An administrator needs to create a custom PostgreSQL HA software profile. Which software component manages the state of the cluster and handles failover?
Answer(s): D
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.
Nutanix Database Automation (NCP-DB) Course Details, Section 2.4: Provisioning PostgreSQL DatabasesNutanix Database Automation (NCP-DB) Certification Details, Objective 2.4: Provision PostgreSQL DatabasesNutanix 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?
Answer(s): B
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.
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.)
Answer(s): A,D
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.
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 DatabasesNutanix Certified Professional - Database Automation (NCP-DB) v6.5, Knowledge Objectives, Section 5 - Protect NDB-managed Databases Using Time MachineNutanix 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
What is the first step to add Time Machine (TM) data access to a Nutanix cluster?
Answer(s): C
To add Time Machine data access to a Nutanix cluster, the first step is to register the cluster in NDB. This will allow NDB to discover and manage the databases and snapshots on the cluster. You can register multiple Nutanix clusters in NDB using the Add Cluster option in the NDB settings page. You can also specify the cluster role, such as source, target, or both, depending on the data access and replication needs. Enabling or disabling multi-cluster in NDB is not the first step, as this is a global setting that affects the entire NDB instance. Deleting the TM data from the source database is not the first step, as this will remove the data protection and availability of the database.
Nutanix Database Management & Automation Training Course, Module 6: Managing NDB Multi- Cluster, Lesson 1: NDB Multi-Cluster Overview, Slide 5: Registering Nutanix Clusters Nutanix Certified Professional - Database Automation (NCP-DB) 5 Exam, Section 6: Administer an NDB Environment, Objective 6.4: Apply procedural concepts to add Nutanix clusters to NDB
An administrator is adding a stretched VLAN in NDB.Which VLAN type(s) will satisfy this task?
The administrator can add a stretched VLAN in NDB using either static or dynamic VLANs. A stretched VLAN is a VLAN that spans across multiple Nutanix clusters, and allows the NDB-managed databases to communicate and migrate between different clusters. A static VLAN is a VLAN that is manually configured and assigned to the database server VMs and the databases by the administrator. A dynamic VLAN is a VLAN that is automatically configured and assigned to the database server VMs and the databases by the NDB instance, using the Nutanix Calm orchestration service. Both static and dynamic VLANs can be used to create a stretched VLAN in NDB, as long as they have the same VLAN ID and network configuration across the clusters.The administrator cannot add a stretched VLAN in NDB using only VLANs that are not managed in NDB. A VLAN that is not managed in NDB is a VLAN that is configured and assigned to the database server VMs and the databases outside of the NDB instance, using the Nutanix Prism web console or other tools. A VLAN that is not managed in NDB cannot be used to create a stretched VLAN in NDB, as it is not recognized or controlled by the NDB instance.
Nutanix Database Management & Automation Training Course, Module 4: Nutanix Era Configuration, Lesson 4.1: Nutanix Era Configuration, slide 8.Nutanix Database Management & Automation Training Course, Module 6: Nutanix Era Disaster Recovery, Lesson 6.1: Nutanix Era Disaster Recovery, slides 6-7.
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