The disclosed technology facilitates recovery from storage-related failures by checkpointing copy-on-write operation sequences. An operation sequence incorporating such checkpoints into a copy-on-write can include the following: receive a write request that identifies payload data to be written to a...http://www.google.com.tw/patents/US7409587?utm_source=gb-gplus-share專利 US7409587 - Recovering from storage transaction failures using checkpoints
