VSP 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 VSP storage device

Agent deploying the test : A remote agent

Outputs of the test : One set of results for every port on the target Hitachi VSP device being monitored

Configurable parameters for the test
  1. TEST PERIOD - How often should the test be executedHost – The host for which the test is to be configured.
  2. HOST - The host for which the test is to be configured.
  3. PORT - The port at which the device listens. By default, this is set to NULL.

  4. USERID and PASSWORD – To extract metrics from the target storage device, the eG agent should be configured with the credentials of a special user account, which is specifically created for use with the Java export utility. This user 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;

    Specify the credentials of such a user in the USERID and PASSWORD text boxes.

  5. CONFIRM PASSWORD - Confirm the password by retyping it here.
  6. TIMEOUT - Specify the duration (in seconds) beyond which this test should time out in the TIMEOUT text box. The default is 3 seconds.
Measures 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.