For non-SMS-managed storage, the age at which data sets become
eligible for migration from level 1 to level 2 is the same for all
non-SMS-managed data sets in the system. The MIGRATIONLEVEL1DAYS parameter
of the SETSYS command specifies the minimum time that a data set must
remain unused on the combination of level 0 and level 1 before it
becomes eligible to migrate from level 1 to level 2. For example,
for a MIGRATIONLEVEL1DAYS value of 31, a data set might stay unused
on level 0 for 31 days, or it could stay on level 0 until it is eligible
to migrate to level 1 and reside on level 1 until it was unused for
a total of 31 days. In the example system, the following command is
added to the ARCCMD
xx member in DFSMShsm host
2:
SETSYS MIGRATIONLEVEL1DAYS(60)
(The command is added only in DFSMShsm host 2 because only DFSMShsm
host 2 does automatic level 1 to level 2 migration.)
If you want DFSMShsm to do automatic migration from ML1 to ML2
volumes, you must specify the thresholds of occupancy parameter (of
the ADDVOL command) for the ML1 volumes.