Messages in this thread |  | | Date | Tue, 25 Sep 2001 15:17:21 +0200 | From | Matthias Andree <> | Subject | Re: [PATCH] 2.4.10 improved reiserfs a lot, but could still be better |
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Could you please only quote the relevant parts, particularly, would you erase deeper nesting of quotes in your replies? That'd help a lot of people transfer less data they can still easily get from their own mailer at a keypress. Thanks a lot.
On Tue, 25 Sep 2001, Jorge Nerín wrote:
> Who says test.zero is a linear file and it's not scattered around the > whole disk and the fs layer is filling holes...? If it's the case the > write cache is a BIG win, just think that the fs writes a chunk at the > beggining of the disk, then another chunk at the end, then another near > the beginning, then... you get the picture, in this case the disk > reorders the seeks to best fit. > > If you want to try a REAL linear write do a dd if=/dev/zero of=/dev/hde7 > or whatever unused partition you have.
I did, and it showed almost the same behaviour, twice as fast with write cache turned on.
Scattering the writes would (usually) only happen on a nearly filled disk. - 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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