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Free NCP-DB-6.5 Exam Braindumps (page: 18)

Page 17 of 38
PDF with 251 Questions

What does a Time Machine frozen status indicate?

  1. The database is paused on the database VM.
  2. The database was de-registered from NDB without removing the associated time machine.
  3. The NDB agent is stopped on the database VM.
  4. The Time Machine is paused and all automatic snapshot and log catch-up activities are halted.

Answer(s): B

Explanation:

A Time Machine frozen status indicates that the database that was associated with the Time Machine has been de-registered from NDB, but the Time Machine itself has not been deleted. This means that the Time Machine still contains the snapshots and logs of the de-registered database, but it cannot perform any further operations on it. To resume the normal functioning of the Time Machine, the administrator can either re-register the database with NDB, or delete the Time Machine and free up the storage space.


Reference:

Nutanix Support & Insights, section "Resolving All Alerts for a Time Machine"



An administrator needs to create a custom PostgreSQL HA software profile.
Which software component manages the state of the cluster and handles failover?

  1. etcd
  2. keepa lived
  3. HAProxy
  4. Patroni

Answer(s): D

Explanation:

NDB supports PostgreSQL HA software profiles for provisioning PostgreSQL databases with high availability. PostgreSQL HA software profiles consist of three components: etcd, HAProxy, and Patroni.

etcd is a distributed key-value store that provides a reliable way to store configuration data across a cluster of machines. etcd is used by Patroni to store and synchronize the cluster state and configuration.
HAProxy is a load balancer that distributes incoming requests to the PostgreSQL nodes. HAProxy is used to expose a single endpoint for database connections even as the roles of the individual nodes change.
Patroni is a template for PostgreSQL high availability. Patroni is responsible for managing the state of the cluster and handling failover. Patroni uses etcd as the distributed configuration store and relies on HAProxy for load balancing.
Therefore, the software component that manages the state of the cluster and handles failover is Patroni.


Reference:

Nutanix Database Automation (NCP-DB) Course Details, Section 2.4: Provisioning PostgreSQL Databases
Nutanix Database Automation (NCP-DB) Certification Details, Objective 2.4: Provision PostgreSQL Databases
Nutanix Database Automation (NCP-DB) YouTube Playlist, Video 2.4: Provisioning PostgreSQL Databases
[Nutanix Database Automation (NCP-DB) User Guide], Section 2.4: Provision PostgreSQL Databases [PostgreSQL High Availability: Under the Hood ­ Nutanix.dev]



What must be completed within NDB before patching a Linux OS?

  1. Update the database.
  2. Configure the repository.
  3. Configure database high availability.
  4. Update the software profile version.

Answer(s): B

Explanation:

Before patching a Linux OS on a database server VM provisioned using NDB, you must configure the repository for the OS updates. This can be done by creating a Repository Profile in NDB and specifying the URL, username, and password for the repository. The Repository Profile can be applied to one or more database server VMs during the provisioning process or later. By configuring the repository, you ensure that NDB can access and download the latest OS patches from a trusted source.


Reference:

Nutanix Database Automation (NCP-DB) Course Details, Nutanix Database Automation (NCP-DB) Certification Details, Nutanix Database Automation (NCP-DB) YouTube Playlist, Nutanix Database Automation User Guide.



In NDB, which two Time Machine options are available when creating a database clone? {Choose two.)

  1. Point in time
  2. Restore point
  3. Backup
  4. Snapshot

Answer(s): A,D

Explanation:

The correct answer is A and D because these are the two Time Machine options that are available when creating a database clone in NDB. Point in time allows the user to specify a date and time to create a clone from a specific point in the database history. Snapshot allows the user to select a previously taken snapshot to create a clone from a consistent state of the database. Option B is incorrect because Restore point is not a Time Machine option, but a feature that allows the user to restore a source database to a previous point in time. Option C is incorrect because Backup is not a Time Machine option, but a feature that allows the user to backup a database to a remote location.


Reference:

The following sources provide more information about the Time Machine options and cloning features in NDB:
Nutanix Database Management & Automation (NDMA) course, Module 4: Protecting Databases Using Time Machine, Lesson 4.2: Cloning Databases
Nutanix Certified Professional - Database Automation (NCP-DB) v6.5, Knowledge Objectives, Section 5 - Protect NDB-managed Databases Using Time Machine
Nutanix Database Service (NDB) User Guide, Chapter 6: Protecting Databases Using Time Machine, Section 6.2: Cloning Databases
[Nutanix Support & Insights], NDB Time Machine Under the Hood






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