CICS: CICS/6000 ISC data conversion
ITEM: RTA000036357
Q: Question:
I have a user who is interested in co-hosting their
mainframe using CICS/VSE with the RISC System/6000 using
CICS/6000. The facilities of CICS ISC can provide more
processing power for their application and we plan to
investigate the possibilities of "shadow files" on the
RS6000 versus DFHCNV macro data conversion for performance
considerations.
Are there any benchmark studies that show how much
processing is added to the mainframe, where the files
currently reside, when VSAM data is converted from EBCIDIC
to ASCII and back to EBCIDIC using ISC?
---------- ---------- ---------- --------- ---------- ----------
R: Response:
I am not aware of any benchmarks done to show the time for
data conversion using DFHCNV macros. The time for
conversion is normally small in relation to the path length
of Function Shipping in CICS, the path length of SNA, and
the time to transmit the data. Data representation between
the RISC System/6000 and ES/9000 for packed and binary data
is the same, so the conversion necessary would be to turn
the character data from EBCDIC to ASCII (and vise versa).
The number of fields and their length would affect the
conversion time also.
When doing conversion in a CICS environment, the resource
owner does the conversion. In your environment, since you
will be having CICS/VSE own the VSAM files, CICS/VSE will be
doing the conversion. DFHCNV macros that specify how
CICS/VSE, CICS/MVS, or CICS/ESA should do the conversion are
documented in SC33-0736 Communicating with CICS OS/2 or
SC33-0616 CICS OS/2 System and Application Guide V1.20 (CICS
OS/2 was the first CICS that caused the need for DFHCNV
macros so that is why they are documented in CICS OS/2
manuals).
Conversion templates for CICS/6000 are also done with DFHCNV
macros. DFHCNV macros are prepared differently on CICS/6000
than they are on the mainframe. DFHCNV macros and their
preparation for a CICS/6000 environment is documented in
SC33-0931 AIX CICS/6000 Customization and Operation. The
CICS/6000 conversion process used the AIX iconv function.
---------- ---------- ---------- --------- ---------- ----------
*====================================================*
| This entry has been edited for Library/INFO status.|
*====================================================*
DW ( upgrader: D73FA09
---------- ---------- ---------- --------- ---------- ----------
This item was created from library item Q647324 CMXFR
Additional search words:
CICS CICS6000 CMXFR CONVERSION CONVERT DASYS DATA DEC93 DW ISC 6000
WWQA: ITEM: RTA000036357 ITEM: RTA000036357
Dated: 11/1996 Category: KIX6000
This HTML file was generated 99/06/24~12:43:13
Comments or suggestions?
Contact us