In Nutanix Database Service (NDB), the Time Machine (TM) feature allows restores, including Point-in-Time (PIT) restores, which require continuous log retention to replay transaction logs to a specific moment. If the option to restore data to a Point in Time is unavailable, it indicates that the current Time Machine Service Level Agreement (SLA) does not support continuous log retention. NDB SLAs are categorized (e.g., BRONZE, SILVER, GOLD), with BRONZE or higher levels required to enable PIT restore by including continuous log retention. The administrator must update the TM SLA to at least BRONZE to enable this feature, ensuring logs are retained for PIT operations.
Option A (Restore Source DB using a snapshot) is incorrect because a snapshot-only restore does not support PIT; it restores to the snapshot time only.
Option B (Update TM SLA to BRONZE or higher) is correct as it enables continuous log retention necessary for PIT restores.
Option C (Create DB clone using a snapshot) is incorrect because cloning from a snapshot does not provide PIT capability without log retention.
Option D (Update TM SLA to BRASS or lower) is incorrect because "BRASS" is not a valid SLA tier, and lowering the SLA would not enable PIT.
This adjustment ensures PIT restore functionality.
References
Nutanix Database Service (NDB) User Guide, Chapter 5: Configuring Time Machines, Section: Configuring SLAs for Point-in-Time Restore
Nutanix Certified Professional - Database Automation (NCP-DB) v7.5Blueprint, Section 5: Protect Databases Using Time Machine
