Thanks Scott -----Original Message----- From: IBM Mainframe Discussion List <[email protected]> On Behalf Of Scott Chapman Sent: יום ב 01 יולי 2024 14:51 To: [email protected] Subject: Re: Compression in z15-t02
Further clarification from my memory banks: That priced feature is required for the common use cases by the operating system, such as HSM. Those use cases use a method of calling the compression that works via the SAPs to manage calling the hardware instructions. But the underlying hardware instructions can be called directly without using that interface and involving the SAPs. This method likely will use more GP CPU time than the method that requires the priced feature. So if you're writing your own software, at least in theory, you could call the hardware instructions directly. I don't know if any ISV software has done that. Something in my memory says that the Java compression routines call the instructions directly, but I'm not sure about that. Thinking about it, that doesn't align with my memory that those Java routines could utilize zEDC even back when it was a physical card and so had to go through the priced feature interface. But it's also possible that later Java releases changed the methodology of utilizing zEDC. Or it's possible my memory, not being RAIM-protected, has failed in one or more ways. Scott On Sun, 30 Jun 2024 14:47:14 +0000, Mark Jacobs <[email protected]> wrote: >Note that it's a priced feature. > >Mark Jacobs > >Sent from ProtonMail, Swiss-based encrypted email. > >GPG Public Key - >https://api.protonmail.ch/pks/lookup?op=get&search=markjacobs@protonmai >l.com > > >On Sunday, June 30th, 2024 at 10:17 AM, Ed Jaffe ><[email protected]> wrote: > >> On 6/30/2024 5:07 AM, גדי בן אבי wrote: >> >> > Hi, >> > Do I need any software besides base z/OS v2.5 to support compression using >> > to compression accelerator? >> > >> > Gadi >> >> | PRODUCT OWNER('IBM CORP') >> | NAME('Z/OS') >> | FEATURENAME('ZEDC') >> | ID(5650-ZOS) >> | VERSION() >> | RELEASE() >> | MOD(*) >> | STATE(ENABLED) >> >> -- >> Phoenix Software International >> Edward E. Jaffe >> 831 Parkview Drive North >> El Segundo, CA 90245 >> https://www.phoenixsoftware.com/ >> >> >> --------------------------------------------------------------------- >> ----------- This e-mail message, including any attachments, appended >> messages and the information contained therein, is for the sole use >> of the intended recipient(s). If you are not an intended recipient or >> have otherwise received this email message in error, any use, >> dissemination, distribution, review, storage or copying of this >> e-mail message and the information contained therein is strictly >> prohibited. If you are not an intended recipient, please contact the >> sender by reply e-mail and destroy all copies of this email message >> and do not otherwise utilize or retain this email message or any or >> all of the information contained therein. Although this email message >> and any attachments or appended messages are believed to be free of >> any virus or other defect that might affect any computer system into >> which it is received and opened, it is the responsibility of the >> recipient to ensure that it is virus free and no responsibility is >> accepted by the sender for any loss or damage arising in any way from its >> opening or use. >> >> --------------------------------------------------------------------- >> - For IBM-MAIN subscribe / signoff / archive access instructions, >> send email to [email protected] with the message: INFO >> IBM-MAIN > >---------------------------------------------------------------------- >For IBM-MAIN subscribe / signoff / archive access instructions, send >email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
