Nathan Rice wrote: > This is precisely the situation mmap was made for :) It has almost the same > methods as a file so it should be an easy replacement. > > <snip> Only on a 64bit system, and I'm not sure it's even possible there in every case. On a 32bit system, it would be impossible to mmap a 20gb file. You only have 4gb of address space to play with, total. DaveA