Eric at on 22 Sep 2010 09:40:30 -0700

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Re: [PLUG] Virtual Side Topic

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I, too, am opposed to the loss of competition.

Having said that, it appears to me that VMWare and SuSE don't compete directly
but instead complement each other.


On 09/22/2010 12:32 PM, Carl Johnson wrote:
> I'm totally against the elimination of competition in the marketplace. 
> "Brian Vagnoni" <> wrote:
>> What do people think about the possibility of VMWare purchasing SUSE from Novell?
>> Sent from my Android phone using TouchDown (
>> -----Original Message-----
>> From: Richard Freeman []
>> Received: 9/22/10 10:51 AM
>> To: []
>> Subject: Re: [PLUG] Need Troubleshooting Advice: Disk Errors in Virtual.Machines
>> On 09/21/2010 06:04 PM, Casey Bralla wrote:
>>> Anybody have any thoughts on what might cause these disk errors, or what I 
>>> might check?
>> Well, I guess we can start by just listing the various possibilities:
>> 1.  Kernel issue in the guest that causes the panic - perhaps no real
>> fault in any lower layer.
>> 2.  Error in the VM code, that causes an apparent disk error to the guest.
>> 3.  Error in the host software (kernel, other processes, etc) that
>> interacts with the VM to manifest itself in a disk error in the guest.
>> 4.  Error in the host hardware that causes a disk error in the guest.
>> Note that host hardware errors could be ANYTHING, since the disk is
>> virtual.  A disk error in the guest might have nothing to do with a
>> physical disk error, unless maybe the guest is directly mapped to a
>> physical disk.
>> RAM errors of course jump to mind as a possibility, perhaps only under
>> load or long uptime (temperature/etc).  Power supply problems could also
>> cause any number of glitches.  The problem could be almost anything.
>> If the host isn't generating any kind of error I tend to doubt that the
>> issue is host software, but you can't rule that out.  Switching to a
>> different platform (xen/etc) would probably address any issue in #2-3
>> above, and perhaps even mitigate #4 (RAM/resource use patterns will be
>> different).
>> These kinds of gremlins can be really hard to track down.  I was having
>> intermitent problems on my server at home, and thought they were fixed.
>> They started coming back right around summer, which made me think heat.
>> This is an older server, and I opened it up and really cleaned out the
>> more sensitive components with compressed air (heat sinks/etc), turned
>> on cpu scaling (to reduce heat generation), and haven't had problems
>> since even with chromium builds.
>> As far as load/etc goes - that clearly can make bugs in the VM or other
>> components more apparent.  However, well-written software should not
>> crash at any level of load - the VM should just be slow.  If the OS
>> panics when you hit a load of 75, then there is a bug in the OS or at a
>> lower layer.  Of course, if you can avoid these kinds of bugs, so much
>> the better.
>> Good luck with it!
>> Rich
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#  Eric Lucas
#                "Oh, I have slipped the surly bond of earth
#                 And danced the skies on laughter-silvered wings...
#                                        -- John Gillespie Magee Jr
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