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CRFS and POHMELFS [LWN.net]
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CRFS and POHMELFS

CRFS and POHMELFS

Posted Feb 7, 2008 7:20 UTC (Thu) by heini (guest, #33614)
Parent article: CRFS and POHMELFS

Looks like both projects try to reinvent AFS.


to post comments

CRFS and POHMELFS

Posted Feb 7, 2008 9:41 UTC (Thu) by nix (subscriber, #2304) [Link] (3 responses)

AFS, with a much more efficient protocol, not a horror to administer, and 
actually making an effort to be a POSIX filesystem rather than 
gratuitously reinventing things like, oh, permissions?

Seems like a good thing to me, although you could replace `AFS' with 'a 
distributed filesystem' and get the same answer :)

CRFS and POHMELFS/AFS

Posted Feb 8, 2008 3:17 UTC (Fri) by linuxbox (guest, #6928) [Link] (2 responses)

A more interesting comparison for me would be CRFS vs. GFS or OCFS--which, I rather suspect,
is more what the btrfs authors are aiming at.

CRFS and POHMELFS/AFS (what about HAMMER?)

Posted Feb 8, 2008 13:03 UTC (Fri) by Velmont (guest, #46433) [Link]

How does HAMMER fit into all of this? Yes, it is being developed for DragonflyBSD, but it
could maybe come into Linux. Does anyone know? :-)

CRFS and POHMELFS/AFS

Posted Feb 9, 2008 22:42 UTC (Sat) by giraffedata (guest, #1954) [Link]

I'd like to know how it's better than NFSv4. The only reason NFSv4 exists is to solve those classic NFS problems. It definitely has client-side caching and POSIX inter-user synchronization of file access.

CRFS and POHMELFS

Posted Feb 7, 2008 10:41 UTC (Thu) by IkeTo (subscriber, #2122) [Link]

From AFS FAQ:

> Subject: 2.01  What are the differences between AFS and a unix filesystem?
> ...
>    Authentication:                                         [ User ]
> ...
>    File permissions:                                       [ User ]
> ...
>   Data protection with AFS ACLs:                          [ User ]
> ...
>   Protection groups:                                      [ User ]
> ...
>   Hard links:                                             [ User ]
> ...
>   Changing file protection by moving a file:              [ User ]
> ...
>   chown and chgrp:                                        [ User ]
> ... 
>   Save on close:                                          [ Programmer ]
> ...
>   byte-range file locking:                                [ Programmer ]
> ...
>   whole file locking:                                     [ Programmer ]
> ...
>   character and block special files:                      [ SysAdmin ]
> ...
>   AFS version of fsck:                                    [ SysAdmin ]
> ...

Is this the type of things that CRFS explicitly says they want to avoid?


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