Re: Block fragments in ext2

From: Alexander Viro (viro@math.psu.edu)
Date: Tue Apr 18 2000 - 08:44:28 EST


On Tue, 18 Apr 2000, Stephen C. Tweedie wrote:

> Hi,
>
> On Tue, Apr 18, 2000 at 09:12:47AM -0400, Alexander Viro wrote:
> >
> > Ouch. b-tree => potentially unbound amount of blocks to be written
> > during the operation.
>
> Yes, but if you are talking about storing extents rather than individual
> block mappings, then the amount of data in the tree will be a _tiny_
> fraction of the amount needed in the current scheme.

Yes. And what will it do to journalling/soft-updates/whatever equivalent
you prefer? At least with the normal scheme the amount of requests per
transaction is limited and we know the limit...

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