We have a few small z/OS 1.9 images which have no tape access and use
HSM to backup the data to a 3390 mod 27. Here's the DASD related parms
we use for HSM.
SETSYS USERUNITTABLE(3390)
SETSYS CDSVERSIONBACKUP( -
BACKUPCOPIES(4) -
BACKUPDEVICECATEGORY(DASD) -
BCDSBACKUPDSN(DFHSM.xxxx.BCDS.BACKUP) -
JRNLBACKUPDSN(DFHSM.xxxx.JOURNAL.BACKUP) -
MCDSBACKUPDSN(DFHSM.xxxx.MCDS.BACKUP) -
OCDSBACKUPDSN(DFHSM.xxxx.OCDS.BACKUP) -
DATAMOVER(DSS) -
)
SETSYS COMPACT(DASDBACKUP -
DASDMIGRATE -
NOTAPEBACKUP -
NOTAPEMIGRATE)
SETSYS BACKUP(DASD)
SETSYS DSBACKUP(DASD(TASKS(10)) TAPE(TASKS(0) -
DEMOUNTDELAY(MAXIDLETASKS(0) MINUTES(60))
/*-----------------------------------------------------------*/
/* ADDVOL ENTRIES FOR BACKUP VOLUMES */
/*-----------------------------------------------------------*/
ADDVOL xxxxxx UNIT(3390) BACKUP (DAILY(1))
Terry Traylor
charlesSCHWAB
TIS Mainframe Storage Management
Remedy Queue: tis-hs-mstg
(602) 977-5154
-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On
Behalf Of Bri P
Sent: Monday, October 06, 2008 7:10 AM
To: [email protected]
Subject: HSM DASD Backup volumes
I'm setting up HSM to backup to DASD instead of tape.
I can't figure out how best to set up the disks though; whether to have
a (increasingly?) large number of daily backup volumes like I did with
the tape volumes, or a small amount of daily backup volumes and a
(increasingly?) large number of spill volumes?
If I have a small number of daily backup volumes, how many do I put in
it? Enough to contain just a day's worth of backups? Enough to have one
volume per running backup task?
Are there any performance considerations to take into account? Anything
else to consider?
Thanks in advance
Brian
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