A method includes determining a garbage collection list for a data storage structure of a node in a data storage system, the garbage collection list including one or more layout map identifiers (IDs) for garbage collection. A data fragment stored on the data storage structure is located at a first location...http://www.google.com.au/patents/US7299325?utm_source=gb-gplus-sharePatent US7299325 - Method of garbage collection on a data storage system
