Techniques for maintaining mirrored storage cluster data consistency can employ write-intent logging. The techniques can be scaled to any number of mirror nodes. The techniques can keep track of any outstanding I/Os, data in caches, and data that has gone out of sync between mirrored nodes due to link...http://www.google.com/patents/US8046548?utm_source=gb-gplus-sharePatent US8046548 - Maintaining data consistency in mirrored cluster storage systems using bitmap write-intent logging
