Hey everyone! 👋
I wanted to share a simple but often overlooked tip to avoid bottlenecks during VM performance reviews. 📊
Problem: Storing VM disk files on the same physical drive or array as the host OS can cause performance issues as workloads scale. Both the host and VMs start competing for the same I/O bandwidth and IOPS, which can lead to lag and even application timeouts. 😬
Solution: The fix is simple! Separate those I/O paths. Here’s how:
Move VM disks to dedicated drives — NVMe or SAS SSDs work best.
Use shared storage — Assign separate controller channels for host OS and VM disks.
RAID 10 or all-flash arrays — Ideal for production environments to avoid mechanical disk limitations.
Pro tip: Monitor disk latency (aim for ≤5ms) and queue depth. For critical workloads, consider storage QoS or use vSAN’s auto-balancing if you're in a hyper-converged environment. 💡
By physically isolating host and VM disk I/O paths, you can keep performance stable and efficient. 💪
Have you tried this in your environment? Would love to hear your thoughts or any lessons you’ve learned! 😄
