Fault Isolation and Quick Recovery in Isolation File Systems

Lanyue Lu presented isolation file systems, providing fault isolation and quick recovery within a single file system. Because file systems are important data access interfaces in many environments, high availability is critical; however, a single fault can trigger a large-scale impact for the whole file system, such as remounting as read-only and a system crash. Lanyue explained how a metadata corruption of a virtual machine disk image can affect multiple virtual machines that share the same hyper visor file system. Lanyue argued that modern file systems do not provide fine-grained fault isolation, thus all the files within a file system share a single fault domain.