EVA Host To Array Requests Test

This test monitors the requests flowing from each external host to an array, and helps administrators understand how busy the array is, and which external host is overloading the array.

Target of the test : An EVA Storage Array

Agent deploying the test : A remote agent

Outputs of the test : One set of results for each external host connected to the array.

Configurable parameters for the test
Parameter Description

Test Period

How often should the test be executed.


The host for which the test is to be configured.


Refers to the port used by the EVA SAN device.  By default, it is null.


Specify the full path of the directory in which the evaperf.exe has been installed.


Specify the name of the EVA SAN array that has been configured for monitoring.


This test uses the EVAPerf software component to auto-discover the device ports on an EVA storage array. The EVA Host To Array Requests test on the other hand uses the SSSU console to discover device ports. During auto-discovery, the EVAPerf utility reports the WWN names of the device ports. In contrast, the SSSU console reports the friendly names of the same device ports.

To ensure that device port references are uniform and consistent across tests, you can optionally configure this test to use the SSSU console (instead of EVAPerf) to perform device port discovery. This way, the names of device ports will be the same for this test and the EVA Host to Lun Mapping test. To enable device port discovery via the SSSU console, configure the full path to the location of the SSSU.exe in the SSSULocation text box. If you prefer not to use SSSU.exe for discovering device ports and would rather use the EVAPerf component instead, then, set this parameter to none.

Password and
Confirm Password

To use the SSSU.exe for discovering the friendly names of device ports, specify the user credentials using which the HP EVA array is to be accessed in the Username and Password text boxes. Confirm the password by retyping it in the Confirm Password text box. If you do not wish to use the SSSU.exe, then set these parameters to none


Indicate the duration (in seconds) for which this test should wait for a response from the storage device. By default, this is set to 60 seconds.

Measurements made by the test
Measurement Description Measurement Unit Interpretation

Queue size

Indicates the current number of outstanding requests from this host.


In times of heavy load, you can compare the value of this measure across hosts to accurately identify which host is responsible for the overload.

If the value of this measure grows significantly with time, it could indicate a processing bottleneck on the array, which may require investigation.

Busy responses

Indicates the number of busy responses currently sent to this host.


A busy response is a request transmitted from the array to the host to cease I/O traffic until an internal job queue is reduced.