Subject: Re: [vserver] Copy-on-write Hard Links, Shared Libraries, Prelink and Memory
From: "Michael S. Zick" <mszick@morethan.org>
Date: Thu, 10 Jun 2010 09:01:28 -0500

On Thu June 10 2010, Gordan Bobic wrote:
> On 06/10/2010 01:53 AM, Herbert Poetzl wrote:
> > On Wed, Jun 09, 2010 at 06:08:27PM +0200, Eugen Leitl wrote:
> >> On Wed, Jun 09, 2010 at 05:01:12PM +0100, Gordan Bobic wrote:
> >>>> Can you cut&   paste the exact rm command you use?
> >
> >>> He did. The find command execs 'rm -f' on all the files it finds that
> >>> have a hard link count of 1. Or am I misunderstanding your question?
> >
> >> Oh, so
> >> find /var/lib/vservers/.hash -type f -links 1 -exec rm -v '{}' ';'
> >
> >> does it for Debian, then. I thought I was missing something.
> >> Below did strike as a bit much space for 253 barebone guests.
> >
> >> beryllium:~# df -k
> >> Filesystem           1K-blocks      Used Available Use% Mounted on
> >> /dev/sda1             73742752  42989868  27006932  62% /
> >
> > this shows me that you do not favor a good design, as
> > putting _everything_ on one partition (including the
> > guests, which might need/want filesystem tagging sooner
> > or later) ...
> 
> Can you please explain exactly what you mean here? What potential issues 
> do you see from guest and host files being on the same file system?
> 

The difference between taking down the host and 253 (paying?) guests with
a single file system failure;
vs
Only taking down one of them (or some small set).

And you aren't even using RAID for storage.  Duh...

Other (should be obvious) reasons.

Mike
> Gordan
> 
>