Re: File System conversion -- ideas

[viro@parcelfarce.linux.theplanet.co.uk]

On Mon, Jun 30, 2003 at 01:36:41PM +0400, Hans Reiser wrote:
> I tend to agree with the below.  I just want to add though that there 
> are a lot of users who have one disk drive and and no decent network 
> connection to somewhere with a lot of storage.  It would be nice to 
> adapt tar to understand about the reiser4 resizer and mkreiser4 and the 
> reiser3 resizer, and the partitioner (yah, at this point it would no 
> longer really be tar, but.... ), and to have it shrink the V3 partition, 
> create a reiser4 partition, copy some of the V3 partition to the V4 
> partition, shrink the V3 partition some more, etc.....
> 
> Money will get us to do this.  Otherwise we will work on what we are 
> contracted to do for DARPA.

*Ugh*.  If one really wants reiserfs v3 -> v4 conversion, presumably
there are much more intelligent ways to do that.  For one thing,
you really don't want to create an empty tree and move the stuff
from original node-by-node - that would give a shitload of IO on
tree rebalancing alone, not to mention the PITA it will be for allocator
(you get to reshuffle trees a lot on potentially almost full fs).