Create new files as sparse on NT systems. (2nd try)

Joe Buehler
Wed Feb 19 15:39:00 GMT 2003

Christopher Faylor wrote:

>>Because it runs as Cygwin app which is Unix-like environment.  There is
>>no way to set files sparse in Unix because all files are sparse if the
>>file systems supports it.
> ...which is, coincidentally enough, why I was interested in the patch.

It seems like a win to me -- UNIX files are always sparse by default: if you
seek to a location and write, blocks are filled in only at the location of
the write.

One thing to investigate would be what happens when Windows trys to mmap()
a sparse file.  It doesn't bother a UNIX box, but Windows?  Perhaps that
is what BitTorrent is presently doing?
Joe Buehler

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