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SubjectRe: [Ext2-devel] Re: [RFC] extents support for EXT3
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Mike Fedyk <mfedyk@matchmail.com> writes:

> On Fri, Aug 29, 2003 at 06:25:02PM -0400, Ed Sweetman wrote:
> > you get no real slowdown as far as rough benchmarks are concerned,
> > perhaps with a microbenchmark you would see one and also, doesn't it
> > take up more space to save the extent info and such? Either way, all of
> > it's real benefits occur on large files.
>
> IIRC, if your blocks are contiguous, you can save as soon as soon as the
> file size goes above one block (witout extents, the first 12 blocks are
> pointed to by what? I forget... :-/ )

They are pointed to directly from the inode.

In light of other concerns how reasonable is a switch to e2fsck that
will remove extents so people can downgrade filesystems?

Also given the incompatibility on the file format any chance of this
being developed as ext4?

Eric
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