LH Storage System Test

This test reveals the following critical statistics for the cluster:

CPU and memory utilization;
the rate at which the read and write operations were performed on the cluster;
the rate at which the I/O operations were in pending state;
the time taken by the cluster to complete I/O operations.

Using these metrics, administrators can find out abnormalities, if any, on the cluster at an early stage and prevent the processing bottlenecks.

Target of the test : A Lefthand SAN Cluster

Agent deploying the test : An internal agent

Outputs of the test : One set of results for the storage cluster being monitored.

Configurable parameters for the test
Parameter	Description
Test Period	How often should the test be executed.
Host	The IP address of the host for which this test is to be configured.
Port	The port at which the host is listening.
CLI Path	The eG agent uses the command-line interface, CLIQ.exe, to communicate with and monitor the storage cluster. To enable the eG agent to invoke the CLI, configure the full path to the CLI in the CLI Path text box.
Username and Password	Specify the credentials of a user who can execute the CLIQ.exe on the host that is connected with the storage cluster in the Username and Password text boxes.
Confirm Password	Confirm the password by retyping it here.
Timeout	Specify the duration (in seconds) beyond which the test will timeout in the Timeout text box. The default value is 60 seconds.

Measurements made by the test
Measurement	Description	Measurement Unit	Interpretation
CPU busy	Indicates the percentage of CPU utilized by the storage cluster.	Percent
CPU idle	Indicates the percentage of CPU that is idle on the storage cluster.	Percent
Memory utilization	Indicates the percentage of memory utilized for the storage cluster.	Percent	A low value is preferred for this measure. A high value of this measure indicates a potential space crunch on the cluster.
I/O read rate	Indicates the rate at which read I/O operations were performed on the storage cluster during the last measurement period.	Operations/sec
I/O write rate	Indicates the rate at which write I/O operations were performed on the storage cluster during the last measurement period.	Operations/sec
Total I/O	Indicates the total read and write I/O operations that were performed on the storage cluster during the last measurement period.	Operations/sec
Data read rate	Indicates the rate at which data was read from the storage cluster.	MB/sec
Data write rate	Indicates the rate at which data was written to the storage cluster.	MB/sec
Data processed	Indicates the rate at which data was read from and written to the storage cluster.	MB/sec
Pending I/O operations	Indicates the rate at which the I/O operations were moved to pending state during the last measurement period.	Operations/sec	A low value of preferred for this measure. A high value indicates the processing bottle neck on the cluster.
Read latency	Indicates the time taken to complete read I/O operations on the storage cluster.	Millisec	The values of these measures should be very low. High values indicate that the cluster is taking much time to complete the I/O operations, which may degrade the performance of the cluster.
Write latency	Indicates the time taken to complete write I/O operations on the storage cluster.	Millisec