Thanks, I wasn't aware of that. It makes the channel activity displays
much less interesting.
Brian Nielsen
On Thu, 18 Feb 2010 20:12:57 -0500, Raymond Higgs rayhi...@us.ibm.com
wrote:
I wouldn't rely on those System Activity Display numbers with big IOs to
determine channel capacity.
Being that this is a one-time effort, I wouldn't worry too much about
where the bottleneck is because you indicate can't do anything about it
anyway. Better is simply to estimate the amount of time it will take to
some gross level of precision. If you were going to be doing it regularl
y
To
IBMVM@LISTSERV.UARK.EDU
cc
Subject
Re: Channel Contention
Being that this is a one-time effort, I wouldn't worry too much about
where the bottleneck is because you indicate can't do anything about it
anyway. Better is simply to estimate the amount of time it will take
Currently, we have 3 LPARS, 2 support Linux and 1 for TPF testing. The current
disk configuration is
* a boatload of big 3390s (27-32MB) are on the Linux LPARs, These are
connected using 4 Ficon channels. The DDRs will be done from one of the Linux
LPARs. There will be two concurrent
Here are some data points that may help you.
When I run standalone DDR to do a DASD-to-DASD copy within a single ESS
800 connected with 4 FICON channels, each channel is about 3-4% busy as
reported on the HMC channel activity display, and the CPU is about 1%
busy. My quick back of the
AIT Mainframe Technical Support
From: The IBM z/VM Operating System [mailto:ib...@listserv.uark.edu] On Behalf
Of Schuh, Richard
Sent: Wednesday, February 17, 2010 1:14 PM
To: IBMVM@LISTSERV.UARK.EDU
Subject: Channel Contention
Currently, we have 3 LPARS, 2 support Linux and 1 for TPF testing
Sent: Wednesday, February 17, 2010 1:32 PM
To: IBMVM@LISTSERV.UARK.EDU
Subject: Re: Channel Contention
I might be more concerned that the ESCON channels might be a bottle neck.
Some of the factors that will affect the performance on the new DASD would be
the speed of the Ficon channels (2 gig, 4
From: The IBM z/VM Operating System [mailto:ib...@listserv.uark.edu] On Behalf
Of Mike Rydberg
Sent: Wednesday, February 17, 2010 11:58 AM
To: IBMVM@LISTSERV.UARK.EDU
Subject: Re: Channel Contention
Richard,
A couple question:
How is your FICON Switch fabric configured
