Design and implementation of a low-overhead file checkpointing approach

One of checkpointing and recovery technique´s most important capabilities is file checkpointing, i.e., to save and restore the state of user files of the process. The paper describes the design and implementation of a file checkpointing approach called Modification Operation Buffering. This approach buffers all the modification operations after a checkpoint until the next one, making all the operations between two checkpoints atomic as a whole. By choosing a suitable size dynamically for memory buffer, and by hiding the latency of flushing the buffer, this approach achieved an overhead lower than other approaches.