Overview
Instead of relying on dedicated SAN hardware, vSAN pools local disks such as SSDs and HDDs across hosts in a cluster. These pooled resources are then distributed to virtual machines based on storage policies. Administrators can define policies for performance, availability, and fault tolerance, ensuring that workloads receive the appropriate level of protection and efficiency.
vSAN supports hybrid configurations, which use SSDs for cache and HDDs for capacity, as well as all-flash configurations for higher performance. Advanced capabilities include policy-based management, encryption, stretched clusters for multi-site resilience, health monitoring, and integration with vSphere features like HA, DRS, and vMotion.
To configure a vSAN cluster using Quickstart in vCenter:
1. Create or select a cluster and open the Configure > Quickstart tab. 2. Enable services such as HA, DRS, and vSAN. 3. Add ESXi hosts to the cluster. 4. Configure networking for vSAN and vMotion traffic. 5. Claim eligible disks for cache and capacity tiers. 6. Review and finalize the configuration.
Once completed, the cluster presents a unified datastore shared by all hosts.
FAQs
Q1: How many hosts are required for vSAN?
A minimum of three capacity-contributing hosts is recommended, though two-node configurations require a witness host.
Q2: Does vSAN require external storage?
No, it uses local storage devices within ESXi hosts.
Q3: What is policy-based storage management?
It allows administrators to define performance and availability requirements per virtual machine.
Q4: Can vSAN support disaster recovery scenarios?
Yes, features like stretched clusters and encryption enhance resilience and data protection.
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