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질문 # 203
A request is received to refresh a database clone from a new manual snapshot. When the administrator attempts to create the new snapshot from the Time Machine, it is in a Frozen state.
What causes a Time Machine to enter the Frozen state and what are the administrator's options to complete the request?
정답：D
설명：
A Time Machine is a core construct of the copy data management service in NDB that captures and manages the data of a database to deliver a recovery point objective (RPO) SLA. A Time Machine can enter a Frozen state for various reasons, such as database de-registration, snapshot or log catchup failures, or manual intervention.When a Time Machine is in a Frozen state, it stops taking new snapshots and log backups, and cannot perform any clone, refresh, or restore operations. To resume the normal operation of a Time Machine, it must be thawed by resolving the root cause of the freeze. One of the common causes of a Time Machine freeze is when the database is de-registered from NDB without removing the Time Machine. This can happen when the administrator wants to move the database to a different NDB instance or cluster, or when the database is accidentally de-registered. In this case, the Time Machine becomes orphaned and frozen, and cannot be used for any operations. To complete the request to refresh a database clone from a new manual snapshot, the administrator must first re-register the database in NDB using the same database name and ID as before. This will automatically thaw the Time Machine and resume its operation. The administrator can then create a new manual snapshot from the Time Machine and use it to refresh the database clone. The other options are not correct, as they either require unnecessary steps or do not address the root cause of the freeze. References:
* Nutanix Certified Professional - Database Automation (NCP-DB) v6.5, Section 5 - Protect NDB-managed Databases Using Time Machine, Objective 5.1: Create, delete, and modify SLA retention policies
* Nutanix Database Management & Automation (NDMA) Course, Module 4: Nutanix Database Service (NDB) Data Protection, Lesson 4.1: Data Protection Overview, Topic: Time Machine Concepts
* Nutanix Support & Insights, TN-2101: Nutanix Database Service Time Machine Under the Hood, Section: Time Machine States and Transitions
질문 # 204
A Development team is asking for updated data for a cloned MongoDB instance that is being used as source data for a script. Which task should be performed by an NDB administrator?
정답：B
설명：
A Development team requesting updated data for a cloned MongoDB instance used as source data for a script needs the latest snapshot or point-in-time data. In NDB, the "Clone Refresh" task updates an existing clone with the most recent data from the source database, ensuring the development team has access to current information without recreating the clone. This is the most efficient approach for maintaining an updated clone.
* Option A (Clone the DB from the latest point in time data) is incorrect because it creates a new clone, duplicating effort instead of refreshing the existing one.
* Option B (Execute a clone update) is incorrect as "clone update" is not a standard NDB task; refresh is the correct term.
* Option C (Provision a MongoDB instance) is incorrect because it provisions a new instance, not an update to the clone.
* Option D is correct as Clone Refresh syncs the clone with the latest source data.
References
* Nutanix Database Service (NDB) User Guide, Chapter 5: Configuring Time Machines, Section:
Managing Clones and Refresh
* Nutanix Certified Professional - Database Automation (NCP-DB) v6.5 Blueprint, Section 5: Protect Databases Using Time Machine
질문 # 205
An NDB administrator is looking to free up some space consumption in the container that NDB uses to manage a database landscape.
Where are two of the best locations within NDB that the administrator could view to see where the most storage is being consumed, in order to research for reclamation? (Choose two.)
정답：C,D
설명：
To free up space in the NDB-managed container, the administrator needs to identify storage consumption sources. Two key locations in NDB provide actionable insights:
* C. Clone Database table: This displays all clone databases, including their Size (current storage usage) and Last Refresh (indicating age or staleness). Clones often consume significant space, and older or unused ones can be deleted to reclaim storage.
* D. Snapshot table in Time Machine: This shows snapshots with details like Reclaimable Space (space recoverable by deletion) and Age (how long snapshots have existed). Old or unnecessary snapshots are prime candidates for reclamation.
Why not the other options?
* A. NDB Dashboard (Clone Data Age): While it provides a high-level view, it lacks granular details (e.
g., size per clone) needed for targeted reclamation.
* B. Source Database grid: This shows registered databases' size and status but doesn't focus on derivative objects (clones/snapshots) that typically consume more space.
Thus, C and D are the best locations for detailed storage analysis and reclamation research.
Official Nutanix Database Automation References
* Nutanix Database Management & Automation (NDMA) course, Module 6: Storage and Resource Management, Lesson 6.2: Monitoring and Reclaiming Storage.
* Nutanix Certified Professional - Database Automation (NCP-DB) v6.5 Knowledge Objectives, Section
6: Optimize NDB Solutions, Objective 6.1: Manage Storage Consumption (applicable to v6.10).
* Nutanix NDB Administration Guide: "Clone Database Table" and "Time Machine Snapshot Table" sections.
질문 # 206
An administrator must be able to restore databases based on very strict SLAs, but is facing multiple bottlenecks when storing log backups of databases on NDB Agents.
What can the administrator do to alleviate these issues?
정답：A
설명：
NDB Agents handle log backups for database instances, but storing these backups locally can lead to bottlenecks (e.g., disk I/O, storage capacity). To alleviate this, integrating NDB with Nutanix Objects is the recommended solution. Nutanix Objects is an S3-compatible object storage service within the Nutanix ecosystem, ideal for offloading log backups from NDB Agents to a scalable, centralized storage platform.
This reduces local storage pressure, improves performance, and ensures strict SLAs for database recovery by leveraging efficient backup retrieval.
Other options are less effective:
A: Integrating with AWS S3 or Azure Blob is possible but requires external connectivity and introduces latency, complexity, and cost compared to Nutanix Objects.
B: Adding NDB Agent VMs increases management overhead and doesn't address the root storage bottleneck.
D: Increasing RAM/CPU on NDB Agents may help processing but doesn't solve storage capacity or I/O issues for log backups.
Thus, C is the verified answer, aligning with Nutanix's integrated ecosystem approach.
Official Nutanix Database Automation References
Nutanix Database Management & Automation (NDMA) course, Module 5: Data Protection and Recovery, Lesson 5.3: Configuring Log Backup Storage.
Nutanix Certified Professional - Database Automation (NCP-DB) v7.5Knowledge Objectives, Section 5:
Protect Databases Using NDB, Objective 5.3: Configure Backup Storage Options (applicable to v7.5).
Nutanix NDB Administration Guide: "Integrating NDB with Nutanix Objects for Log Backups" section.
질문 # 207
Where can an administrator configure a custom SSL certificate for Era?
정답：B
설명：
An administrator can configure a custom SSL certificate for Era through the Era User Interface (UI)1. This can be done by logging into the Nutanix Console and selecting SSL Certificates from the drop-down list inside the gear icon23. In the SSL Certificate dialog box, the administrator can click Replace Certificate, then select the Import Key and Certificate radio button23. This process ensures secure communication within the Nutanix Era environment4.
질문 # 208
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