fault tolerance by keeping a primary and secondary VM identical. It uses DomT, a para-virtualized domain, to efficiently synchronize state between VMs by tapping event channels and only transferring updated memory pages. Evaluation shows the secondary VM can continue transparently and with acceptable performance during network, storage and file I/O workloads when the primary hardware fails.