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NEW QUESTION # 307
Which ports are used by the NDB database agent for API calls?
Answer: D
Explanation:
The NDB database agent is a service that runs on each database server VM and communicates with the NDB instance. It uses port 443 for HTTPS API calls and port 9440 for Nutanix cluster API calls. These ports are required to be open on the database server VMs for NDB to function properly. References: Nutanix Database Management & Automation (NDMA), page 9; Ports and Protocols Reference Chart | Nutanix Community, section "Nutanix Database Service (NDB)"
NEW QUESTION # 308
An administrator needs to enable multi-cluster to setup NDB HA.
What should the administrator configure for the NDB Agent to satisfy this requirement?
Answer: D
Explanation:
To enable multi-cluster setup for NDB High Availability (HA), the administrator must configure the NDB Agent with a Network Profile. A Network Profile defines the networking settings (e.g., VLANs, IP ranges) that the NDB Agent uses to communicate across clusters. This is critical for multi-cluster HA, as it ensures consistent network configuration for replication, failover, and data synchronization between clusters. The Network Profile must be properly configured to handle inter-cluster traffic and latency requirements (e.g.,
<25ms RTT).
Other options are irrelevant:
* A. Name Prefix: Used for naming conventions, not network configuration.
* C. Static VLAN: A component of a Network Profile, but not the full configuration needed.
* D. Compute Profile: Defines VM resources (CPU, memory), not networking for HA.
Thus, the verified answer is B, aligning with multi-cluster HA networking needs.
Official Nutanix Database Automation References
* Nutanix Database Management & Automation (NDMA) course, Module 4: High Availability and Disaster Recovery, Lesson 4.2: Configuring Multi-Cluster HA.
* Nutanix Certified Professional - Database Automation (NCP-DB) v6.5 Knowledge Objectives, Section
4: Troubleshoot NDB Solutions, Objective 4.3: Configure HA Across Clusters (applicable to v6.10).
* Nutanix NDB Administration Guide: "Configuring Network Profiles for Multi-Cluster HA" section.
NEW QUESTION # 309
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?
Answer: D
Explanation:
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
NEW QUESTION # 310
An administrator is interested in using profiles to simplify the database provisioning process. The profile needs to include information related to the SQL service startup account, and the NDB worker service account.
Which profile would help the administrator accomplish this task?
Answer: B
NEW QUESTION # 311
An administrator needs to provision a PostgreSQL cluster instance with an external Load Balancer. Which software can be omitted on the Reference VM while creating the Software Profile?
Answer: C
Explanation:
When provisioning a PostgreSQL cluster instance with an external load balancer in NDB, the administrator creates a software profile from a reference VM. The reference VM typically includes software like Patroni (for HA management), HAProxy (for internal load balancing), keepalived (for high availability IP management), and etcd (for distributed configuration). Since an external load balancer is used, the internal HAProxy can be omitted from the reference VM. NDB will rely on the external load balancer to distribute traffic, eliminating the need for HAProxy in the software profile, while the other components remain essential for cluster management.
Option A (Patroni) is incorrect because Patroni is required for PostgreSQL HA management.
Option B (HAProxy) is correct as it can be omitted when an external load balancer is configured.
Option C (keepalived) is incorrect because keepalived is needed for HA IP failover.
Option D (etcd) is incorrect because etcd is necessary for distributed configuration in the cluster.
This adjustment streamlines the profile for external load balancer use.
References
Nutanix Database Service (NDB) User Guide, Chapter 4: Managing Software Profiles, Section: Creating Software Profiles for HA Instances Nutanix Certified Professional - Database Automation (NCP-DB) v7.5Blueprint, Section 4: Manage Database Software Profiles
NEW QUESTION # 312
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