Messages in this thread | | | Date | Mon, 23 Aug 1999 10:42:05 -0700 | From | Peter Monta <> | Subject | Re: Streaming disk I/O kills file buffering and makes Linux unusable |
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> > I agree; the raw-io system will make this much more pleasant. > > Why do you think so? > > IO is IO, whether it is raw or not. And it will eat up resources from > everybody else trying to do IO.
True; raw I/O won't magically increase resources. But it offers a valuable way to tell the kernel something it can't know/infer: a good buffering policy for streaming data. The existing cache mechanism for normal I/O works fine but is inappropriate for this case; indeed perfectly good working sets are messed up by buffering the streaming data, as Benno points out.
Cheers, Peter
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