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Nx Witness User Manual

By default, Nx Witness utilizes the largest available local storage (non-system) for storing analytics data. However, there may be instances where you would prefer to use a different drive for this purpose.

note Note: External (USB) and Network (CIFS/Samba/NFS) cannot be used for storing analytics data.

Particularly in systems with a high volume of events, it proves advantageous to employ a faster and dedicated drive specifically for this purpose. For example, SSD or NVMe drives offer significantly faster read/write speeds compared to common HDDs, enabling them to effectively handle the incoming analytics events.

To change the Analytics storage location:

1.Navigate to the Server Settings menu, tab Storage management.

2.Hover with your mouse over the available drives and select Store analytics data.

3.If any data has been recorded to the previous drive, decide to Delete or Keep the current analytics data.

Additionally, Nx Witness enables you to predict the storage usage based on the current data recorded. See "Analyzing and Predicting Storage Usage" for details.

To Fix the Analytics Storage Database Error

The error “Storage Issue: Analytics storage DB error. Insufficient permissions on the mount point” typically occurs on Ubuntu servers when trying to store analytics data on a drive that the Nx Witness Server application is not able to properly access due to having inadequate permissions. Your server is likely missing the following permissions to the storage drive:

•Read (the capability to read the contents of the file)

•Execute (the capability to execute a file or view the contents of a directory)

Fix the storage issue by enabling the option forceAnalyticsDbStoragePermissons in the Nx Witness Web Admin interface. This option grants the Nx Witness Server application the necessary read and execute permissions for that storage drive.

By default, the option is enabled, but it may not be enabled if you have upgraded from a previous version. To enable it manually:

1.Open the Nx Witness Web Admin advanced page (i.e., http://<server ip>:<server port>/static/index.html#/advanced).

2.Log in to the administrator account to gain access.

3.Check the box for forceAnalyticsDbStoragePermissons.

4.Click the Save button at the bottom of the page.

note Note: If the server still does not have the appropriate permissions after enabling forceAnalyticsDbStoragePermissons, the error “Storage Issue: Analytics storage DB error. Insufficient permissions on the mount point” will still appear in the Notification Panel.