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

When you perform an upgrade using ONTAP System Manager 9.8, you can use the automated nondisruptive update (ANDU) feature, which simplifies and streamlines the update process. The latest available images will appear in the ONTAP System Manager interface, and you can select the image you want to install. The update history is available within the ONTAP System Manager interface, and you can view the status and progress of the update. You do not need to manually upload the images to the cluster or download them from the NetApp Support site, as ONTAP System Manager will automatically download and upload the images as needed. References :- Automated nondisruptive ONTAP upgrade, How to Upgrade to ONTAP 9.8

 The correct way to warm the cache before clients access the cache volume for the first time is to prepopulate the cache volume with data from the origin volume using the flexcache prepopulate start command. This command copies the data blocks from the origin volume to the cache volume in the background, without affecting the client access to the origin volume. The other options are not valid for this scenario because:

• Enabling block-level invalidation using the volume flexcache origin config modify command does not warm the cache, but rather allows the origin volume to invalidate the cached data blocks when they are modified or deleted.
• Copying the data from the origin volume to the cache volume with the NetApp XCP Migration Tool is not recommended, as it can cause data inconsistency and performance degradation. XCP is a data migration tool that can copy data between different types of volumes, such as FlexVol and FlexGroup, but not between FlexCache and origin volumes.
• Synchronizing the origin and cache first with the volume flexcache sync-properties command does not warm the cache, but rather ensures that the cache volume inherits the properties of the origin volume, such as size, security style, and export policy. References :- Prepopulate a FlexCache volume, FlexCache volume concepts, FlexCache volume best practices

 According to the NetApp best practices, flow control should be disabled on data network ports and cluster network ports using 10GbE Ethernet. This is because flow control can cause excessive pause frames, xon/xoff frames, or packets being re-queued, which can affect the network performance and TCP throughput. Flow control works at the physical link layer and does not consider the upper level protocols. Therefore, it is recommended to disable flow control end-to-end on both data and cluster network ports for optimal performance. References :- How to modify flow control on cluster port in ONTAP, What are the flow control best practices for Ethernet?, Configure your network for best performance