GemFire Disk Test

This test auto-discovers the disks on the target GemFire Cluster and for each disk, this test reports the rate at which data is read from and written to the disk and the time taken to flush the data into each disk. Using this test, administrators can identify the error-prone disks that may fail any time and be alerted to potential disk failures. In addition, this test points administrators to the disk from which the maximum amount of data is utilized.

Target of the test : A GemFire Cluster

Agent deploying the test : An internal/remote agent.

Outputs of the test : One set of results for each disk of the target GemFire Cluster being monitored.

Configurable parameters for the test
Parameters Description

Test Period

How often should the test be executed.


The host for which the test is to be configured.


The port on which the specified host listens. By default, this is 7070.


Here, specify the port at which the JMX listens for requests from remote hosts. Ensure that you specify the same port that you configured in the file in the <JAVA_HOME>\jre\lib\management folder used by the target application.


The JNDIname is a lookup name for connecting to the JMX connector. By default, this is jmxrmi. If you have registered the JMX connector in the RMI registery using a different lookup name, then you can change this default value to reflect the same. 

JMX User Name and JMX Password

If JMX requires authentication only (but no security), then ensure that the user and password parameters are configured with the credentials of a user with read-write access to JMX. To know how to create this user, refer to Configuring the eG Agent to Support JMX Authentication.

Confirm Password

Confirm the Password by retyping it in this text box.

GemFire Servers

Specify the exact name of the server if the monitored GemFire Cluster belongs to a cluster. By default, this is none.

Measurements made by the test
Measurement Description Measurement Unit Interpretation

Disk flush average latency

Indicates the average time taken to flush the data from this disk.


A high value for this measure is a cause of concern as this may indicate slowness of the disk.

Read rate

Indicates the rate at which data was read from this disk.


Comparing the value of these measures across the disks helps you in identifying the disk that is busy in terms of disk reads and disk writes.

Write rate

Indicates the rate at which data was written to this disk.


Total disk usage

Indicates the total amount of data utilized from this disk.