I'm inclined to agree with that "thumbnail" evaluation in the last
paragraph. It's like comparing a VW 4-banger to a Rolls Merlyn (From a
P-51 mustang) by the time you consider all the factors involved. Note
that very little was said about "optimizing" the I/O from the Windows
system. RAMAC DASD? It was good for its time, but compared to todays
offerings is like comparing a horse and buggy to the Concord SST.
Can we talk reality here?
----------------------------------------------------------
Dave Reinken wrote:
From: John McKown <[EMAIL PROTECTED]>
They don't say which version of CICS. They don't say which version of COBOL.
But this is likely documented in the actual Redbook They don't take into
account any possible performance enhancements that simply recompile the
original COBOL code using the newest COBOL compiler would get, while
comparing it to the latest NetCOBOL compiled code.
There is some information in the Redbook, and it is _old_. Obviously,
they couldn't have used any compiler newer than the late 90s.
Hardware:
The same OS/390 hardware was used for all the measurement tests
presented in this book. This configuration was a four member OS/390
Parallel
Sysplex, but only two members of this sysplex were used for the
measurement; one to provide a platform for the system under test, and a
second to provide a platform for the network simulation driver (when
using
TPNS). Each sysplex member ran on a single 9672 Central Electronic
Complex (CEC). This configuration comprised:
• A 9672-R55 processor (2GB storage) with 2 Cryptographic Coprocessors
available where noted.
• A 9674-C05 coupling facility (2GB storage)
• Adequate RAMAC DASD to eliminate I/O constraints
For tests needing Web client simulations, either TPNS on OS/390 or the
Compuware QALoad product on two nodes of an SP2 AIX processor was
used.
The network connecting the OS/390 and AIX systems comprised:
• An ATM LAN emulation client (Token Ring) adaptor card on each of the
AIX SP2 nodes
• An ATM (Asynchronous Transfer Mode) network
• An OSA-2 card on the S/390 processor set to operate in TCP/IP
Passthru
Mode to provide token-ring LAN emulation client (LEC) services via the
ATM connection.
Software:
• OS/390 V2.7, including:
- VTAMV4.7
- DFSMS V1.5 (VSAM)
• CICS Transaction Server for OS/390 V1.3
• TPNS V3.5
• WebSphere Application Server V1.1, including:
- IBM HTTP Server V5.1
• OS/390 Java Development Kit V1.1.8
• OS/390 CICS Transaction Gateway V3.1
• Compuware QALoad/QARun software at V4.3
• AIX V4.2.1.0
http://www.redbooks.ibm.com/redbooks/pdfs/sg245748.pdf
Their comparison is completely ridiculous. I'm far from a CICS expert,
but my guess would be that the CWS related components from the late 90s
are _far_ different (and less efficient) than the ones available today.
Or even in this decade, for that matter. In addition to all the other
issues with this extrapolation.
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