When using a V-VOL, the effective pool capacity must be managed so that it does not become full. Set thresholds for the pool used capacity to manage the remaining capacity in the pool. You can classify the remaining capacity levels in the pool by monitoring with two threshold levels of a warning threshold and a depletion threshold. If the pool used capacity exceeds the threshold, a SIM is output to warn the user and an SNMP trap is reported.
When the used capacity of a pool reaches or exceeds the utilization thresholds set for the pool, you will be alerted so that you can take the appropriate action. A SIM (service information message) is displayed by management software and reported to the hosts.
You can set the following threshold values for each pool:
- Warning threshold: Range = 1% to 100%, in 1% increments. Default = 70%.
- Depletion threshold: Range = 1% and 100%, in 1% increments. Default = 80%. The depletion threshold must be higher than the warning threshold.
The following figure shows a pool with the effective pool capacity of 1,000 GB that has a warning threshold of 50% and a depletion threshold of 80%. If the used capacity of this pool is equal to or greater than 50% (500 GB) of the effective pool capacity (the warning threshold), a SIM is reported. If the used capacity of this pool increases further and is equal to or greater than the depletion threshold (80%), another SIM is reported.