OVM Local File System Test

Network Attached Storage – typically NFS – is a commonly used file-based storage system that is very suitable for the installation of Oracle VM storage repositories. Storage repositories contain various categories of resources such as templates, virtual disk images, DVD iso files and virtual machine configuration files, which are all stored as files in the directory structure on the remotely located, attached file system. Since these resources tend to consume space in the file system, administrators will have to closely track how each NFS storage is utilized and proactively detect any potential space shortage. This can be performed using the OVM Local File System test. With the help of this test, the space usage on each file system can be checked and the exact file system that may run out of space very soon.

Target of the test : Oracle VM Manager

Agent deploying the test : A remote agent

Outputs of the test : One set of results for each file system attached to the Oracle VM Server being monitored.

Configurable parameters for the test
Parameter Description

Test period

How often should the test be executed

Host

The host for which the test is to be configured.

Port

The port number at which the specified Host listens to. By default, this will be NULL.

Oracle VM Manager, Oracle VM Manager
User, Oracle VM Manager Password,
and Confirm Password

This test remotely connects to the Oracle VM Manager that manages the monitored Oracle VM Server and uses the web services API of the Oracle VM Manager to pull out metrics of interest. To enable this test to communicate with the web services API, you first need to configure the test with the IP address or host name of the Oracle VM Manager. This can be done using the Oracle VM Manager text box. Then, you need to configure the test with the credentials of a user with Admin rights to the Oracle VM Manager. Use the Oracle VM Manager User and Oracle VM Manager Password parameters to configure these credentials. Finally, confirm the password by retyping it in the Confirm Password text box.

SSL

By default, the Oracle VM Manager is SSL-enabled. Accordingly, the ssl flag is set to Yes by default. This indicates that the eG agent will communicate with the Oracle VM Manager via HTTPS by default.

WebPort

By default,, the Oracle VM Manager listens on 7002. This implies that while monitoring an Oracle VM server via an SSL-enabled Oracle VM Manager, the eG agent, by default, connects to port 7002 of the Oracle VM Manager to pull out metrics. In some environments however, this default port may not apply. In such a case, against the WebPort parameter, you can specify the exact port at which the Oracle VM Manager in your environment listens so that the eG agent communicates with that port.

Measurements made by the test
Measurement Description Measurement Unit Interpretation

File system capacity

Indicates the total capacity of this file system.

MB

 

Free space

Indicates the amount of space in this file system that is still to be used.

MB

A high value is desired for this measure. A consistent drop in this value is indicative of a steady space erosion, which is a cause for concern. Compare the value of this measure across file systems to know which file system is running short of free space.

Used space

Indicates the amount of space used on this file system.

MB

A low value is desired for this measure. Compare the value of this measure across file systems to know which file system has very little

Local file system utilization

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

Percent

A value close to 100% is indicative of excessive usage of file system space. This can significantly degrade the performance of the host operating system.

Is shared file system?

Indicates whether/not this file system is shared.

 

NFS storage is exposed to Oracle VM Servers in the form of shares on the NFS server which are mounted onto the Oracle VM Server's file system. Since mounting an NFS share can be done on any server in the network segment to which NFS is exposed, it is possible not only to share NFS storage between servers of the same pool but also across different server pools.

If an NFS file system is shared between servers of the same/different pools, then the value of this measure is Yes. If the NFS file system is not shared, then the value of this measure is No.

The values that this measure can report and their corresponding numeric values are discussed in the table below:

Measure Value Numeric Value
Yes 1
No 0

Note:

By default, this measure reports one of the values listed under Measure Values to indicate whether/not a file system is shared. In the graph of this measure however, the same is represented using the numeric equivalents only.