Everything depends on the point of view. "... not usable as intended... ... usually we expect dataset to contain some data... ... no real (as intended) use..." -- some may intend a data set to hold data; others may intend an "empty" data set not to hold data but rather to hold metadata. From the latter point of view, it is working as intended, useful, logical, and also not empty (since it is full of metadata). It's like choosing whether to watch a TV show because one likes it or to change the channel and look for a different show because one thinks the first show is useless. Don't use an empty data set if it's useless or illogical from your point of view.
Bill Fairchild Programmer Rocket Software 408 Chamberlain Park Lane . Franklin, TN 37069-2526 . USA t: +1.617.614.4503 . e: bfairch...@rocketsoftware.com . w: www.rocketsoftware.com -----Original Message----- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of R.S. Sent: Tuesday, August 28, 2012 12:17 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: Space Allocation In Bytes W dniu 2012-08-28 17:59, Roger W. Suhr pisze: > No, it's not illogical. We use Format 1 DSCB entries as model DSCB > for GDG's and other things. No data space use is needed for that, so > we allocate TRK=0. No problem there! Well, it depends on the point of view. Datasets "by definition" are for keeping data, not to make GRS ENQ, not to be DSCB model (BTW: haven't heard anyone about SMS? DATACLASS or even LIKE?). Zero-space dataset is like PDS with zero directory. Possible to create, but not usable as intended. BTW: it's NOT similar to /dev/null or DD DUMMY. Zero-space dataset is real object, consuming real resources (VTOC, maybe catalog) with no real (as intended) use. Of course, as I already said, it's perfectly possible, legal and IBM supported to use such datasets for the purposes as above or maybe others as well. BTW2: Another parallel comes to my mind: IEFBR14. Usually we expect the program to do something. ;-) Usually we expect dataset to contain some data... -- Radoslaw Skorupka Lodz, Poland -- Tre tej wiadomoci moe zawiera informacje prawnie chronione Banku przeznaczone wycznie do uytku subowego adresata. Odbiorc moe by jedynie jej adresat z wyczeniem dostpu osób trzecich. Jeeli nie jeste adresatem niniejszej wiadomoci lub pracownikiem upowanionym do jej przekazania adresatowi, informujemy, e jej rozpowszechnianie, kopiowanie, rozprowadzanie lub inne dziaanie o podobnym charakterze jest prawnie zabronione i moe by karalne. Jeeli otrzymae t wiadomo omykowo, prosimy niezwocznie zawiadomi nadawc wysyajc odpowied oraz trwale usun t wiadomo wczajc w to wszelkie jej kopie wydrukowane lub zapisane na dysku. This e-mail may contain legally privileged information of the Bank and is intended solely for business use of the addressee. This e-mail may only be received by the addressee and may not be disclosed to any third parties. If you are not the intended addressee of this e-mail or the employee authorised to forward it to the addressee, be advised that any dissemination, copying, distribution or any other similar activity is legally prohibited and may be punishable. If you received this e-mail by mistake please advise the sender immediately by using the reply facility in your e-mail software and delete permanently this e-mail including any copies of it either printed or saved to hard drive. BRE Bank SA, 00-950 Warszawa, ul. Senatorska 18, tel. +48 (22) 829 00 00, fax +48 (22) 829 00 33, www.brebank.pl, e-mail: i...@brebank.pl Sd Rejonowy dla m. st. Warszawy XII Wydzia Gospodarczy Krajowego Rejestru Sdowego, nr rejestru przedsibiorców KRS 0000025237, NIP: 526-021-50-88. Wedug stanu na dzie 01.01.2012 r. kapita zakadowy BRE Banku SA (w caoci wpacony) wynosi 168.410.984 zotych. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
