Radoslaw
I agree that you wouldn't do this in production, but it is a perfectly valid
way to measure the throughput of a host channel.
Besides fanning out through an 8Gb switch to multiple FICON blades or
storage controllers, I would also suggest that you make sure the other port
on the 8S chann
W dniu 2012-03-07 16:52, Martin Packer pisze:
Perhaps one would expect HMC and RMF to source from the same place. Tell
me if I'm wrong, this not being my area.
1. I added an emoticon to my answer - that's becuase both sources showed
100%, although I really used HMC Activity Monitor.
2. HMC and
Perhaps one would expect HMC and RMF to source from the same place. Tell
me if I'm wrong, this not being my area.
Cheers, Martin
Martin Packer,
Mainframe Performance Consultant, zChampion
Worldwide Banking Center of Excellence, IBM
+44-7802-245-584
email: martin_pac...@uk.ibm.com
Twitter / Fa
IBM-MAIN@bama.ua.edu
> Subject: Re: [IBM-MAIN] FICON channel utilization
>
> W dniu 2012-03-07 12:49, Ron Hawkins pisze:
> > Radoslaw,
> >
> > Actually RMF does not report channel utilization for FICON. It is
> > showing you microprocessor busy on the host channe
W dniu 2012-03-07 12:49, Ron Hawkins pisze:
Radoslaw,
Actually RMF does not report channel utilization for FICON. It is showing
you microprocessor busy on the host channel board.
Did I say RMF? :-)
I observed the utilisation on HMC. However AFAIK RMF showed similar data.
For the same MB/sec
Cathy's techpaper:
IBM zEnterprise 196 and IBM zEnterprise 114 I/O and FICON Express8S Channel
Performance (Cathy Cronin, Version 2, November 2011) (ZSW03196USEN01)
http://public.dhe.ibm.com/common/ssi/ecm/en/zsw03196usen/ZSW03196USEN.PDF
On Wed, Mar 7, 2012 at 12:49 PM, Ron Hawkins wrote:
Radoslaw,
Actually RMF does not report channel utilization for FICON. It is showing
you microprocessor busy on the host channel board.
For the same MB/sec this metric will change depending on block size, data
length and whether zHPF is used.
You can quite easily saturate a host channel MP with
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