I agree. My definition of "minor change" is a change that does not affect the application's logical view of the file as seen through its access methods. Some types of change might be "minor" for one application, whereas the same type of change for a different application would be catastrophic. Of course, I need to understand how the application accesses its files, in order to succesfully make these kinds of "minor changes". So I would love it if I could use HSM recall to do that.
I can remember a stone-age application that required its master file to be a specific size on a particular volume at specific location on that volume. Hopefully, all applcations like that are long dead and gone. Nowdays, most (but not all) applications are written to be independent of the CISZ or BLKSIZE, therefore changing the CISZ or BLKSIZE makes no logical difference to the application. For an application that uses standard access methods, even changing the file from non-EA to EA should make no logical difference. -----Original Message----- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On Behalf Of R.S. Sent: Wednesday, January 09, 2013 5:53 PM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: ESDS extent ... W dniu 2013-01-09 22:53, Don Williams pisze: > The HSM manuals do not clearly state that the objective of HSM is to > re-create the dataset as it was previously created. For example, with > the right options a HSM recall can convert a SMS-managed data set to > non-SMS-managed and vice versa (with some restrictions, of course). I > agree that some changes like making the LRECL smaller or converting > from/to EBCDIC to/from ASCII would destory data. However, HSM could be > designed to perform useful minor format changes during a recall. I > would love it, if HSM had recall options to change the primary and > secondary allocation quanities, non-EA to EA, change blksize or cisize, etc. Well, it depends on definition of "minor change". ExtFmt, CISZ, BLKSIZE are NOT minor changes in my understanding because they change format of *existing* data. There are aplications CISZ or BLKSIZE dependent, Ext Fmt *is* physically different, etc. SMS-managed or not does not affect the data itself. -- 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 01.01.2013 r. kapita zakadowy BRE Banku SA (w caoci wpacony) wynosi 168.555.904 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
