On 30 Oct 2008 08:08:50 -0700, in bit.listserv.ibm-main you 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. > Given that software generally requires more main memory and disk as time goes on (check requirements for OS390 2.7 versus z/OS v1.10 or Windows NT versus Windows Vista for Business), I don't know about the throughput changes. Web code is not necessarily efficient. I don't think that the z series COBOL compiler has gotten that much more efficient (compiled code can't even take advantage of 64 bit or XPLINK).
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