Pool utilization thresholds

The following threshold values can be set 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.

If either threshold is exceeded by the used capacity of the pool, a service information message (SIM) is issued by the storage system. SIMs are displayed by Device Manager - Storage Navigator and other management software and reported to the open-system hosts as SNMP traps.

The following figure shows a pool with a total pool capacity of 1,000 GB, a Warning Threshold of 50%, and a Depletion Threshold of 80%. If the used capacity of the pool is larger than 50% (500 GB) of the total pool capacity, a SIM and an SNMP trap are reported. If the used capacity of the pool increases further and exceeds the Depletion Threshold (80%), another SIM and SNMP trap are reported.

Note that if the actual pool usage percentage is 50.1%, only 50% appears on the Device Manager - Storage Navigator window because the capacity amount is truncated after the decimal point. If the threshold is set to 50%, a SIM and an SNMP trap are reported even though the pool usage percentage displayed on the window does not indicate an exceeded threshold.

Parent Topic
  • Thresholds for monitoring pools

    Dynamic Provisioning monitors pool capacity using thresholds. A threshold is the proportion (%) of the used capacity of the pool to the total capacity of the pool, or the proportion (%) of the physical used capacity of the pool to the total capacity reserved for writing of the pool.