[elisbce]

Linux RAID-6: RS(10,8) Google File System II (Colossus): RS(9,6) Quantcast File System: RS(9,6) Intel & Cloudera’ HDFS-EC: RS(9,6) Yahoo Cloud Object Store: RS(11,8) Backblaze’s online backup: RS(20,17) Facebook’s f4 BLOB storage system: RS(14,10) Baidu’s Atlas Cloud Storage: RS(12, 8) .....

[oofabz]

Are the numbers the size in bits? If so, those are very small blocks. It seems like you would get more effective redundancy with larger blocks. Does Reed-Solomon scale so poorly that only tiny blocks are computationally feasible?

[sliken]

Generally blocks. So backblaze takes 17 blocks of input, and generates 20 blocks out output. Then recoveries work if 17 or more blocks are recovered.