Thanks for that. We do have IAM here, we’ll open a ticket with BMC asking about support. I was just doubting since it presents to the OS as a VSAM dataset.
We were hoping to make ZEDC “inclusive” as in everyone gets it to reap the space reduction, and job performance improvements and that the OS would decide for us if a particular dataset that has the DATACLAS assigned to it would just ignore, but that wont be the case. I have the ability to code ZEDC_preferred or ZEDC-Required. Required will actually fail the allocation, which I don’t want to either, but I also don’t want to use non-accelerated compression either. So, now as you pointed out, we’ll have to approach ZEDC as “exclusive” and only opt-in file types that are supported like GDG’s for sure. We may roll the dice on all PS, exempting temp datasets and ISPF work datasets, and more as we stumble upon other incompatibilities. With knowing the technical details, I think IBM missed the boat here. ZEDC ought to be a drop-in replacement for compression, period. I can specify COMPACTION YES for VSAM files but ZEDC wont touch them. Why? Dave Jousma Vice President | Director, Technology Engineering From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> on behalf of rpinion865 <0000042a019916dd-dmarc-requ...@listserv.ua.edu> Date: Tuesday, April 16, 2024 at 2:25 PM To: IBM-MAIN@LISTSERV.UA.EDU <IBM-MAIN@LISTSERV.UA.EDU> Subject: Re: Anyone exploiting ZEDC? At my previous life, we were using BMC's IAM VSAM interface. I think IAM could use zEDC. But I was told by then IDP support, that IAM's internal compression was Moe (as in Moe Howard) better than even zEDC. Regarding coding for PS datasets At my previous life, we were using BMC's IAM VSAM interface. I think IAM could use zEDC. But I was told by then IDP support, that IAM's internal compression was Moe (as in Moe Howard) better than even zEDC. Regarding coding for PS datasets opened in/out, I think DAF will show how a PS dataset is being opened. We chose to use zEDC compression for new,catlg,delete GDGs because we were very confident that no one was going to process that combination as in/out. And does not the IBM zBNA tool highlight good candidates? We did not want to clutter up our SMS ACS DC routines with too many actions to put certain PS datasets into zEDC compression. But in the end, we did put certain large PS, not opened in/out, datasets in the ACS DC routine. This e-mail transmission contains information that is confidential and may be privileged. It is intended only for the addressee(s) named above. If you receive this e-mail in error, please do not read, copy or disseminate it in any manner. If you are not the intended recipient, any disclosure, copying, distribution or use of the contents of this information is prohibited. Please reply to the message immediately by informing the sender that the message was misdirected. After replying, please erase it from your computer system. Your assistance in correcting this error is appreciated. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
