EMC Unity Disk Performance Test

This test monitors the load balancing capability of each disk of the target storage system. Using this test, administrators can pin point the disks that are handling more I/O requests than the rest. This way, irregularities in the distribution of I/O load across disks can be detected at ease and in the process, administrators would be able to fine-tune the load-balancing algorithm. In addition, the test also proactively alerts administrators to probable slowdowns in I/O processing by specific disks, thereby enabling administrators to initiate pre-emptive actions.

Target of the test : An EMC Unity Storage System

Agent deploying the test : A remote agent

Outputs of the test : One set of results for each Storage Processor:Disk combination on the target storage system being monitored.

Configurable parameters for the test
Parameter Description

Test Period

How often should the test be executed.

Host

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

UniSphere CLI Path

The eG agent uses the command-line utility, UEMCli.exe, which is part of the UniSphere Management Suite, to communicate with and monitor the storage device. To enable the eG agent to invoke the CLI, configure the full path to the CLI here.

Username and Password

Provide the credentials of a user possessing 'monitor' role to access the storage system in the Username and Password text boxes.

Confirm Password

Confirm the Password by retyping it in the Confirm Password text box.

Timeout

Specify the duration (in seconds) beyond which this test should time out in the Timeout text box. The default is 300 seconds.

Detailed Diagnosis

To make diagnosis more efficient and accurate, the eG Enterprise suite embeds an optional detailed diagnostic capability. With this capability, the eG agents can be configured to run detailed, more elaborate tests as and when specific problems are detected. To enable the detailed diagnosis capability of this test for a particular server, choose the On option. To disable the capability, click on the Off option.

The option to selectively enable/disable the detailed diagnosis capability will be available only if the following conditions are fulfilled:

  • The eG manager license should allow the detailed diagnosis capability
  • Both the normal and abnormal frequencies configured for the detailed diagnosis measures should not be 0.
Measurements made by the test

Measurement

Description

Measurement Unit

Interpretation

Peak read bandwidth

Indicates the maximum amount of data read from this disk per second.

MB/sec

The detailed diagnosis of this measure lists the VNX time, name of the storage processor and the read bandwidth corresponding to that time.

Average read bandwidth

Indicates the average amount of data read from this disk per second.

MB/sec

 

Peak write bandwidth

Indicates the maximum amount of data written to this disk per second.

MB/sec

The detailed diagnosis of this measure lists the VNX time, name of the storage processor and the write bandwidth corresponding to that time.

Average write bandwidth

Indicates the average amount of data written to this disk per second.

MB/sec

 

Peak read IOPS

Indicates the maximum number of read operations performed on this disk per second.

IOPS

The detailed diagnosis of this measure lists the VNX time, name of the storage processor and the read IOPS corresponding to that time.

Average read IOPS

Indicates the average number of read operations performed on this disk per second.

IOPS

 

Peak write IOPS

Indicates the maximum number of write operations performed on this disk per second.

IOPS

The detailed diagnosis of this measure lists the VNX time, name of the storage processor and the write IOPS corresponding to that time.

Average write IOPS

Indicates the average number of write operations performed on this disk per second.

IOPS

 

Peak total IOPS

Indicates the total number of I/O operations performed on this disk per second.

IOPS

The detailed diagnosis of this measure lists the VNX time, name of the storage processor and the total IOPS corresponding to that time.

Average total IOPS

Indicates the average number of I/O operations performed on this disk per second.

IOPS

 

Peak service time

Indicates the maximum time taken by this disk to service user requests.

Milliseconds

The detailed diagnosis of this measure lists the VNX time, name of the storage processor and request service time.

Average service time

Indicates the average time taken by this disk to service user requests.

Milliseconds

 

Peak response time

Indicates the maximum time taken by this disk to respond to user requests.

Milliseconds

The detailed diagnosis of this measure lists the VNX time, name of the storage processor and the response time for user requests.

Average response time

Indicates the average time taken by this disk to respond to user requests.

Milliseconds