On Sat, 10 Apr 2021 17:48:52 +0000, Farley, Peter x23353 <peter.far...@broadridge.com> wrote:
>Just a question of curiosity: Is it possible to tell if zEDC compression is >active for an LPAR or for a particular DASD pool? Perhaps an ISMF screen? > >I know how to check with LISTCAT whether a file WAS compressed via zEDC, but I >would like to know how to tell whether or not it WILL be used when creating a >new file in a given DASD pool. > >Peter >-- > >This message and any attachments are intended only for the use of the >addressee and may contain information that is privileged and confidential. If >the reader of the message is not the intended recipient or an authorized >representative of the intended recipient, you are hereby notified that any >dissemination of this communication is strictly prohibited. If you have >received this communication in error, please notify us immediately by e-mail >and delete the message and any attachments from your system. Some technical considerations these days with zEDC exploitation: - Different for z15 (Accelerator facility, on-chip) vs z14 (PCIe) and earlier; z14 and earlier requires PARMLIB(IFAPRDxx) license-authorization. - z14 and earlier: D IQP command - SMS-accessible, using a suitably-defined DATACLAS, with COMPACTION attribute for zEDC. - SMF LOGSTREAMs, using SMFPRMxx and COMPRESS(…) parameter, also PERMFIX. - API-accessible, such as zlib (e.g., PKZIP, FDR, MQ, Java, Connect-Direct, others?) - consider function/request zlibVersion which returns sub-string “zEDC” when available, up thru z14 as I understand ? - IGDSMSxx, COMPRESS parameter ? IQPPRMxx ZEDC parameter, up thru z14 ? - Additional considerations, such as SAF FACILITY resource access (z14 and lower, no longer required starting with z15), such as FPZ.ACCELERATOR.COMPRESSION Scott Barry SBBTech LLC ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
