Port Usage Test

This test provides information on I/O rates for all the host bus adapters connected to each Storage unit Port.

Target of the test : A Hitachi USP storage device

Agent deploying the test : A remote agent

Outputs of the test : One set of results for every port on the Hitachi USP device monitored.

Configurable parameters for the test
Parameter Description

Test Period

How often should the test be executed.

Host

The IP address of the host for which this test is to be configured.

Port

The port at which the specified host is listening. By default, this is set to NULL.

UserID, Password and Confirm password

The test should be configured with the credentials of a special user account, which is specifically created for use with the export utility; this account should fulfill the following conditions:

  • Should not possess the ‘write’ permission;
  • Can be of any user type; however, to ensure that the eG agent collects statistics pertaining to all storage partitions, it is recommended that this user is of type storage administrator;

Provide the credentials of this user against the UserID and Password parameters. Confirm the password by retyping it in the Confirm Password text box.

Timeout

Specify the duration (in seconds) within which the SNMP query executed by this test should time out in this text box. The default is 3 seconds.

Measurements made by the test
Measurement Description Measurement Unit Interpretation

I/O operations rate

Indicates the rate at which read-write operations are performed on this port.

IOPS

A high value of this measure is generally indicative of high I/O activity on a port. Comparing the value of this measure across ports will enable you to isolate busy ports, and detect load imbalances.

Data traffic

Indicates the rate at which data is transferred over this port.

 

KB/Sec

 

Response time

Indicates the responsiveness of this port to read-write requests.

Microseconds

Ideally, the value of this measure should be low. If the value of this measure is very high or is increasing steadily, then, you might want to check whether the I/O operations rate measure too reports a high value. If so, it is a clear indication that since the I/O activity is high, the hosts are taking a longer time to access the disks, thereby increasing the response time.