ChadGPT:
Erasure Coding (EC) in Nutanix requires more nodes than simple replication because data is striped across nodes with parity blocks for fault tolerance.
In a Redundancy Factor 2 (RF2) cluster, the cluster can tolerate one node failure.
For Erasure Coding with RF2, Nutanix requires a minimum of 4 nodes.
With fewer than 4 nodes, the system cannot properly distribute data and parity blocks while still maintaining resiliency.
The 4-node minimum ensures there are enough nodes to hold the data stripes and parity information across the cluster.
A cluster must have at least four nodes/blocks/racks to enable erasure coding. The cluster can have all four flash nodes or a combination of flash and hybrid nodes, or all hybrid nodes. If erasure coding is enabled on a storage container, a minimum of four blocks for RF2 or six blocks for RF3 is required to maintain block awareness.
check this link:
https://portal.nutanix.com/page/documents/details?targetId=Prism-Central-Guide-vpc_2024_2:wc-erasure-coding-best-practices-requirements-wc-c.html
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