[comp.os.vms] my buffered vs. direct I/O question

SYSRUTH@utorphys.BITNET (02/02/88)

Hi everyone, sorry to take so long to get onto this; I have been very
busy preparing for the Canadian DECUS Symposium next week (you're all
coming, right?). (Incidentally, for those of you who might still change
your minds and come, our Keynote Speaker has been confirmed as ---
Mr. Bill Hancock, a very well-known network consultant whom some of
you may have heard of before).
     
Two of the most detailed replies, from Frank Nagy and Brad Wilson, were
posted on info-vax already, and since these covered the vital points,
as did the others I received directly, I will not post a compilation of
them here. In the end, although I am much wiser about the differences
between buffered vs. direct I/O, not much light has been shed on which
one is more expensive in terms of system resources. Like so many other
things in this world, the answer seems to be "It depends" (I nearly got
lynched in a game of Scruples once because I kept answering "It depends"
instead of "yes" or "no" :-) ). So I'm afraid I can't pass on any useful
answers to other people who wanted to know.
     
At any rate, I would like to thank all the other people who responded
as well. Your answers were greatly appreciated.
     
Ruth Milner
Systems Manager
University of Toronto Physics
     
SYSRUTH@UTORPHYS (BITNET)

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