eG Monitoring
 

Measures reported by OVMMgrFileSysTest

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 OVMMgrFileSysTest 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.

The measures made by this test are as follows:

Measurement Description Measurement Unit Interpretation
Total_capacity Indicates the total capacity of this file system. GB  
Free_space Indicates the amount of space in this file system that is still to be used. GB 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. GB 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 storage space.
Percent_usage 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.
Isshared 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 measre 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.