EMC Unity iSCSI Port Test

Storage ports help the storage processors receive and process I/O requests. By periodically checking the health of the ports and measuring the I/O load on the ports, you can identify overloaded ports, isolate the storage processor they support, and thus proactively detect potential/existing load-balancing irregularities and/or processing bottlenecks with the storage processors. The UnityiSCSITest test facilitates this port check. For every port configured on each of the storage processors (A and B) supported by the target storage system, this test reports the health of the ports, the I/O load on the ports and the processing ability of the ports. In the process, the test not only points administrators to overloaded ports, but also puts a finger on ports that are slow when processing I/O requests.

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: iSCSI port 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

Health state

Indicates the current health of this I/O module.

 

The values reported by this measure and its numeric equivalents are mentioned in the table below:

Measure value Numeric Value
Normal 1
Attention 2
Unknown 3
Degraded/Warning 4
Minor failure 5
Major failure 6
Critical failure 7
Non-recoverable error 8
Unconfigured 0

Note:

By default, this measure reports the Measure Values listed in the table above to indicate the current health of this iSCSI port. The graph of this measure however is represented using the numeric equivalents only - 0 to 8.

The detailed diagnosis of this measure lists the ID, slot, health of the I/O module, model and serial number of the I/O module.

Peak read bandwidth

Indicates the maximum amount of data read through this port per second.

MB/sec

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

Average read bandwidth

Indicates the average amount of data read through this port per second.

MB/sec

 

Peak write bandwidth

Indicates the maximum amount of data written through this port per second.

MB/sec

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

Average write bandwidth

Indicates the average amount of data written through this port per second.

MB/sec

 

Peak read IOPS

Indicates the maximum number of read operations performed through this iSCSI port per second.

IOPS

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

Average read IOPS

Indicates the average number of read operations performed through this iSCSI port per second.

IOPS

 

Peak write IOPS

Indicates the maximum number of write operations performed through this iSCSI port per second.

IOPS

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

Average write IOPS

Indicates the average number of write operations performed through this iSCSI port per second.

IOPS