Messages in this thread |  | | Date | Fri, 6 Sep 2002 10:22:43 -0300 (BRT) | From | Rik van Riel <> | Subject | Re: (fwd) Re: [RFC] mount flag "direct" |
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On Fri, 6 Sep 2002, Peter T. Breuer wrote:
> suppose that I make the FS twice as slow as before by meddling with > it to make it sharable > > then I simply share it among 4 nodes to get a two times _speed up_ > overall. > > That's the basic idea. Details left to reader.
The "detail" is lock contention. If you lock the filesystem and invalidate the caches you'll be able to do one operation every disk seek, across all nodes.
Chances are your 4-node system would have lower aggregate throughput than a single node system.
Rik -- Bravely reimplemented by the knights who say "NIH".
http://www.surriel.com/ http://distro.conectiva.com/
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