Get NS0-162 Dumps : Verified NetApp Certified Data Administrator (ONTAP)

To cache on-premises ONTAP volumes into the cloud with Cloud Volumes ONTAP, you need to use the FlexCache feature, which creates a writable, persistent cache of a data volume that is consistent and coherent with its original data set and stored in a remote location. FlexCache supports both SMB and NFS protocols, which are the traditional file access protocols for Windows and UNIX/Linux systems respectively. You can control file access using UNIX-style permissions, NTFS-style permissions, or a mix of both. Clients can access the same files using both SMB and NFS protocols123.

• NVMe and iSCSI are not supported by FlexCache, as they are block protocols that run on standard Ethernet networks. FlexCache is a file-based solution that works with file protocols only12. References :- Client protocols | NetApp Documentation, Client protocols - NetApp, Cloud Volumes ONTAP for AWS: Storage for the Cloud Era.

To deploy a 2-node ONTAP Select cluster with synchronous mirroring and high availability, you need to take the following two steps:

• Ensure that the ONTAP Select Deploy VM resides at a third location other than the two data centers. This is because the Deploy VM includes a mediator service that connects to each node in the active two-node clusters to monitor the HA pairs and assist in managing failures. The mediator service maintains the HA state information at a dedicated iSCSI target associated with each two-node cluster. If the Deploy VM is halted or fails, the mediator service is unavailable and HA capability is lost for the two-node clusters1.
• Use ONTAP Mediator service to make sure that you have a quorum for the two nodes. When a cluster consists of two nodes, it is not possible to achieve the quorum required when a node fails or loses communication. To resolve these types of split-brain situations, the mediator service helps the surviving node to determine whether it should take over the partner node or halt itself1.
• You do not need to install the SnapMirror Sync license on the cluster, as it is not required for synchronous mirroring. You can use the SnapMirror Synchronous (SM-S) feature, which is included in the ONTAP Select Premium license, to create a zero-recovery point objective (RPO) mirror relationship between two volumes on different clusters2.
• You do not need to use ONTAP Select Deploy to install the nodes on the physical hardware, as ONTAP Select is a software-defined storage solution that runs on VMware ESXi hosts. You can use ONTAP Select Deploy to create and manage ONTAP Select clusters and nodes on the virtualized hardware3. References :- ONTAP Select two-node clusters with HA, SnapMirror Synchronous overview, Deploy an ONTAP Select cluster using the CLI.

The space allocation option is a LUN attribute that enables the host to communicate with the storage system about the blocks that are no longer in use by the host file system. When the space allocation option is enabled, the host sends SCSI UNMAP commands to the storage system when files are deleted on the disk. The storage system then reclaims the space from the thin-provisioned LUN and makes it available for other LUNs or volumes. This process is also known as space reclamation or hole punching. If the space allocation option is disabled, the host does not send SCSI UNMAP commands and the storage system does not reclaim the space from the thin-provisioned LUN, resulting in a discrepancy between the host and the storage system. References :- Space reclamation, Enable or disable the space allocation option for a LUN

 Adaptive QoS is a feature that automatically adjusts the QoS throughput ceiling or floor based on the volume size, either used or allocated. The QoS throughput ceiling is the maximum number of IOPS or MB/s that a volume can consume. Therefore, any change that affects the volume size, such as adding data to the volume or resizing the volume, would affect the QoS throughput ceiling. Adding disks to the volume’s aggregate or having more clients access the volume would not affect the QoS throughput ceiling, as they do not change the volume size. References :- Use adaptive QoS policy groups, qos adaptive-policy-group create, Exam Name: NetApp Certified Data Administrator, ONTAP DEMO

When a LUN has space reservations disabled (a non-space-reserved LUN), and its containing volume has no space guarantee, ONTAP reports the volume usage based on the actual data written to the LUN, not the LUN size. Therefore, ONTAP reports that the volume is using 10 GB of its containing aggregate, and the volume is 10% full. References :- Understanding space reservations for LUNs in System Manager, Recommended volume and file or LUN configuration combinations overview