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The Performance Monitoring function includes Real-Time Display of Load Status, Monitoring Overloads, and Statistic
Information Analysis Supporting.
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This function is capable of displaying the latest load state and usage of the disk array and disk array components. The
information is displayed upon the iSM client screen, on the real-time basis. The function, which can monitor
performances of multiple disk array, allows centralized monitoring on the same view of one iSM client. When storage
performance decreases, or symptom of a trouble is seen, use this function to display the performance information of disk
array and disk array components, and identify the cause of decreased performances or a fault.
For details of components composing disk array, refer to 3.3 "Hardware" in the "NEC Storage Manager Manual Guide".
The iSM client screen is capable of displaying the index values for each calculation unit shown in Table 1-1. (Index values
applicable to the items indicated by " " in Table 1-1 are displayed.)
Table 1-1 Available Combinations of Monitored Items and Component types
External I/O Density
External Transfer Rate
External Average Transfer Length
External Average Response Time
Busy Ratio
Read Hit Ratio
Write Hit Ratio
Internal I/O Density
Internal Transfer Rate
Internal Average Transfer Length
Internal Average Response Time
: Item displayed
Displays the latest load status in numerical values
Chapter 1 Overview of Performance Monitoring Function
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Disk Array
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Figure 1-2 Displaying the Numeric Table
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Component type
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Logical Disk
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Physical Disk
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