Messages in this thread | | | Date | Fri, 5 Sep 2003 12:06:07 +0200 | From | Pavel Machek <> | Subject | Re: [Ext2-devel] Re: [RFC] extents support for EXT3 |
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Hi!
> > > 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?
It is going to be non-trivial: downgrading filesystem will likely need free space. And now: what happens when there's no free space?
Pavel -- When do you have a heart between your knees? [Johanka's followup: and *two* hearts?] - 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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