I am wondering about use of locality flags:

            000  OPEN_FLAGS_NO_LOCALITY       (0x00000000)
            001  OPEN_FLAGS_SEQUENTIAL        (0x00000100)
            010  OPEN_FLAGS_RANDOM            (0x00000200)
            011  OPEN_FLAGS_RANDOMSEQUENTIAL  (0x00000300)

When is No Locality used. To open a file for level 3 info or EA info
without intention of reading or writing data?  Am wondering also how
locality would affect things such as buffer/cache size and count, as
well as read prefetch (the opposite of a lazy write, if there is such a
thing?)

I am also wondering how no locality would affect two other options:

       14        OPEN_FLAGS_WRITE_THROUGH (0x00004000)
       12        OPEN_FLAGS_NO_CACHE (0x00001000)

Write through (syncronous) obviously disables lazy writes.  Would
opening a file with no locality make the no cache option irrelevant? Is
the no cache option the same as theno locality specifier?

Thx
John

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