Nutanix NCSE-Core Exam With Confidence Using Practice Dumps

Understanding the Application Requirements:

The application is very transactional with a 28/72 random, read/write ratio. This indicates a high write intensity, which necessitates optimized storage configurations to handle the I/O load efficiently.

Add Multiple Virtual Disks:

Option B: Add a minimum of four virtual disks to each VM and aggregate them on guest OS level:

By adding multiple virtual disks and aggregating them within the guest OS, the I/O operations can be spread across multiple disks. This can significantly improve I/O performance by leveraging parallelism and reducing I/O contention on a single disk.

This approach also helps in better utilizing the underlying storage infrastructure, which can include multiple SSDs and HDDs managed by Nutanix Distributed Storage Fabric (DSF)​​.

Analysis of Other Options:

Option A: Add one large SSD to each node and enable Flash Mode for the VMs:

Adding a single large SSD may not fully leverage the parallel I/O capabilities needed for high transactional workloads.

Option C: Add a minimum of four SSDs to each node to ensure all writes go to the SSDs:

While this improves performance, it focuses on node-level configuration rather than optimizing VM-level disk I/O distribution.

Option D: Add one large virtual disk to each VM and use it for all application data:

This creates a bottleneck as all I/O operations are directed to a single virtual disk, limiting performance improvements.

Conclusion:

For optimal performance of a highly transactional application with a high write ratio, adding multiple virtual disks and aggregating them within the guest OS is the most effective solution.

References: Nutanix best practices for VM and storage configuration.

To address the concern about rebuilding data when a node hosting 100TB of data goes offline, Nutanix uses the distribution of rebuild tasks across all nodes. This approach significantly reduces the time required for data rebuilding by leveraging the collective resources of the entire cluster, ensuring faster recovery and minimizingthe impact on performance​​.

B. N+1:

Based on the sizing scenario and the configuration shown in the exhibit, the Failover option selected is "Standard (N+1)."

This indicates that the cluster is configured to provide N+1 resiliency, where the system can handle the failure of one node by having an additional node available to take over.

This level of resiliency is common in environments where a balance between cost and availability is required.

References:

Nutanix Sizer tool and Nutanix documentation provide detailed explanations on configuring clusters with different levels of resiliency, including N+1.