Performance issues: Netware on ESX

I'm confused by hit-and-miss performance with NW6.5.8 on ESX 4.0.

I'm trying to virtualize most of my servers this summer, and have been
running various editions of VMW for years.  I've heard about
incompatibilities with ESX, Netware and NSS volumes on iSCSI storage,
but the first few VM's I built ran well.

Now it's about a 50-50 shot:  some servers run well, while others using
the same hardware and resource pools do not.  (it's not just disk I/O -
even the console is sluggish)

ESX itself doesn't seem to detect any issues.  Util is low, tools are
loaded etc.

This morning I moved a VM from the iSCSI SAN to local storage.  If
there was any performance gain, it's marginal.

These servers are on new Dell blades running the latest ESX 4.  I have
ESXi 4.0 on older equipment attached to a Fibre Channel SAN, and the
performance of those VM's matches or exceeds the best of those on the
new equipment.

Can anyone explain why one virtual server runs great, but the next one
can barely load Monitor?


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wwcsd
7/15/2010 3:56:02 PM
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wwcsd,

> Can anyone explain why one virtual server runs great, but the next one
> can barely load Monitor?

One thing I've found can make a big difference to performance is setting 
a memory reservation on the VM equal to the memory assigned to it - 
NetWare really doesn't like having it's memory ballooned or swapped.

H.
0
Haitch
7/15/2010 5:27:40 PM
Hspeirs;1999314 Wrote: 
> wwcsd,
> 
> > Can anyone explain why one virtual server runs great, but the next
> one
> > can barely load Monitor?
> 
> One thing I've found can make a big difference to performance is
> setting
> a memory reservation on the VM equal to the memory assigned to it -
> NetWare really doesn't like having it's memory ballooned or swapped.
> 
> H.

Interesting...  My worst-performing VM happens to have the most amount
of RAM allocated, with no reservation.  I'll make some adjustments.


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0
wwcsd
7/15/2010 6:36:01 PM
That did it.  Thanks Hspeirs.   I owe you one!


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0
wwcsd
7/15/2010 7:36:01 PM
Reply:

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