I looked back at one my lightning fast Mod-27 volume copy jobs and indeed found
ADR806I (001)-T0MI (02), VOLUME vvvvvv WAS COPIED USING A FAST REPLICATION FUNCTION I'm told that this indicates usage of the 'fast copy' microcode, available only when copying within the same DASD subsystem. Once the job began execution, all time stamps show 08.41.54 from start to finish. Now that's what I call fast. . . J.O.Skip Robinson Southern California Edison Company Electric Dragon Team Paddler SHARE MVS Program Co-Manager 323-715-0595 Mobile 626-302-7535 Office [email protected] -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of esmie moo Sent: Monday, December 05, 2016 7:20 AM To: [email protected] Subject: (External):Re: FLASHCOPY QUESTION Good Morning Gentle Readers, Thanks very much for answering my question. All your input has afforded me additional knowledge aboug FLASHCOPY. Robert, I checked your suggestion about looking for ADR806I. It does appear on the output which confirms what you said: ADR806I (001)-T0MI (02), VOLUME SBR000 WAS COPIED USING A FAST REPLICATION FUNCTION. Thanks for the tip. Just to clear up my understanding, does FAST REPLICATION FUNCTION mean the same as FLASHCOPY? Thanks again. -------------------------------------------- On Sun, 12/4/16, Robert2 Gensler <[email protected]> wrote: Subject: Re: FLASHCOPY QUESTION To: [email protected] Received: Sunday, December 4, 2016, 8:37 PM Hi Esmie, DFSMSdss will notify you if FlashCopy was used by issuing an ADR806I in the sysprint output. You do not see any evidence in the sysin because, by default, COPY operations use what is called FastReplication(PREFERRED). There is a FASTREPLICATION keyword on the copy command that has three different sub-parameters. You can read about the details in the manual. FCNC is another parameter that controls how the FlashCopy is made, but it does not control whether or not FlashCopy is used. That is controlled by the FASTREPLICATION keyword (or default). Typically FCNC is used when you are going to dump the target of the FlashCopy to tape and in the course of that DUMP command you withdraw the original relationship with the FCWITHDRAW keyword. Another keyword to investigate using is DEBUG(FRMSG (...)) because if FlashCopy was not used, the DEBUG(FRMSG(...)) specification will control how detailed the returned information is. Thanks, Robert DFSMSdss Architecture and Development Tucson, AZ 1-720-349-5211 [email protected] IBM Mainframe Discussion List <[email protected]> wrote on 12/03/2016 08:58:21 AM: > From: esmie moo <[email protected]> > To: [email protected] > Date: 12/03/2016 09:01 AM > Subject: FLASHCOPY QUESTION > Sent by: IBM Mainframe Discussion List <[email protected]> > > > Gentle Readers, > > I have a question about FLASHCOPY using ADRDSSU and > COPY. In my > first example I was told that the job is using FLASHCOPY. > However I > do not see any evidence. > > COPY FULL INDYNAM (SDB000) OUTDYNAM (MDB000) DUMPCONDITIONING > ADR101I (R/I)-RI01 (01), TASKID 001 HAS BEEN ASSIGNED TO COMMAND 'COPY ' > > From my understanding it is performing a full volume copy of a > source volume. If my understanding of the parm DUMPCONDITIONING is > correct, it (DUMPCONDITIONING) allows to make a copy of the source > volume and while keeping the target volume online. > > I have done a full volume copy of a source to target without the > DUMPCONDITIONING parm and it worked - the volume was fully copied > (see below). Am I missing something? Aren't both examples doing the > same thing? > > COPY INDDNAME(DASD1) OUTDDNAME(DASD2) - > ALLDATA(*) ALLEXCP COPYVOLID PURGE > /* > > However I do not see any evidence of FLASHCOPY being invoked because > the FCNC parm is not present. > > Here is a my second example: > > COPY FULL IDY(PROM70,3390) ODY(SNAP63,3390) DUMPCOND FCNC- > ALLDATA(*) ALLEXCP CANCELERROR PURGE FCTOPPRCPRIMARY - > FCSETGTOK(FAILRELATION) > > In the above example FLASCHOPY is being performed because of the FCNC. > > Could you correct my understanding of all 3 examples? > > Thanks. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
