Re: [OPSAWG] Comments on draft-asai-vmm-mib-05

Dear Jon,

Thank you for your comments.  I'm sorry for replying late but it took some
time to review the objects you proposed.

First of all, I understand that these objects might be useful, especially for
analyzing the performance problems of virtual machines.  However, I
think we need discussion on these objects because they might be
uncommon to the current implementations of hypervisors.  The objects
in the MIB module should be supported by implementation.

I've checked the current implementation of Xen and KVM whether these
are managed and accessible in these hypervisors.  However, as far as I
know, these objects are not accessible through their API.  IMO, these
objects are not commonly-used-measures at this moment, and
consequently, they are not good to be added to the MIB module now.
We might be able to work on updating the MIB module when they are
implemented and commonly used in future.

If you know any hypervisors providing these measures to operators,
I would like you to share the information and let's discuss whether we'd
add them.

Best regards,
Hirochika

On Oct 24, 2013, at 10:08 AM, Saperia Jon <saperia@g.harvard.edu> wrote:

> I thought two additional objects might be of value based on current experience:
> 
> cpuReadyTime - how much time a VM is waiting for CPU resources.  This could be expressed in milliseconds over the past minute.
> 
> storageLatency - a problem that sometimes comes up is that the CPU is available to the VM but due to storage latency work can not continue.  This object will show average storage latency over a short period of time (perhaps 15 seconds).  
> 
> Notifications should be created for these two objects that can be sent when values exceed configurable limits.
> 
> Thank you 
> /jon
> 
> Jon Saperia
> saperia@g.harvard.edu
> Enterprise Architect
> Harvard University Information Technology
> Innovation & Architecture
> (P) (617) 384-6683
> 1350 Mass Ave., room 758
> Cambridge, MA 02138
> 
> 
> 
> 
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-- 
Hirochika Asai <panda@hongo.wide.ad.jp>, The University of Tokyo