WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-users

Re: [Xen-users] Re: cow implementation

To: Charles Duffy <cduffy@xxxxxxxxxxx>
Subject: Re: [Xen-users] Re: cow implementation
From: Molle Bestefich <molle.bestefich@xxxxxxxxx>
Date: Tue, 10 Jan 2006 01:00:54 +0100
Cc: xen-users@xxxxxxxxxxxxxxxxxxx
Delivery-date: Tue, 10 Jan 2006 00:07:12 +0000
Domainkey-signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=unCPOQnXi7VGK6q2WmJkSvdSxVZZBWA8TGt3Nw5uTLSJ4qiH/szrTPaBfuiMS6zL5EBVGxkeXvzq11X7QLdu6ZELMGn2LgUF9H/TM24OQxRt2HiceDpfYrSmSaG/ZiR0J2hxgaTvAu6wOsG19+fJg315N36Riwy3z0pvayxwJeI=
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <dpu945$1hc$1@xxxxxxxxxxxxx>
List-help: <mailto:xen-users-request@lists.xensource.com?subject=help>
List-id: Xen user discussion <xen-users.lists.xensource.com>
List-post: <mailto:xen-users@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=unsubscribe>
References: <acb757c00601060251x209356bcr8806d381d44488e8@xxxxxxxxxxxxxx> <43BE4ED9.9050503@xxxxxxxxxxxxxxxxx> <acb757c00601060332k4fc2e1amafa341b519d123eb@xxxxxxxxxxxxxx> <62b0912f0601090253j36578c65m5a4d86c983e6111@xxxxxxxxxxxxxx> <dpu945$1hc$1@xxxxxxxxxxxxx>
Sender: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
Charles Duffy wrote:
> > is the best performer would be very relevant when running multiple
> > instances in virtual machines!
>
> Finding out which one is actually *stable* would be interesting enough
> for me.

Ok, good point :-).

> UnionFS is not enough of a lookalike to be reliably used as a root
> filesystem: /proc/<pid>/exe links point to the underlying filesystems
> (breaking several distributions' tools for checking daemons' status);

There's that 'mount --move blah; pivot $unionfs $unionfs' trick which
should get around that.
I've had absolutely no luck getting that to work though, I'm stuck
getting -EBUSY from pivot_root :-/.

> there's funkiness with mmap;

I'm curious, which?

> and it's quite crash-prone. Granted, I'm
> trying to run a full SuSE image with Oracle on top, so I'm perhaps
> demanding more than some users might -- but in my case, UnionFS is
> simply not stable enough... yet. There's progress being made, though,
> and I'm watching the list.

Gah.
I've used it a lot with SLAX where it seemed stable, and I've just got
Xen up and running with it.  So I'm going to try it out anyway.  Can't
get any worse than LVM snapshots, so I'm hopeful.  I'll probably be
back here in a month, regretting :-).

> mini_fo looks interesting; I'll give that a try.

Cool.  I'll take a look-see too when I get the time.

I'm wondering, have you any verdict over cowloop since you do not mention that?

_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users