An administrator notices that a database VM is experiencing poor disk performance.

For a database VM experiencing poor disk performance, the administrator should consider using **Volume Groups** (Nutanix Volumes). Databases typically require high-performance block storage with low latency and high IOPS, which Nutanix Volumes provides through iSCSI-based block storage. Volume Groups allow the VM to connect directly to block storage on the Nutanix cluster, bypassing the overhead of file-based protocols and optimizing performance for database workloads.

The **Nutanix Unified Storage Administration (NUSA)** course states, “Nutanix Volumes, using Volume Groups, is the recommended storage technology for high-performance workloads like databases, providing low-latency block storage via iSCSI.” Nutanix Volumes leverages the Nutanix Distributed Storage Fabric (DSF) to deliver high IOPS and low latency, which are critical for database operations such as random I/O and transactional workloads. The administrator can create a volume group, attach it to the database VM via iSCSI, and benefit from features like load balancing across Controller Virtual Machines (CVMs) to further enhance performance.

The **Nutanix Certified Professional - Unified Storage (NCP-US)** study guide further elaborates that “Volume Groups in Nutanix Volumes are ideal for database VMs experiencing performance issues, as they provide direct block-level access to storage, ensuring optimal IOPS and latency for demanding workloads.” This is in contrast to file-based storage, which introduces additional protocol overhead that can degrade performance for databases.

The other options are incorrect:

- **Nutanix Files NFS export**: Nutanix Files with NFS is designed for file sharing, not block storage, and introduces latency due to the NFS protocol, making it unsuitable for high-performance database workloads.

- **Nutanix Objects**: Nutanix Objects is an object storage solution for unstructured data (e.g., backups, archives) and is not suitable for database workloads, which require block or file storage with low-latency access.

- **Nutanix Files SMB share**: Nutanix Files with SMB is designed for file sharing, primarily for Windows environments, and is not optimized for the high-performance block storage needs of a database.

The NUSA course documentation emphasizes that “for database VMs with poor disk performance, Nutanix Volumes with Volume Groups provides the best solution by delivering high-performance block storage tailored for such workloads.”