Sequential datasets that they are updated in place cannot be compressed. That would apply to zEDC or SMS compression.
-----Original Message----- From: IBM Mainframe Discussion List <[email protected]> On Behalf Of Scott Barry Sent: Thursday, January 13, 2022 4:10 PM To: [email protected] Subject: Re: zEDC Justification documents or links [External Email. Exercise caution when clicking links or opening attachments.] On Thu, 13 Jan 2022 19:02:16 +0000, Richards, Robert B. (CTR) <[email protected]> wrote: >Thanks for the additional information. I'll file it away if we get a z15. On a >z14_ZR1 at the moment. > >-----Original Message----- >From: IBM Mainframe Discussion List <[email protected]> On >Behalf Of Scott Barry >Sent: Thursday, January 13, 2022 1:56 PM >To: [email protected] >Subject: Re: zEDC Justification documents or links > >On Thu, 13 Jan 2022 16:57:40 +0000, Richards, Robert B. (CTR) ><[email protected]> wrote: > >>Anyone have some good links to share that will state why zEDC is worth >>licensing and getting? 😊 >> >>For the record, we already have the HW feature installed. Don’t ask. >><sigh> > >Consider with the IBM z15, there is no longer any "license requirement" for >activation - no longer implemented with (z14, z13) hardware PCIe cards >(recommended: at least 4 per CPC/CEC) involved, as the function is on-chip. >And the performance measurement moves from RMF 74 subtype 9 to subtype 10; >also, some of the SMF 30 metrics are zeroed-out as no longer relevant. > >Scott Barry >SBBTech LLC > Additional technical information about zEDC has been reported over-time in the Watson & Walker Tuning Newsletters, such as 2016-4. Also, explore past SHARE presentations (e.g., circa Anaheim 2014). Savings opportunities abound (e.g., SMF compression 8-to-1 within LOGSTREAM and offloaded to DASD), with mgmt areas like SMF (LOGSTREAMs), z/OS sequential (DASD-output - look to convert z/OS COMPACTION leverage zEDC, using new SMS DATACLAS like DCZEDCPR) datasets, DFHSM (data migration/backup-copy), DFDSS (ADRDSSU - consider ZAP to use ZCOMPRESS activated by-default); also, ISVs with FDR (config setting ZEDC=YES), PKZIP (also config setting for global use), IBM/Sterling Connect:Direct, XCOM; also with MQ logging, and beyond z/OS with JAVA (Z-deployment) and zlib. Also, look to zBNA tool for dataset candidate identification - not limited to DASD, but also consider tape-to-DASD migration with zEDC as justification-point. You will need/want to gather z/OS performance metrics / reporting setup in order to keep tabs on zEDC card-performance with utilization, queueing, and also to consider opportunity to stagger some "time-period demand", such as SMF LOGSTREAM offloading processes, so as not over-tax PCIe card utilization. Scott Barry SBBTech LLC ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN Confidentiality notice: This e-mail message, including any attachments, may contain legally privileged and/or confidential information. If you are not the intended recipient(s), or the employee or agent responsible for delivery of this message to the intended recipient(s), you are hereby notified that any dissemination, distribution, or copying of this e-mail message is strictly prohibited. If you have received this message in error, please immediately notify the sender and delete this e-mail message from your computer. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
