[boost] [sorting] External Sorting

Would there be any interest sorting functions that sort data that is written to disk? I know that it sounds somewhat useless, but if the data on disk takes up 10gb, I know that no computer can load all of that data at once, even with virtual memory. This type of sort is also useful for low-memory machines, like a roadside speedometer, where large amounts of data need to be sorted but cannot fit into memory.