Renato, we've not faced this kind of behaviour. Is it generally visible ?
You can look at SMF30 records and find out where the CPU usage is. Counter data and zEDC statistics usage sections could help. Best regards. Massimo <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> Mail priva di virus. www.avast.com <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> Il giorno ven 18 mar 2022 alle ore 18:54 Compagno Renato (Consulente per BCC Sistemi Informatici) <[email protected]> ha scritto: > Hi, > > In our shop we are doing a DR procedure by using DFDSS with ZCOMP: > > > > /DUMP001 EXEC PGM=ADRDSSU,REGION=0M,COND=(0,NE) > > //SYSPRINT DD SYSOUT=* > > //DISCO DD DISP=SHR,UNIT=3390,VOL=SER=xxxxxx > > //N1 DD DSN=FLD0541.DUMPTEST.xxxxxx.ZCOMP, > > // DISP=(,CATLG),LABEL=(001,SL), > > // STORCLAS=SCVTS01B,MGMTCLAS=MCCPEXP, > > // VOL=(,,,100),UNIT=VTSIBM > > //SYSIN DD * > > SET PATCH 0D = FF > > SET PATCH 0E = 3C > > SET PATCH 0F = 0A > > DUMP IDD(DISCO) ODD(N1) OPT(4) ALLDATA(*) ALLEXCP WAIT(15,15) - > > ZCOMP(REQ) > > > > > > > > For the VOLSER Z24RPB (that is a zOS 2.4 resident volume) on Z14 we have > the following statistics: > > 01.23.14 JOB52973 ---- SATURDAY, 29 JAN 2022 ---- > 01.23.15 JOB52973 -JOBNAME STEPNAME PROCSTEP RC EXCP CPU SRB > CLOCK SERV PG PAGE SWAP VIO SWAPS STEPNO > 09.36.58 JOB52973 -PSDRB110 DUMP138 00 25289 .11 .00 > 1.74 326K 0 0 0 0 0 139 > 690 //DUMP138 EXEC PGM=ADRDSSU,REGION=0M,COND=(0,NE) > 691 //SYSPRINT DD SYSOUT=* > 692 //DISCO DD DISP=SHR,UNIT=3390,VOL=SER=$FDEF3 > 693 //N1 DD DSN=DR.DUMP.D220128.T160624.Z24RPB, > // DISP=(,CATLG),LABEL=(001,SL), > // STORCLAS=SCVTS01B,MGMTCLAS=MCCPEXP, > // VOL=(,,,100),UNIT=VTSIBM > 694 //SYSIN DD * > > > > > For the same volume executing the dump on Z15 we have: > > > 01.23.24 JOB01194 ---- WEDNESDAY, 09 FEB 2022 ---- > 01.23.15 JOB52973 -JOBNAME STEPNAME PROCSTEP RC EXCP CPU SRB > CLOCK SERV PG PAGE SWAP VIO SWAPS STEPNO > 06.32.25 JOB01194 -PSDRB112 DUMP139 00 24999 .19 .01 > 1.82 597K 0 0 0 0 0 140 > 695 //DUMP139 EXEC PGM=ADRDSSU,REGION=0M,COND=(0,NE) > 696 //SYSPRINT DD SYSOUT=* > 697 //DISCO DD DISP=SHR,UNIT=3390,VOL=SER=$FDEF1 > 698 //N1 DD DSN=DR.DUMP.D220208.T160612.Z24RPB, > // DISP=(,CATLG),LABEL=(001,SL), > // STORCLAS=SCVTS01B,MGMTCLAS=MCCPEXP, > // VOL=(,,,100),UNIT=VTSIBM > 699 //SYSIN DD * > > > > > > Comparing the two step (don't mind that the two steps are using a > different volser name as input: $FDEF3 and $FDEF1. This is the output of > flashcopy and the content is exactly the same: the resident volume Z24RPB) > > > > Then on Z14 we use 0.11 minutes and on Z15 0.20 minutes for CPU+SRB it > means 82% more CPU time consumption! > > Anyone have an idea as to why such difference? > > > > It is a big difference if you multiply this difference per more than 4000 > devices!!! > > > > > > Please take into account that IBM said: > > In the official web page "Integrated Accelerator for zEnterprise Data > Compression (zEDC)" at > > https://www.ibm.com/support/z-content-solutions/compression/ > > with the statement (right at the top of the page), directly contradicting > your measurements: > > > The Integrated Accelerator for zEDC, available with IBM(r) z15(tm) and > LinuxONE III, reduces the cost of storing, transporting and processing > data. It replaces the zEDC Express adapter with on-chip compression, > providing > increased throughput and capacity: for the z15, up to 8 times faster > application elapsed time with no additional CPU time compared to a z14 with > zEDC Express for compression and decompression * > > > > kind Regards > > Renato > > > > > > > > La presente comunicazione e ogni suo allegato, proveniente da BCC Sistemi > Informatici SpA (appartenente al Gruppo Bancario Cooperativo Iccrea), ? > destinata esclusivamente al soggetto indicato quale destinatario o ad > eventuali altri soggetti autorizzati a riceverla. Essa contiene > informazioni strettamente confidenziali e riservate, la cui comunicazione o > diffusione a terzi ? proibita, salvo che non sia stata espressamente > autorizzata. Se avete ricevuto questa comunicazione per errore, Vi > preghiamo di darne immediata comunicazione al mittente e di distruggere il > contenuto. La informiamo inoltre che l'utilizzo non autorizzato del > messaggio o dei suoi allegati potrebbe costituire reato. BCC Sistemi > Informatici SpA tratta i dati personali in linea con il Regolamento Europeo > 2016/679 (GDPR). Per informazioni pu? consultarsi la sezione "Privacy" sul > sito della societ?. > > ---------------------------------------------------------------------- > 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
