Re: Comparison to Hammer fs design

(resent after subscribing to the the kernel <at> crater)

On Friday 25 July 2008 11:53, Matthew Dillon wrote:
> 
> :Hi;
> :
> :The announcement of yet another filesystem:
> :
> :http://lkml.org/lkml/2008/7/23/257
> :
> :led to some comments about hammer fs:
> :
> :http://tux3.org/pipermail/tux3/2008-July/000006.html
> :
> :enjoy,
> :
> :     Pedro.
> 
>     Those are interesting comments.   I think I found Daniel's email address
>     so I am adding him to the To:   Dan, feel free to post this on your Tux
>     groups if you want.

How about a cross post?

>     I did consider multiple-parentage...  that is the ability to have a
>     writable snapshot that 'forks' the filesystem history.  It would be
>     an ultra cool feature to have but I couldn't fit it into the B-Tree
>     model I was using.  Explicit snapshotting would be needed to make it
>     work, and the snapshot id would have to be made part of the B-Tree key,
>     which is fine.  HAMMER is based around implicit snapshots (being able