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An administrator has received a request to clone a source production database to an existing development server. Which two actions must be taken to complete this task?
A. The development server must be registered by Era in order to receive the clone.
B. The development server must be registered by Era and authorized to host clones from the Time Machine.
C. The development server must be authorized for the database Time Machine.
D. The development server must have the IP and credentials provided during cloning.
Explanation:
According to the Nutanix Database Automation (NCP-DB) Learning documents12, to clone a source
production database to an existing development server, the following actions must be taken:
A. The development server must be registered by Era in order to receive the clone1. This is because Nutanix
Era is a database management tool that manages the lifecycle of databases and their copies. Registering the
development server with Era allows it to manage the database on that server.
D. The development server must have the IP and credentials provided during cloning2. This is necessary for
Era to access the development server and perform the cloning operation. The IP address and credentials are
used to establish a connection to the development server. Without these details, Era would not be able to
access the server and perform the cloning operation.
An administrator needs to increase storage for a MongoDB database provisioned using NDB. After launching the NDB CLI, the administrator begins with creating the input file for this operation. Which parameter should the administrator include within the input file?
A. extend_storage
B. update
C. database
D. data_percent
Explanation:
To increase storage for a MongoDB database provisioned using NDB, the administrator needs to use the
extend_storage parameter in the input file for the NDB CLI. This parameter specifies the amount of additional
storage to be added to the database server VM in GB. For example, if the current storage size is 100 GB and
the administrator wants to increase it to 150 GB, the input file should contain the following line:
Which statement best describes what happens when a 3rd-party backup tool is chosen to manage log backups for Microsoft SQL in NDB?
A. If exclusive log access is not granted to NDB, the Point-in-Time (PIT) recovery will not be supported, but snapshot-based recovery of the databases is supported.
B. Third-party backups vendors can continue to backup the archived logs from the database log destination. NDB will still be able to capture the logs, considering the log catch-up begins before the logs get backed up
C. If exclusive log access is not granted to NDB, the Point-in-Time (PIT) recovery will be supported, but snapshot-based recovery of the databases is not supported.
D. Third-party backups vendors can continue to backup the binary logs from the binary log location. NDB will still be able to capture the logs, considering the log catch-up begins before the logs get purged.
Explanation:
NDB supports two modes of log backup management for Microsoft SQL databases: NDB-managed and 3rdparty
managed. In the NDB-managed mode, NDB takes full control of the log backups and stores them in the
Cerebro log location. In the 3rd-party managed mode, NDB allows the use of external backup tools to backup
the logs from the database log destination. However, NDB still needs to capture the logs for its own
operations, such as point-in-time recovery, clone refresh, and log catch-up. Therefore, NDB will periodically
scan the database log destination and copy the logs to the Cerebro log location. This process requires that the
log catch-up begins before the logs get backed up by the 3rd-party tool, otherwise NDB will miss some logs
and the operations will fail. If the 3rd-party tool grants exclusive access to the logs, then NDB will not be able
to capture them at all, and the operations will not be supported.
An administrator needs to distribute NDB management plane components. Which NDB HA VM needs to be deployed on the same L2 network?
A. NDB Agent
B. API Server
C. Repository VMs
D. HA Proxy VMs
Explanation:
NDB High Availability (HA) is a feature that ensures the availability and reliability of the NDB management
plane components, such as the API Server, the Repository VMs, and the NDB Agents. To enable NDB HA,
you need to deploy at least three HA Proxy VMs on the same L2 network as the NDB Server VM. The HA
Proxy VMs act as load balancers and health monitors for the NDB management plane components, and they
also provide a single endpoint for accessing the NDB APIs and UI.
An administrator is trying to register a database server VM with NDB. Which file types will prevent the registration from being successful if located in the C:\ drive?
A. Page
B. System
C. Database
D. Backup
Explanation:
Page files are temporary files that Windows uses to store data that does not fit in the physical memory. Page
files can interfere with the registration of a database server VM with NDB, as they can cause errors or
performance issues. Therefore, page files should be located in a separate drive or partition from the C:\ drive,
where the NDB agent and other files are installed. System, database, and backup files do not prevent the
registration of a database server VM with NDB, as long as they are not corrupted or incompatible with the
NDB requirements.
A database administrator wants to define initialization variables for different types of database engines and workloads, like OLTP and DW. What type of profile would be used?
A. Software Profile Version
B. Network
C. Compute
D. Database Parameters
Explanation:
The database parameters profile is used to define the initialization variables for different types of database
engines and workloads, such as OLTP and DW. The database parameters profile allows the database
administrator to customize the configuration settings for each database engine, such as Oracle, SQL Server,
PostgreSQL, and MySQL. The database parameters profile can also be applied to different database
operations, such as provisioning, cloning, and patching. The database parameters profile helps to optimize the
performance and functionality of the databases according to the specific requirements and best practices of
each database engine and workload.
The software profile version is used to define the software version and edition for each database engine, such
as Oracle 19c Enterprise Edition or SQL Server 2019 Standard Edition. The software profile version is
required for provisioning new databases and patching existing databases. The software profile version helps to
ensure the compatibility and compliance of the databases with the supported software versions and editions.
The network profile is used to define the network configuration and security settings for the database server
VMs and the databases, such as the IP address, subnet mask, gateway, DNS, firewall rules, and SSL
certificates. The network profile is required for registering new database server VMs and provisioning new
databases. The network profile helps to ensure the connectivity and protection of the database server VMs and
the databases within the network environment.
The compute profile is used to define the compute resources and storage policies for the database server VMs
and the databases, such as the CPU, memory, disk size, disk type, compression, deduplication, and replication factor. The compute profile is required for provisioning new databases and cloning existing databases. The
compute profile helps to ensure the availability and efficiency of the database server VMs and the databases
within the Nutanix cluster.
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