Data-Driven Inspiration: Unlocking Additional Usable Space with Erasure Coding

How can enabling Erasure Coding impact usable space in a 5-node cluster with 200 TB of raw disk space originally configured for RF2?

a) 100 TB
b) 150 TB
c) 180 TB
d) 200 TB

Final answer:

The correct answer is option b. Enabling Erasure Coding typically results in around 150 TB of usable space on a 5-node cluster with 200 TB of raw disk space configured for RF2.

Explanation:

When an administrator decides to enable Erasure Coding on a 5-node cluster originally set up for RF2 with 200 TB of raw disk space, the amount of usable space can significantly increase. Erasure Coding is a space-efficient method of data protection and fault tolerance, offering better storage efficiency compared to simple replication.

With RF2 configuration, each piece of data is copied once, resulting in 100 TB of usable space. By implementing Erasure Coding, the cluster can achieve a higher level of space optimization. The specific increase in usable space depends on the chosen Erasure Coding scheme, such as 4+2, where for every 4 parts of data, 2 parts are for parity.

With an estimated storage efficiency of around 66.67% under Erasure Coding, the usable space on the 5-node cluster with 200 TB of raw disk space could rise to approximately 150 TB. While the exact scheme is not specified in the question, this figure aligns with the typical improvements in space efficiency brought by Erasure Coding.