Performance Unity file system

Hello Solmil,

The internal I/O request are tasks that your unity system does in the background that generates I/O.  These can be tasks link cleaning up old snapshots that are past retention periods, is data reduction configured and running, are you using deduplication, etc.  With file system I/O, you will have I/O even if there is no data on the system and you unity is powered on, and waiting to be configured.

In the context of Unity, the File System IOPS and File System Client IOPS are performance metrics related to input/output (I/O) operations on the file system. Here's an explanation of the difference between the two:

1. File System IOPS (Internal I/O requests): This metric represents the total number of internal I/O requests, measured in I/O operations per second (IOPS), for the selected file systems. Internal I/O requests refer to the I/O operations initiated within the Unity system itself. These requests are generated when the Unity system interacts with the file system to perform tasks such as reading or writing data, accessing metadata, or managing file operations internally.

2. File System Client IOPS: This metric represents the total number of file system client I/O requests, also measured in IOPS, for the selected file system. File system client I/O requests are generated by external clients or processes accessing the file system. These requests come from applications or services running on client devices or systems connected to the Unity system. Examples of client I/O requests include file reads, writes, deletes, or any other file system operations requested by external users or applications.

The purpose of measuring both File System IOPS and File System Client IOPS is to gain insights into the overall I/O performance of the Unity system and understand the distribution of I/O requests. By monitoring these metrics, you can analyze the workload and identify potential bottlenecks or performance issues. Comparing the internal I/O requests (File System IOPS) with the client-generated I/O requests (File System Client IOPS) helps in understanding the relative contribution of internal processes versus external client activity to the overall file system performance.

In summary, File System IOPS represents the internal I/O requests initiated within the Unity system, while File System Client IOPS represents the I/O requests generated by external clients or processes accessing the file system. Monitoring both metrics provides a comprehensive view of the file system performance and helps in troubleshooting and optimizing the system's I/O operations.

Is there some kind of good health ratio ? Like for instance File System IOPS (Internal I/O requests) should never be more than 1/10 (1 tenth) of the File System Client IOPS or anything is just possible from your experience ?

Hello Solmil,

Here is a link to a kb that maybe of assistance.  https://dell.to/44EbgXM