update on cowlinks - was: Re: [uml-devel] Re: [uml-user] one drawback to using cows commercially...

["roland" <for_spam@gmx.de>]

http://lwn.net/Articles/83790/
http://wohnheim.fh-wedel.de/~joern/cowlink/

----- Original Message ----- 
From: "BlaisorBlade" <blaisorblade_spam@yahoo.it>
To: "Jeff Dike" <jdike@addtoit.com>; "tim doyle" <tim@unclewebster.com>
Cc: "UML" <user-mode-linux-user@lists.sourceforge.net>; <user-mode-linux-devel@lists.sourceforge.net>
Sent: Sunday, April 11, 2004 4:51 PM
Subject: [uml-devel] Re: [uml-user] one drawback to using cows commercially...


Alle 04:17, martedì 30 marzo 2004, Jeff Dike ha scritto:
> tim@unclewebster.com said:
> > Is there any clever way to reset the root password for users, aside
> > from  deleting the cow? "linux single" is fine, but aside from that?
>
> I'm finishing up a new hostfs-like filesystem which I want to become the
> preferred mechanism to boot UMLs because of its ability to mmap data from
> the host, eliminating duplicate copies of file data in memory.
>
> A side-effect of this is that UML filesystems will become visible on the
> host, so password changing would be a matter of chrooting to the filesystem
> and running passwd.
>
> Currently, there is no COW functionality, but I plan to add file-level
> COWing with block-level COWing possibly following later.

Have you heard of the discussion about COWlinks? I.e. creating a Copy - On -
Write functionality for hard links? Or do you want to rewrite files one page
at a time (i.e. if I change one byte inside a file, only the "page"
containing that byte is copied and changed)?

http://lwn.net/Articles/77215/

-- 
Paolo Giarrusso, aka Blaisorblade
Linux registered user n. 292729




-------------------------------------------------------
This SF.Net email is sponsored by: IBM Linux Tutorials
Free Linux tutorial presented by Daniel Robbins, President and CEO of
GenToo technologies. Learn everything from fundamentals to system
administration.http://ads.osdn.com/?ad_id\x1470&alloc_id638&op=ick
_______________________________________________
User-mode-linux-devel mailing list
User-mode-linux-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel



-------------------------------------------------------
This SF.Net email is sponsored by: Oracle 10g
Get certified on the hottest thing ever to hit the market... Oracle 10g. 
Take an Oracle 10g class now, and we'll give you the exam FREE.
http://ads.osdn.com/?ad_id=3149&alloc_id=8166&op=click
_______________________________________________
User-mode-linux-devel mailing list
User-mode-linux-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel