Pure Volume Capacity Test

A volume or logical drive is a single accessible storage area with a single file system, typically (though not necessarily) resident on a single partition of a hard disk. If a volume is over-utilized or is unable to process I/O requests quickly, it can damage the user experience with the entire FlashArray. It is hence the responsibility of the storage administrator to keep an eye out for space contentions and processing bottlenecks with each of the volumes in FlashArray, detect such anomalies even before they occur, and resolve them before users complain. The Pure Volume Capacity test helps the storage administrator discharge his duties efficiently.

This test auto-discovers the volumes on the target FlashArray, and for each volume, this test reports the total capacity, the space availability, the size and the amount of space occupied. This enables administrators to proactively detect a potential slowdown in processing or a probable contention in the volume, identify which volume is contributing to these abnormal phenomena, and intervene to ensure that the problem is resolved before it spirals out of control.

Target of the test : Pure Storage FlashArray

Agent deploying the test : A remote agent

Outputs of the test : One set of results for each volume on the target FlashArray.

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 device listens. By default, this will be NULL.

API Token

The eG agent collects the required metrics from the Pure Storage Flash Array by executing API commands using Pure Storage REST API on the FlashArray and pulls out critical metrics. In order to collect metrics, the eG agent should be provided with a valid API token. To know how to determine the API token, refer to Pre-requisites for Monitoring the Pure Storage FlashArray. Specify the determined API token in the API Token text box.

DD Frequency

Refers to the frequency with which detailed diagnosis measures are to be generated for this test. The default is 2:1. This indicates that, by default, detailed measures will be generated every time this test runs, and also every time the test detects a problem. You can modify this frequency, if you so desire. Also, if you intend to disable the detailed diagnosis capability for this test, you can do so by specifying none against DD frequency.

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

Total capacity

Indicates the total capacity of this volume.

TB

The detailed diagnosis of this measure reveals the details on data reductions performed on each volume.

Used capacity

Indicates the amount of space utilized in this volume.

TB

If the value of this measure is close to the Total Capacity measure, then, it indicates that the volume is running out of space.

Free capacity

Indicates amount of space that is available for use on this volume.

TB

A low value is desired for this measure.

Capacity used

Indicates the percentage of space utilized on this volume.

Percent

Ideally, the value of this measure should be low.

Capacity free

Indicates the percentage of space that is available for use on this volume.

Percent

A high value is desired for this measure.

Volume

Indicates the amount of space allocated for this volume.

TB

Snapshot

Indicates the amount of space allocated for storing the snapshots on this volume.

TB

Shared

Indicates the amount of space allocated for the shared connections on this volume.

TB

System

Indicates the amount of storage space allocated for RAID-3D parity and other metadata on this volume.

TB