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SubjectRe: [RFC] extents support for EXT3
This patch seems to be against test2, just wondering if anyone before me 
has used it on the latest test release. If not then i'm gonna do
something stupid and be the first.


Alex Tomas wrote:
> this is 2nd version of the patch. changes:
> - error handling seems completed
> - lots of cleanups and comments
> - few minor bug fixed
>
> this version of the patch tries to solve couple
> of corner cases:
> - very long truncate
> - rewrite
>
> it survived dbench, bonnie++ and fsx tests.
>
> take a look at numbers I've just got, please.
>
> before after
> 5GB file, creation: 2m31.197s 2m21.933s
> 5GB file, read: 2m25.439s 2m24.833s
> 5GB file, rewrite: 2m48.434s 2m20.958s
> 5GB file, removal: 0m8.760s 0m0.858s
>
> before after
> dbench 16: 99.9868 MB/sec 179.243 MB/sec 16 procs
> dbench 16: 89.9919 MB/sec 203.119 MB/sec 16 procs
> dbench 16: 73.5519 MB/sec 185.815 MB/sec 16 procs
> dbench 16: 94.6312 MB/sec 188.519 MB/sec 16 procs
>
>
> to use extents you have to use 'extents' mount option
>
> Alex

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