I promised to summarize results here. Here you go. Hope this formats
adequately. All storage quantities are in MB. "A/S" is address spaces;
"CSA/AS" is ECSA to address space ratio (MB/address space). "Threshold" is
whatever was stated about "what ECSA requirement would make you raise your
eyebrows?" The last line is the arithmetic mean of the column.
A couple of people thought number of address spaces was a dumb thing to be
asking but if you look, the ratios are pretty consistent: most fall between
.8MB and 1.5MB per address space.
ECSA A/S CSA/AS Threshold Comments
92 113 0.81 10-100MB
120 140 0.86 4.8MB ("4%") "Small shop"
140 Not stated "I can accept 200MB"
150 200 0.75 5MB "Small shop"
200 133 1.50 10-100MB
200 145 1.38 10-100MB
250 150 1.67 "No thoughts" "Small shop"
250 150 1.67 No comment
250 400 0.63 No comment
262 214 1.22 10-100MB
304 Not stated "Would look hard at any; could accept up to
3 digits"
750 Not stated No comment
------------------
247 183 1.17
Thanks, all!
Charles
-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[email protected]] On
Behalf Of Charles Mills
Sent: Saturday, June 28, 2014 12:30 PM
To: [email protected]
Subject: ECSA Survey
Would people be kind enough to give me some input that I could use for a
product design decision?
I am addressing these questions primarily to currently active z/OS sysprogs
(or recently active z/OS sysprogs).
Feel free to reply privately if you feel bashful. charlesm at mcn dot org. I
will summarize all results here.
1. How much Extended (above the line) CSA do you have configured in the
IEASYSxx CSA "b" value for your production LPARs?
2. To help me normalize the answers to question 1, roughly how many address
spaces do you have configured on those production LPARs?
3. If you were looking at a vendor product, how much ECSA requirement would
make you raise your eyebrows? Surely 100 bytes would be OK. At roughly what
number would you go "Whoa! Wait a minute. Really? You need how much ECSA?"
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