Fred >...> And sorry if my question confused ...
Unlike Hal Merritt, I wasn't *confused* by the question, only intrigued ... > ... does VTAM compression apply only for SNA traffic or also IP traffic? VTAM provides compression as a service to applications using the VTAM API. Because it is architected within SNA, it is a service which may also be supported by other implementations of SNA. By "IP traffic" I assume you mean applications supported by - these days - the sockets API. This has nothing whatsoever to do with VTAM. Enterprise Extender is a technique whereby the IP network is employed as a logical SNA connection but I don't believe that qualifies as your "IP traffic". I would expect that where you might look for support for compression is in what can be done with individual IP-based applications. Not so long ago in August we had the thread "FTP Question"[1] - not the most imaginative subject line - which involved a discussion of how FTP supported compression. It was concluded - not without some supercilious comments from Mr Gilmartin[2] - that, in essence, what FTP offered as "compression", FTP subcommand COMPRESS[3] or MODE C[4], corresponded to VTAM's level 1 compression, RLE, as described before. Incidentally, I verified these points by using "compression" as a search word in the "Search text" box of the "Communications Server" bookshelf in say the following URL: http://www-03.ibm.com/systems/z/os/zos/bkserv/zshelves13.html Using this technique, I checked also the JES2 bookshelf in order to check on the picture for NJE over IP. It seems that compression is just *not* supported - perhaps yet ... - [1] http://aime.ua.edu/cgi-bin/wa?A1=ind1108&L=ibm-main#97 [2] He may still be picking felt fragments from his teeth! [3] http://publibz.boulder.ibm.com/cgi-bin/bookmgr_OS390/BOOKS/F1A1B9A0/5.14 [4] http://publibz.boulder.ibm.com/cgi-bin/bookmgr_OS390/BOOKS/F1A1B9A0/5.44 - Chris Mason On Thu, 3 Nov 2011 03:19:13 -0500, Fred Schmidt <[email protected]> wrote: >Chris (or anyone)... does VTAM compression apply only for SNA traffic or also >IP traffic? In case you haven't already guessed, I am not a comm's person, so >please excuse my ignorance. > >Regards, Fred ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
