How does windows handle multiple file descriptor to the same file on
hard disk owned by say two different threads within a process ? Here
is the scenario: a)i have main thread which opens a file (from CIFS
mounted file system) and memory maps it for reading. b)Second thread
opens the
same file to read the contents of the file(no memory map). Both of
these activities are done simultaneously and they could be reading
data at different offsets at any given pt of time. I see that with a
test program to test this scenario, (a) done alone has good
performance (i mean the file was mmaped and the data was read faster)
than when it was done in parallel
with (b). Is this a well known problem? Is there a way to address this
problem and make the simultaneous access faster ?