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Hi @SalmanM , The fault tolerance in EC depends on no of parity blocks the chosen EC policy supports. For ex: take RS-3-2 policy which has got max 3 data blocks and 2 parity blocks. That means you can recover data by losing maximum of 2 blocks (inclusive of   parity or data blocks). You can refer the design guide here https://issues.apache.org/jira/browse/HDFS-7285 for more details or come back here for further info.

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