XIO SSDs Test

This test reports the current health and enabled state of each SSD in an EMC XtremIO, monitors the space utilization of each SSD, and enables administrators to accurately identify which SSD is experiencing space crunch currently. In addition, this test monitors the level of traffic on each SSD, and helps isolate irregularities in load balancing across the SSDs. In the process, the test also helps identify which SSD is experiencing processing bottlenecks (if any).

Target of the test : An EMC XtremIO Storage array

Agent deploying the test : A remote agent

Outputs of the test : One set of results for each Data Protection Group:SSD in the target EMC XtremIO Storage array that is 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 device for which this test is to be configured.

Port

The port number at which the storage array listens. The default is NULL.

XtremIO User and XtremIO Password

Provide the credentials of a user who has read only privileges to access the XtremIO storage array in the XtremIO User and XtremIO Password text boxes.

Confirm Password

Confirm the password by retyping it here.

XMS IP

This parameter is applicable only for EMC XtremIO 4.x. By default, None will be chosen from this list. If the target EMC XtremIO storage array is within a XMS Management Server that is auto-discovered, then the IP or host name of that XMS Management Server will be displayed in this list. Select that particular XMS IP to configure this test. If you wish to monitor an EMC XtremIO Storage Array that is either not an integral part of the auto-discovered XMS Management Server or a brand new EMC XtremIO Storage Array, choose the Other option. This will enable you to add a new XMS Managament Server. To know how to add a new XMS Management Server, refer to Adding a new XMS.

SSL

The eG agent collects performance metrics by invoking Restful APIs on the target Storage array. Typically, the Restful APIs can be invoked through the HTTP or the HTTPS mode. By default, the eG agent invokes the Restful APIs using the HTTPS mode. This is why, the SSL flag is set to Yes by default. If the target storage array is not SSL-enabled, then the Restful APIs can be accessed through the HTTP mode only. In this case, set the SSL flag to No.

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

SSD health state

Indicates the current health of this SSD.

 

The values reported by this measure and their numeric equivalents are available in the table below:

Measure Value Numeric Value
Healthy 0
Unknown 1

Note:

This measure reports the Measure Values listed in the table above to indicate the current health of this SSD. However, in the graph, this measure is indicated using the Numeric Values listed in the above table.

SSD enabled state

Indicates whether/not this SSD is enabled.

 

The values reported by this measure and their numeric equivalents are available in the table below:

Measure Value Numeric Value
Enabled 0
Disabled 1
Unknown 2

Note:

This measure reports the Measure Values listed in the table above to indicate whether/not this SSD is enabled. However, in the graph, this measure is indicated using the Numeric Values listed in the above table.

SSD RG state

Indicates whether/not this SSD is within a Raid Group.

 

The values reported by this measure and their numeric equivalents are available in the table below:

Measure Value Numeric Value
In RG 0
Unknown 1

Note:

This measure reports the Measure Values listed in the table above to indicate whether/not this SSD is within a Raid Group. However, in the graph, this measure is indicated using the Numeric Values listed in the above table.

SSD size

Indicates the total size of this SSD.

GB

 

SSD space in use

Indicates the amount of space that is currently utilized by this SSD.

GB

If the value of this measure is close to that of the SSD size measure, it indicates potential space crunch in the SSD. Administrators are therefore required to increase the size of the SSD.

SSD free space

Indicates the percentage of space that is available for use in this SSD.

Percent

A high value is desired for this measure.

SSD space used

Indicates the percentage of space that is currently in use in this SSD.

Percent

A low value is desired for this measure. A consistent increase in this value could indicate a gradual, but steady erosion of space in this SSD. A value close to 100% indicates that this SSD is rapidly running out of space.

Endurance remaining

Indicates the tolerance i.e., withstanding capability of this SSD, expressed in terms of percentage.

Percent

A high value is desired for this measure. A sudden/gradual decrease in the value indicates an impending SSD failure.

Read bandwidth

Indicates the rate at which data is read from this SSD.

MB/Sec

Comparing the value of these measures across the SSDs will clearly indicate which SSD is the slowest in I/O processing, and when exactly the slowdown occurred – when reading data? or when writing data?

Write bandwidth

Indicates the rate at which data is written to this SSD.

MB/Sec

Bandwidth

Indicates the amount of data handled while performing I/O operations per second on this SSD.

MB/Sec

Compare the value of this measure across the SSDs to identify the SSD that is consuming the maximum bandwidth.

Read IOPS

Indicates the rate at which read operations were performed on this SSD.

IOPS

Ideally, the value of this measure should be high. A steady dip in this measure value could indicate a potential reading bottleneck.

Write IOPS

Indicates the rate at which write operations were performed on this SSD.

IOPS

Ideally, the value of this measure should be high. A steady dip in this measure value could indicate a potential writing bottleneck.

IOPS

Indicates the rate at which I/O operations were performed on this SSD.

IOPS

A high value is desired for this measure. Compare the value of this measure across the SSDs to identify the SSD that is handling the maximum number of I/O operations.