eG Monitoring
 

Measures reported by NAUSDNFSIOStatsTest

NFS (Network File System) is a protocol used by Unix system to access data on the storage system.

This test auto-discovers the versions of NFS used on the storage system, and reports the following for each NFS version:

  • The status of the NFS server;
  • Whether all NFS messages have been drained from the NFS queue and the server has been disabled;
  • The rate of read-write requests processed by the NFS server and latencies in I/O processing (if any)

The measures made by this test are as follows:

Measurement Description Measurement Unit Interpretation
is_Enabled Indicates whether the NFS server is currently running in this storage system.   The values reported by this measure and their numeric equivalents are available in the table below:

Numeric Value Measure Value
0 No
1 Yes

Note:

This measure reports the Measure Values listed in the table above to indicate current state of the NFS server. However, in the graph of this measure, the same is indicated using only the Numeric Values listed in the above table.
is_Drained Indicates whether all the NFS messages have been cleared off from the NFS queue and the NFS server has been disabled.   The values reported by this measure and its corresponding numerical equivalents are mentioned in the table below:

Numeric Value Measure Value
0 No
1 Yes

Note:

This measure reports the Measure Values listed in the table above to indicate whether the NFS messages have been cleared off and the NFS server is disabled. However, in the graph of this measure, the same is indicated using only the Numeric Values listed in the above table.

Operations Indicates the total number of NFS operations per second for this NFS version. Ops/sec  
Read_ops Indicates the rate at which the NFS read operations were performed for this NFS version. Ops/sec Very high values for these measures are indicative of the existence of road-blocks to rapid reading/writing by the storage device.

By observing the variations in these measures over time, you can understand whether the latencies are sporadic or consistent. Consistent delays in reading/writing could indicate that there are persistent bottlenecks (if any) in the storage device to speedy I/O processing.

Read_latency Indicates the average time taken for the NFS read operation for this NFS version. Milliseconds
Write_ops Indicates the rate at which the NFS write operations were performed for this NFS version. Ops/sec
Write_latency Indicates the average time taken for the NFS write operation for this NFS version. Milliseconds
Avg_op_latency Indicates the average time taken for any of the NFS operation that has happened for this NFS version. Milliseconds Ideally, the value of this measure should be low. A higher value is an indication of too many NFS messsages waiting in the NFS queue thus leading to a processing bottleneck.