Nutanix Files, part of Nutanix Unified Storage (NUS), supports WORM (Write Once, Read Many) shares to enforce immutability for compliance and data retention. A WORM share prevents files from being modified or deleted for a specified retention period. The “cool-off interval” (or cool-off period) is the time after a file is written to a WORM share during which it can still be modified or deleted before becoming immutable. The default cool-off interval is typically 1 minute, and the administrator wants to update it to 5 minutes.
Analysis of Options:
Option A (Delete and re-create the WORM share): Incorrect. Deleting and re-creating the WORM share would remove the existing share and its data, which is disruptive and unnecessary. The cool-off interval can be updated without deleting the share, making this an inefficient and incorrect approach.
Option B (Update the worm_cooloff_interval parameter using CLI): Correct. The worm_cooloff_interval parameter controls the cool-off period for WORM shares in Nutanix Files. This parameter can be updated using the Nutanix CLI (e.g., ncli or afs commands) on the file server. The administrator can log into an FSVM, use the CLI to set the worm_cooloff_interval to 5 minutes (300 seconds), and apply the change without disrupting the share. This is the most direct and efficient method to update the cool-off interval.
Option C (Contact support to update the WORM share): Incorrect. Contacting Nutanix support is unnecessary for this task, as updating the cool-off interval is a standard administrative action that can be performed using the CLI. Support is typically needed for complex issues, not for configurable parameters like this.
Option D (Use FSM to update the worm_cooloff_interval parameter): Incorrect. FSM (File Server Manager) is not a standard Nutanix tool or interface for managing Files configurations. The correct method is to use the CLI (option B) to update the worm_cooloff_interval parameter. While the Files Console (FSM-like interface) can manage some share settings, the cool-off interval requires CLI access.
Why Option B?
The worm_cooloff_interval parameter is a configurable setting in Nutanix Files that controls the cool-off period for WORM shares. Updating this parameter via the CLI (e.g., using ncli or afs commands on an FSVM) allows the administrator to change the cool-off interval from the default (1 minute) to 5 minutes without disrupting the existing share. This is the recommended and most efficient method per Nutanix documentation.
Exact Extract from Nutanix Documentation:
From the Nutanix Files Administration Guide (available on the Nutanix Portal):
“The cool-off interval for a WORM share, which determines the time after a file is written during which it can still be modified, is controlled by the worm_cooloff_interval parameter. To update this interval, use the CLI on an FSVM to set the parameter (e.g., to 300 seconds for 5 minutes) using commands like ncli or afs, then apply the change.”
[:, Nutanix Files Administration Guide, Version 4.0, Section: “Configuring WORM Shares” (Nutanix Portal)., Nutanix Certified Professional - Unified Storage (NCP-US) Study Guide, Section: “Nutanix Files WORM Configuration”., , ]
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