NetApp E-Series Storage Disk Workload Test

This test monitors the disks in the target NetApp E-Series Storage system and reports the I/O processing ability of each disk in terms of reads/writes, cache hits, etc. In addition, this test helps the administrators to identify the disk that is taking too long to respond to read/write requests.

Target of the test : NetApp E-Series Storage

Agent deploying the test : A remote agent

Outputs of the test : One set of results for each disk in the NetApp E-Series Storage that is currently launched.

Configurable parameters for the test
Parameters	Description
Test Period	How often should the test be executed.
Host	The nick name of the NetApp E-Series Storage component for which this test is to be configured.
Port	Refers to the port at which the specified host listens to. By default, this is Null.
Rest API Port	This is the port at which REST API connectivity is provided. By default, port 4443 is used.
Username and Password	To collect performance metrics from the target storage device, the eG agent should be configured with the credentials of a user who is vested with "read-only" privileges to access REST API of the target storage device. Specify the credentials of such a user in the Username and Password text boxes.
Confirm Password	Confirm the password by retyping it here.
SSL	Set the SSL flag to Yes, if SSL (Secured Socket Layer) is to be used to connect to the target Storage System, and No if it is not.
Timeout Seconds	Specify the time duration for which this test should wait for a response from the storage system in the Timeout text box. By default, this is 120 seconds.

Measurements made by the test
Measurement	Description	Measurement Unit	Interpretation
Read IOPS	Indicates the rate at which read I/O operations were performed on this disk.	Reads/sec	Compare the values of these measures across the disks to know what is contributing to the abnormal I/O activity levels - read operations? or write operations?
Write IOPS	Indicates the rate at which write I/O operations were performed on this disk.	Writes/sec
Other IOPS	Indicates the rate at which other I/O operations were performed on this disk.	Operations/sec
Read throughput	Indicates the rate at which data was read by this disk.	MB/sec
Write throughput	Indicates the rate at which data was written by this disk.	MB/sec
Read response time	Indicates the time taken for this disk to respond to a read request.	Milliseconds
Write response time	Indicates the time taken for this disk to respond to a write request.	Milliseconds
Average read operation size	Indicates the total size of data read from this controller.	MB
Average write operation size	Indicates the total size of data written on this disk.	MB
Average queue depth	Indicates the average number of outstanding I/O requests to this disk for which a response has not been received from the disk.	Number	A low value is desired for this measure. A high value is indicative of a large number of pending requests for the disk and hints at a potential processing bottleneck on the disk.
Random I/O percentage	Indicates the percentage of random IO operations performed by this disk.	Percent	A high Random I/O percentage indicates workloads that are more likely to stress the system, particularly in terms of IOPS . This is because random access patterns are harder for the storage system to handle compared to sequential ones.
Random data percentage	Indicates the percentage of the data that is accessed by this disk.	Percent	Compare the value of this measure across the disks to identify the disk that had accessed too much data.