Phil Endecott wrote:
Does anyone have any ideas about the behaviour of memory-mapped files on network filesystems, i.e. NFS and/or Windows shares? Is there any chance that Boost.Interprocess could use mmaped files on such filesystems, with instances of the program running on different machines sharing data?
MSDN has this to say for CreateFileMapping:
Although *CreateFileMapping* works with remote files, it does not keep them coherent. For example, if two computers both map a file as writable, and both change the same page, each computer only sees its own writes to the page. When the data gets updated on the disk, it is not merged.
Although I couldn't find concrete information in the man pages, some Google results on "mmap consistent" suggest that mmap behaves the same. Sebastian Redl