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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.
Eric
On 09/22/2010 12:32 PM, Carl Johnson wrote:
> I'm totally against the elimination of competition in the marketplace.
>
> "Brian Vagnoni" <bvagnoni@v-system.net> wrote:
>
>> What do people think about the possibility of VMWare purchasing SUSE from Novell?
>>
>> Sent from my Android phone using TouchDown (www.nitrodesk.com)
>>
>>
>> -----Original Message-----
>> From: Richard Freeman [r-plug@thefreemanclan.net]
>> Received: 9/22/10 10:51 AM
>> To: plug@lists.phillylinux.org [plug@lists.phillylinux.org]
>> 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
>> ___________________________________________________________________________
>> Philadelphia Linux Users Group -- http://www.phillylinux.org
>> Announcements - http://lists.phillylinux.org/mailman/listinfo/plug-announce
>> General Discussion -- http://lists.phillylinux.org/mailman/listinfo/plug
>>
>> ___________________________________________________________________________
>> Philadelphia Linux Users Group -- http://www.phillylinux.org
>> Announcements - http://lists.phillylinux.org/mailman/listinfo/plug-announce
>> General Discussion -- http://lists.phillylinux.org/mailman/listinfo/plug
>
- --
# 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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___________________________________________________________________________
Philadelphia Linux Users Group -- http://www.phillylinux.org
Announcements - http://lists.phillylinux.org/mailman/listinfo/plug-announce
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