A customer has a 3-node cluster configured for RF2 with 100TB of raw disk space.

Current Configuration:

The customer has a 3-node cluster configured for RF2 with 100TB of raw disk space.

Erasure Coding Requirements:

Erasure Coding (EC-X) improves storage efficiency by using a parity-based method to store data.

For EC-X to be enabled, a minimum of 4 nodes is required in the cluster.

Explanation:

RF2 (Replication Factor 2): Requires data to be replicated across at least two nodes.

Erasure Coding: Requires additional nodes beyond the replication factor to store parity information. In this case, a minimum of 4 nodes is needed to implement EC-X.

Required Change:

Add 1 Node: Adding one more node to the existing 3-node cluster will meet the minimum requirement of 4 nodes, allowing the customer to enable Erasure Coding.

Outcome:

By adding an additional node, the cluster will be able to utilize Erasure Coding, thereby gaining additional usable space.