KB IBM is offering a new "z" compression on their TS7700. Similar (I believe) to the z/EDC compression they are doing on their z/OS machines themselves. The advantage of having it in the TS7700 itself is that you are not spending MF mips (or even MF z/EDC mips) on the compression. Rather it is offloaded. And since the z/EDC compression will compress the data before it is replicated; it also cuts down on the amount of TCP/IP traffic for your tape replication. Russell -----Original Message----- From: kekronbekron <000002dee3fcae33-dmarc-requ...@listserv.ua.edu> To: IBM-MAIN@LISTSERV.UA.EDU Sent: Sat, Jul 10, 2021 9:46 am Subject: Re: Report on total tape usage?
Hi Russell, Thanks for the tip on TMETPUSE. I used to use TMEVSNM, and tag on BLKSIZE and BLKCNT, then multiply those 2. The folks at MXG gave me a variant where it'd show compression too; don't have it at hand now. By the new "z" compression, do you mean zlib? - KB ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐ On Saturday, July 10th, 2021 at 7:55 PM, Russell Witt <0000025adb32e6d7-dmarc-requ...@listserv.ua.edu> wrote: > Dave, > > Actually, with CA 1 you had that ability with the supplied EARL report call > TMETPUSE. That EARL report would give you the amount of data actually written > by the application (not just block-count times block-size) and also the > amount of data stored in cache (or physical tape) after compression. That > way, if you wanted to know how much data your applications were creating you > can see that. And if you wanted to know how much data was being stored in > cache you could see that. > > With a lot of applications (DFDSS and FDR to name just two), using > block-count times block-size is rather worthless. DFDSS says it writes 256k > blocks; but in reality they are only about 210k on average. And FDR says they > write 32k blocks; but on average they are 47k in size. And of course, the new > "z" compression that is available on the IBM TS7700 puts the old 4-to-1 > compression ratio of IDRC to shame. I have seen compression ratios in excess > of 99% compression with the new "z" compression. Just amazing. > > So, instead of paying for third-party products to create reports; you should > have simply used the tools that were available to you. > > Russell WittCA 1 Development > > -----Original Message----- > > From: Gibney, Dave gib...@wsu.edu > > To: IBM-MAIN@LISTSERV.UA.EDU > > Sent: Fri, Jul 9, 2021 2:15 pm > > Subject: Re: Report on total tape usage? > > I was using the MXG DAILYDSN stuff with CA-1. Just switched to RMM, and don't > know, but suspect MXG understands it also > > > -----Original Message----- > > > > From: IBM Mainframe Discussion List IBM-MAIN@LISTSERV.UA.EDU On > > > > Behalf Of Longnecker, Dennis > > > > Sent: Friday, July 09, 2021 8:21 AM > > > > To: IBM-MAIN@LISTSERV.UA.EDU > > > > Subject: Report on total tape usage? > > > > I am trying to figure out how much data we actually have backed up on tape. > > > > I have run a few RMM reports, but haven't seen anything much that will just > > > > give me a total number of space used (i.e. 12.4 Terabytes used). Report 11 > > > > seems the closest, but that will take much work to add up all the individual > > > > fields. Anyone have a report, or is there another one already existing that > > > > you can point me to? I'm going to look around in MXG today, but figured > > I'll > > > > check with the group. > > > > Thanks, > > > > Dennis > > > > 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 > > ---------------------------------------------------------------------------------------------------------------------------------------- > > 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 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
