The Estimate Report accounts for data sets based on the categories of active
or backup and simulates the management of data sets based on their particular
tape mount management data set categories. See
The Estimate Report for more
information.
- Active
- Data sets are modelled as migrating through the storage hierarchy
once every 24 hours according to the management class keywords LEVEL0AGE and LEVEL1AGE.
Data sets categorized as USAGE(ACTIVE) or
USAGE(SINGLE) are modelled as the tape mount management category of active
for the Estimate Report.
- Backup
- Data sets are modelled as migrating once every 24 hours directly to
migration level 2 from primary DASD after zero days of residency. The Estimate
Report assumes that the data sets migrate every 24 hours, not hourly.
Data sets categorized as USAGE(BACKUP) are modelled as the tape mount management
category of backup for the Estimate Report.
- LARGE
- Data sets whose sizes are greater than or equal to the LARGE keyword
value are modelled as bypassing the tape mount management DASD buffer and
going directly to tape.
Any data sets larger than the LARGE value
are modelled as the tape mount management category of large for the Estimate
Report. Data sets from any usage type can be large depending on their size.
- HSM
- Data sets created by DFSMShsm are modelled as bypassing the tape mount
management DASD buffer and going directly to tape.
Data sets categorized
as USAGE(HSM) are modelled as the tape mount management category of HSM for
the Estimate Report.
- Temporary
- Data sets are modelled as going directly to the tape mount management
DASD buffer for the life of the job and then expiring.
Data sets categorized
as USAGE(TEMP) are modelled as the tape mount management category of temporary
for the Estimate Report.
- Exceptions
- Data sets that remain on tape.
z/OS DFSMS Using the Volume Mount Analyzer
Copyright IBM Corporation 1990, 2014