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NEW QUESTION # 188
A user accidentally drops a table in the database at 10:42pm and the NDB administrator is tasked with restoring the table.
The snapshot schedule is set for every 30 minutes and the log catchup is set for every 15 minutes. The last available snapshot is at 10:30pm.
What is the optimal path to restore the table back with minimum data loss?
Answer: A
Explanation:
The optimal path to restore the table back with minimum data loss is to use the point in time restore feature of NDB, which allows the administrator to restore the database to a specific point in time based on the available snapshots and logs1. By restoring using point in time till 10:42pm, the administrator can recover the table just before it was dropped by the user, and minimize the data loss to the least possible amount1. The other options are not optimal, as they either involve restoring an older snapshot, which may result in more data loss, or restoring a non-existent snapshot, which is not possible. References:
* 1: Nutanix Database Automation (NCP-DB) course, Module 6: Database Recovery, Lesson 6.2: Point in Time Restore, slide 5
NEW QUESTION # 189
An administrator needs the ability to clone a source database to a point in time.
What is the lowest log frequency in minutes that can be configured in the Era IJI for log catchup operation?
Answer: C
Explanation:
The log frequency in the Era IJI for log catchup operation can be configured to as low as 5 minutes. This allows the system to capture changes to the database at a high frequency, enabling more precise point-in-time recovery options. However, it's important to note that a higher frequency of log catchup operations can lead to increased system load. Therefore, the optimal frequency may vary depending on the specific requirements and capabilities of your system12. Please refer to the Nutanix Database Automation (NCP-DB) Learning documents for more detailed information.
NEW QUESTION # 190
A new web application performs up to 200 concurrent connections to a PostgreSQL database. An administrator needs to configure the system to provision those DB servers.
Which action would easily help the administrator achieving this goal?
Answer: C
Explanation:
A new web application with up to 200 concurrent connections to a PostgreSQL database requires a robust and scalable configuration. Provisioning a PostgreSQL HA (High Availability) instance in NDB is the most effective action to achieve this goal. An HA instance leverages replication (e.g., streaming replication) to distribute load and ensure availability, accommodating high concurrency by allowing multiple nodes to handle traffic. This approach simplifies configuration compared to manual scripting or parameter adjustments.
Option A (Use Post Create Command when provisioning the DB) is incorrect because post-create commands are for custom scripts, not optimal for handling concurrent connections.
Option B (Create a new Database Parameters profile) is incorrect because while it can tune settings, it's less efficient than HA for scaling concurrency.
Option C (Edit the API equivalent shell script) is incorrect as it's a manual and error-prone method compared to HA provisioning.
Option D is correct because a PostgreSQL HA instance natively supports high concurrency and availability.
Note: The typo "PostqreSQL" is assumed to mean "PostgreSQL."
References
Nutanix Database Service (NDB) User Guide, Chapter 4: Managing Database Engines, Section: Provisioning HA Instances Nutanix Certified Professional - Database Automation (NCP-DB) v7.5Blueprint, Section 4: Manage Database Engines
NEW QUESTION # 191
How would an administrator enter the NDB command line to change the static IP address on the NDB VM?
Answer: B
Explanation:
To change the static IP address on the NDB VM, an administrator would need to enter the NDB command line using the cerebro_cli command. The cerebro_cli command is used to access the Cerebro service, which is responsible for managing the NDB instance and its components. The cerebro_cli command can be run from the NDB VM or from any other VM that has network connectivity to the NDB VM. The cerebro_cli command has various subcommands and options to perform different tasks, such as changing the IP address, hostname, password, or certificate of the NDB VM. To change the static IP address, the administrator would need to use the cerebro_cli network update subcommand with the appropriate parameters, such as the new IP address, netmask, gateway, and DNS servers. The cerebro_cli network update subcommand also requires the administrator to provide the current password of the NDB VM for authentication. After changing the IP address, the administrator would need to restart the NDB VM for the changes to take effect. References:
* Nutanix Certified Professional - Database Automation (NCP-DB) v6.5, Section 2 - Deploy and Configure an NDB Solution, Objective 2.2: Configure an NDB Instance
* Nutanix Database Management & Automation (NDMA) Course, Module 3: Nutanix Database Service (NDB) Installation and Configuration, Lesson 3.2: Configuring NDB, Topic: Changing the IP Address of the NDB VM
* Nutanix Database Service (NDB) Command Line Interface Guide, Chapter 2: Cerebro CLI, Section:
cerebro_cli network update
NEW QUESTION # 192
An administrator needs to quickly restore a database to a previous point in time following an accidental data modification. The recovery must minimize downtime and avoid completely reinstalling the database.
Which NDB capability should be used?
Answer: D
Explanation:
NDB Time Machine is the data-protection and recovery capability designed for this requirement. It combines application-consistent Nutanix storage snapshots with captured database transaction logs. The snapshot supplies a consistent recovery baseline, and the retained logs can be replayed to the requested time, enabling point-in-time recovery after an accidental modification while avoiding database reinstallation. This storage- efficient workflow is designed to reduce recovery time and minimize operational disruption. A Software Profile supplies standardized operating-system and database binaries for provisioning or patching; it does not preserve transactional recovery history. A Database Parameters Profile controls engine settings. Database cloning creates another usable copy and may use Time Machine data, but it is not the primary in-place recovery capability requested. Therefore, the correct answer is B, Time Machine. Nutanix Time Machine data protection
NEW QUESTION # 193
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