Disk IO Performance Test

This test auto-discovers the physical disks on a server, and accurately points you to the disk that is currently experiencing a high level of I/O activity.

This test is disabled by default. To enable the test, go to the enable / disable tests page using the menu sequence : Agents -> Tests -> Enable/Disable, pick the desired Component type, set Performance as the Test type, choose the test from the DISABLED TESTS list, and click on the << button to move the test to the ENABLED TESTS list. Finally, click the Update button.

Target of the test : A Solaris/Linux/AIX host

Agent deploying the test : An internal agent

Outputs of the test : One set of results for each disk supported by the host

Configurable parameters for the test

Parameter	Description
Test Period	How often should the test be executed.
Host	The host for which the test is to be configured.
Target Disk IO Rate	Specify a positive integer value that represents the highest level of I/O activity (in KB/Sec) that can occur on a disk. If the actual I/O activity reported by this test exceeds the value configured here, the disk is said to be busy.

Measurements made by the test

Measurement	Description	Measurement Unit	Interpretation
Disk IO	Indicates the rate at which I/O reads and writes occur on this disk.	KB/Sec
Disk busy	Indicates the percentage of time for which this disk was busy processing I/O requests.	Percent	This measure is reported only for those disks for which the value of the Disk IO measure is greater than or equal to the TargetdiskIOrate configured. If this measure appears in the eG monitoring console for a disk, it clearly indicates that the said disk is busy. Comparing the percentage of time that the different disks are busy, an administrator can determine whether the application load is properly balanced across the different disks.
Disk I/O at target busy	Indicates whether this disk is busy processing requests or not.	Boolean	If the value of the Disk IO measure is greater than or equal to the TargetdiskIOrate configured for this test, then, this measure will return the value 1; this indicates that the disk is busy. If the value of the Disk IO measure falls below the targetdiskIOrate  that has been configured, then the value of this measure will be 0; this indicates that the disk is not busy.