Messages in this thread |  | | Date | Tue, 25 Sep 2001 10:04:24 -0400 | Subject | Re: [reiserfs-list] Re: [PATCH] 2.4.10 improved reiserfs a lot, but could still be better | From | (bill davidsen) |
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In article <20010924185755.E4126@schmorp.de> Marc Lehmann wrote: | On Mon, Sep 24, 2001 at 06:53:03PM +0200, Matthias Andree | <matthias.andree@stud.uni-dortmund.de> wrote: | > Linear writing as dd mostly does is BTW something which should never be | > affected by write caches. | | A write cache can and will speed up linear writes on typical ide setups.
Pedantically I guess that's true, but I wouldn't expect any significant change unless the drive were badly fragmented, since the write cache on the drive should hold enough data to allow all data to a track to be written in a single revolution.
Write cache makes a big difference in normal use, where seeks and such can be optimized, but for a single process writing a single file (ie. dd) I don't see where it would or could help much.
Since the single process is not a typical case on most systems, I don't see that it's a burning question.
-- bill davidsen <davidsen@tmr.com> "If I were a diplomat, in the best case I'd go hungry. In the worst case, people would die." -- Robert Lipe - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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