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storage pool, selecting a threshold to trigger reclamation. Then you would wait
for a period of time, and run another update stgpool command to reset the
reclamation threshold to its previous value. You can still use the two-step update
storage pool method, but the reclaim stgpool command is preferred.
The reclaim stgpool command takes a number of options. To set the reclamation
threshold, set the THreshold parameter to a value between 50 and 99. The
THReshold value represents the percentage of reclaimable space required on a
volume, in order for it to be eligible to be reclaimed. To check the amount of
reclaimable space on a volume, run a query volume command. Subtract the value
in the Pct Utilized column from 100 to obtain the percentage of reclaimable
space on the volume. The other parameter required for reclaim stgpool is the
DUration parameter. DUration is the length of time reclamation will run for on the
selected storage pool.
Each sequential storage pool should have one schedule to perform reclamation.
We have three sequential storage pools in our recommended configuration.
Example 12-10 shows three schedules to perform the reclamations. We
specified a threshold of 85 so that only volumes with 15% or less utilization of
valid data will be reclaimed in this operation.
Example 12-10 Defining reclamation schedules
tsm: LOCHNESS_SERVER1>
description="Perform reclamation on the OFFDIRS storage pool" cmd="reclaim stgpool
offdirs threshold=85 duration=60" starttime=11:00 active=yes
ANR2577I Schedule RECLAIM_OFFDIRS defined.
tsm: LOCHNESS_SERVER1>
description="Perform reclamation on the OFFDATA storage pool" cmd="reclaim stgpool
offdata threshold=85 duration=180" starttime=12:00 active=yes
ANR2577I Schedule RECLAIM_OFFDATA defined.
tsm: LOCHNESS_SERVER1>
description="Perform reclamation on the TAPEDATA storage pool" cmd="reclaim
stgpool tapedata threshold=85 duration=180" starttime=15:00 active=yes
ANR2577I Schedule RECLAIM_TAPEDATA defined.
tsm: LOCHNESS_SERVER1>
* Schedule Name
- ----------------
RECLAIM_OFFDATA
RECLAIM_OFFDIRS
RECLAIM_TAPEDATA
384
IBM Tivoli Storage Manager Implementation Guide
define schedule RECLAIM_OFFDIRS type=admin
define schedule RECLAIM_OFFDATA type=admin
define schedule RECLAIM_TAPEDATA type=admin
q sched reclaim* t=a
Start Date/Time
Duration
--------------------
--------
02/21/2006 12:00:00
02/21/2006 11:00:00
02/21/2006 15:00:00
Period
Day
------
---
1 H
1 D
Any
1 H
1 D
Any
1 H
1 D
Any
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