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🚀 High Availability (HA) vs Fault Tolerance (FT) in VMware

 ðŸš€ High Availability (HA) vs Fault Tolerance (FT) in VMware


In virtualization, keeping workloads running is critical. VMware offers two key features to achieve this: HA (High Availability) and FT (Fault Tolerance) — but they serve different purposes.


🔹 VMware HA (High Availability)

 • Automatically restarts VMs on another ESXi host if one fails.

 • Requires vCenter + shared datastore.

 • Downtime = a few minutes (while VMs restart).

 • Best for general workloads where short downtime is acceptable.


🔹 VMware FT (Fault Tolerance)

 • Provides continuous availability with zero downtime.

 • Runs a live secondary VM in sync with the primary.

 • No restart, no data loss, instant failover.

 • Requires more resources and is ideal for mission-critical workloads.


👉 In short:

 • HA = Restart Protection

 • FT = Continuous Availability


Both are essential, but knowing when to use which can make the difference between acceptable downtime and uninterrupted service.


💡 Which one are you using more in your environment — HA for resilience or FT for critical apps?


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