On Friday, 02/01/2008 at 11:43 EST, Warren Taylor
<[EMAIL PROTECTED]> wrote:
> I should probably mention that my OS is not even VM. Someone said
"here's your
> vm userid" and "something something linux". Bring it up and use it as a
support
> tool. I got it all up and it works but the whole idea was to use it as a

> database server, which also works but its *painfully* slow.
>
> Perhaps someone knows of some specific documentation. I've searched on
"NFS
> performance on LInux under VM for the complete Idiot" but so far haven't
found
> anything. I joke, but its not really that far from the truth. So if it
is
> possible to be more detailed in your suggestions, this idiot would
appreciate
> it.

You moved from "science" (getting it to work) to "art" (getting it to work
well).

The first suggestion is that you cannot solve this problem by yourself.
The VM systems programmer must assist you.  That means s/he will need to
find out if your VM userid is being starved for resources.  You can't
figure that out for yourself from within the virtual machine.  (There's
some of the Heisenberg Uncertainty Principle involved.  Sorry, Radio Shack
is all out of Compensators.)

When I'm not a security guy, I'm a network guy, so my second suggestion
would be to get a network sniffer trace to find out who is waiting on
whom, and whether it is related to an application request or to the guest
or the network as a whole.  But, again, you can't really do that yourself.
 I mean, you can gather tcpdump data and look at it, but it may not give
you an accurate picture of what's going on.

Use a "divide and conquer" methodology.

Alan Altmark
z/VM Development
IBM Endicott

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