On Tue, Aug 03, 2004 at 05:05:16PM +0200, Jörn Engel wrote: > To avoid sending a pure test message and being banned from the list, > I'll have to add something useful as well... cowlinks. > > Matt and Herbert have told me they really want that project to get > finished asap - reason enough for me to give it some more focus again. > > The patches on the webpage got updated and now include a fix from > Herbert. Thanks for that one! If noone beats me to it, I'll check > with Andrew Morton whether the three infrastructure patches can be > included into -mm.
sounds good, btw, I heard the copious locking was removed? (matt told so, if I got him right) > Madcow is called mad because it's just that. You have to decide > whether you want hard links or cow links. Either get rid of hard > links completely and confuse some programs. Or use them for some > directory trees only and get problems whenever moving between > madcow-trees and regular trees. Not good. maybe some information how the COW issue is currently addressed in linux-vserver. we are using something called immutable linkage invert or immutable unlink (or hundred other names folks invented ;) but it basically works like this: you create a hardlink of a file for several servers (sometimes to a template, sometimes just between the servers), then set the immutable attribute (which can not be reverted inside a virtual server), and an additional attribute (now called iunlink) which permits the user to unlink such an otherwise immutable hardlink reference ... this is sufficient for most package updates and similar but of course a smart solution (CoW*) would be appreciated ... btw, the process of identifying identical files and combining them into an immutable but unlinkable hard reference is (here) called unification, and is done by some userspace tools ... > A real cowlink patch is started but still quite ugly. It's a bit > embarrasing, but if people don't care and want to test it anyway, > feedback is always welcome. I'll try to add some design details to > the webpage soon. > So if anyone want to participate in any way - coding, testing, > discussion, userspace programs, documentation, whatever - please let > me know. Help is always appreciated. I'm willing to help where it is required, as much as my time permits ... best, Herbert > Oh yes, the web page is here: > http://wohnheim.fh-wedel.de/~joern/cowlink/ > > Jörn > > -- > Schrödinger's cat is <BLINK>not</BLINK> dead. > -- Illiad > _______________________________________________ > Vserver mailing list > [EMAIL PROTECTED] > http://list.linux-vserver.org/mailman/listinfo/vserver _______________________________________________ Vserver mailing list [EMAIL PROTECTED] http://list.linux-vserver.org/mailman/listinfo/vserver
