Mark Zelden wrote:
On Tue, 12 Jul 2005 09:57:33 -0700, Edward E. Jaffe
<[EMAIL PROTECTED]> wrote:
Issue the 'f catalog,ecshr(status)' system command to find out if you're
using this important catalog performance enhancement.
After first asking yourself "am I running a parallel sysplex?" and
"am I not sharing catalogs outside the sysplex boundries?".
Neither of which is required to issue the command I suggested.
Certainly true! But a moot point if not running a parallel sysplex
(which I would have at least mentioned or asked first). Someone not
familiar with ECS might not realize that a parallel sysplex is
required to get that important catalog performance enhancement.
I usually leave such trivialities as an exercise for the reader. Indeed,
if one asks for ECSHR(STATUS) on a system that is not part of a parallel
sysplex (or simply doesn't have the structure defined), you will get "CF
Connection: Connect Failure RC: xxxxxxxx RSN: yyyyyyyy". I figured
Gil -- working for STK .. er ... SUN -- probably had some b!tchin'
hardware available -- including coupling facilities.
Speaking of parallel sysplex, I just set one up for testing purposes
using z/VM's "Coupling Facility Simulation" feature which neither uses
nor supports real links to real coupling facilities. Though it loads and
uses the CFCC LIC from the hardware, z/VM prevents CFCC from spinning
without requiring use of the kludgey, stupid, and slow DYNDISP setting.
(Since it virtualizes the CF links themselves, z/VM probably intercepts
the instruction used in the so-called "active wait" polling loop and
suspends CFCC until it detects messages directed to it from the z/OS
guests.)
It's somewhat like ICMF reborn for zSeries processors -- albeit for z/VM
guest use only. Awesome!
--
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| Edward E. Jaffe | |
| Mgr, Research & Development | [EMAIL PROTECTED] |
| Phoenix Software International | Tel: (310) 338-0400 x318 |
| 5200 W Century Blvd, Suite 800 | Fax: (310) 338-0801 |
| Los Angeles, CA 90045 | http://www.phoenixsoftware.com |
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