An administrator originally configured the storage for an Oracle database running on Nutanix NDB using ASMLib. The administrator would like to scale the size of the database. What should the administrator do to most efficiently increase the size of the database?

Nutanix Database Service (NDB) has a native "Scale-Up Storage" feature designed for this exact purpose. This operation is the most efficient method as it automates the entire process. For an Oracle database using ASM, NDB handles resizing the underlying vDisks on the Nutanix cluster and then executes the necessary commands within the guest OS to instruct ASM to recognize the new space and extend the disk group. This avoids manual intervention, complex migrations, or the introduction of non-native storage.

B. While adding new vDisks is a valid ASM technique, it is more complex than using the integrated NDB feature that seamlessly resizes existing disks.
C. Creating a new, larger database and performing a data migration is a highly disruptive, time-consuming, and inefficient method for a simple storage scaling task.
D. Mounting an external iSCSI LUN is contrary to the Nutanix HCI architecture and is not the native, integrated method for scaling storage within NDB.

1. Nutanix Database Service (NDB) User Guide v2.5, Chapter: Database Management, Section: Scaling Up Database Storage. The documentation explicitly states, "NDB allows you to scale up the storage of a database by resizing the existing vDisks... For an Oracle database, NDB resizes the disks and then runs the ALTER DISKGROUP RESIZE command."