Hi,
Is there a way to convince DFDSS to dump from multiple target volumes in
any simple way where DFDSS picks the volumes to a single output tape to
speed things up? I looked through the Reference Guide and nothing
jumped out. I have FDR/FDRDSF so Bruce feel free to chime in with a
comparison if you think I could have done better.
I needed to backup 1400 SVC dumps (compressed PS-E) total about 20
million tracks across 276 volumes and then I deleted all but two. I
didn't know if I might later need one of the many and the outage had
impacted our highest availability LPAR so I didn't want to throw any doc
away. DAE wasn't doing much for these abends and while I had already
worked with the first and last dumps I knew I might need to revisit
something that happened in the middle.
I thought about just doing an HMIGRATE my.svc.dump.date.** to ML2 but
figured it would be better to dump all this directly onto a few high
capacity tapes I could scratch when I was sure I didn't need them. The
UNIT and DATACLAS put this to 3592 tapes so I only needed 3 output
tapes.
//DFDSSCPY EXEC PGM=ADRDSSU
//SYSPRINT DD SYSOUT=*
//TO1 DD DISP=(NEW,CATLG,DELETE),
// UNIT=TAP18,DATACLAS=T3592L1,VOL=(,,,59),
// DSN=DSS.ASYS.SDUMP.D060611.BACKUP,LABEL=RETPD=365
//SYSIN DD *
DUMP DATASET( -
INCLUDE(DSS.%SYS.*.D060611.**)) -
ALLDATA(*) -
OUTDDNAME(TO1)
This took about 742 minutes (all night) and processed each volume on
which data sets were found sequentially.
Is there anything I can do with DFDSS that would have significantly
improved the elapsed time? Any way to automatically process multiple
input volumes at the same time? The key is I don't want to code a
list of volumes by hand that was not feasible in this case and most of
the time it isn't. I guess I could write a little REXX using CSI to
build DFDSS JCL but I would prefer the dump utility handle the
parallelism itself.
Best Regards,
Sam Knutson, GEICO
Performance and Availability Management
mailto:[EMAIL PROTECTED]
(office) 301.986.3574
There's nothing new under the sun, but there are lots of old things we
don't know.
Ambrose Bierce
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