To capture database transaction logs in NDB, the Log Catch-up operation within the Time Machine is used. Log Catch-up retrieves and applies transaction logs (e.g., PostgreSQL WAL, SQL Server logs) to a snapshot, ensuring the database can be restored to a specific point in time. This operation bridges gaps between snapshots by incorporating log data, maintaining a continuous recovery chain.
Other options are incorrect:
A. Write-Ahead Logging: A database feature (e.g., in PostgreSQL), not an NDB Time Machine operation.
B. Log Flush: Refers to writing logs to disk, not capturing them for recovery.
D. Snapshots: Capture the database state but do not handle transaction logs specifically.
Thus, the verified answer is C, aligning with NDB’s log management.
Official Nutanix Database Automation References
Nutanix Database Management & Automation (NDMA) course, Module 5: Data Protection and Recovery, Lesson 5.2: Managing Time Machines.
Nutanix Certified Professional - Database Automation (NCP-DB) v7.5Knowledge Objectives, Section 5: Protect Databases Using NDB, Objective 5.2: Manage Time Machine Operations (applicable to v7.5).
Nutanix NDB Administration Guide: "Log Catch-up Operation" section.
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