Threshold monitoring is supported for Fibre Channel switch and ETERNUS disk storage systems.
The threshold monitoring functionality sends an alarm or report when Fibre Channel switch or ETERNUS disk storage systems performance value reaches a certain level (threshold value) under certain conditions in daily transaction operations.
The advantage of using the threshold monitoring is that the symptom of Fibre Channel switch or ETERNUS disk storage systems performance drop caused by changes in data processing rates and transaction processing rates can be automatically and reliably detected in daily transaction operations.
The effect that can be expected from the threshold monitoring functionality is that operations in the most suitable environment are enabled. This is accomplished by preventing the adverse effect of performance drops through early detection of bottleneck locations, identification of their causes, and improvement of device configuration.
The threshold monitoring functionality can manage the following information:
Fibre Channel switch
Port throughput (%)
A port throughput value (MB/s) is monitored as the percentage (%) of an allowable tolerance to a maximum transfer capability (MB/s).
ETERNUS disk storage system
Response time (msec) of LUN (OLU)
Average use (busy) rate (%) of RAIDGroup (RLU, LUN_R)
CM load (CPU usage) rate (%)
The threshold monitoring functionality provides the Threshold Monitoring Alarm Log and Condition Report windows.
From all devices monitored by the functionality, the Threshold Monitoring Alarm Log window displays a list of threshold monitoring alarm items detected on individual devices.
The Condition Report window provides the following four windows:
Logical Volume response time error
This is displayed if the Logical Volume response time of a monitored device is found to have reached the state specified in threshold settings. Guidelines for actions to be taken are also displayed.
RAID Group load error
This is displayed if the RAID Group utilization of a monitored device reaches the specified state. Guidelines for actions to be taken are also displayed.
CM load error
This is displayed if the CM load ratio of a monitored device reaches the specified state. Guidelines for actions to be taken are also displayed.
Port throughput load error
It is displayed when the transfer/receive usage rate of port of a monitored device reached the specified state. Measures indicator is also displayed.
Note
The threshold monitoring function is always started when the administrative server is started, and the functionality starts threshold monitoring and obtaining performance information at the same time for a device for which performance management is specified. Accordingly, performance information is obtained and thresholds are monitored regardless of when display of the GUI window starts. To end threshold monitoring, stop threshold monitoring from this software.
For the CM load (CPU usage) rate, the ROE usage rate is not monitored.
