nodes in group. ➢ ReplicaIndex: It will represent the position of chunk with respective to ec input buffers order. In other words, EC Chunk position in full stripe, in the order of 1 to (data + parity) Input File 1MB - chunk1 Ozone Client c1:block1 c1:block1 1MB - chunk2 1MB - chunk3 1MB - chunk4 1MB - chunk5 1MB - chunk6 blockGrpID:1 1MB c4:chunk4 1MB c5:chunk5 1MB c6:chunk6 1MB parity1 parity1 (c4, c5, c6) 1MB parity2 (c4, c5, c6) 1MB c1:chunk1 1MB c2:chunk2 1MB c3:chunk 3 1MB parity1 (c1, c2, c3) 1MB parity2 (c1, c2, c3) Stripe-1 Stripe-2 N1 N2 N3 N4 N5 c1:block1 EC Write:

读取⽂件 Chunk1 Chunk2 Chunk3 Chunk4 Chunk5 Chunk6 Chunk7 Chunk8 … data1 data2 data3 parity1 parity2 B-2-d B-2-d B-2-d B-2-p B-2-p Chunk2 1MB Chunk3 1MB Parity1 1MB Parity2 1MB Chunk4 1MB 1MB Chunk5 1MB Chunk6 1MB Parity1 1MB Parity2 1MB 条带1 条带2 0 Chunk1 1MB 10 数据在线修复 DN5 C-2 DN1 C-2 DN2 C-2 DN3 C-2 DN4 C-2 EC Container Group 客户端 读取⽂件 Chunk1 Chunk2 Chunk3 Chunk4 Chunk4 Chunk5 Chunk6 Chunk7 Chunk8 … data1 data2 data3 parity1 parity2 B-2-d B-2-d B-2-d B-2-p B-2-p Chunk1 1MB Chunk2 1MB Chunk3 1MB Parity1 1MB Parity2 1MB Chunk4 1MB Chunk5 1MB

读取⽂件 Chunk1 Chunk2 Chunk3 Chunk4 Chunk5 Chunk6 Chunk7 Chunk8 … data1 data2 data3 parity1 parity2 B-2-d B-2-d B-2-d B-2-p B-2-p Chunk2 1MB Chunk3 1MB Parity1 1MB Parity2 1MB Chunk4 1MB 1MB Chunk5 1MB Chunk6 1MB Parity1 1MB Parity2 1MB 条带1 条带2 0 Chunk1 1MB 数据读取在线恢复 DN5 C-2 DN1 C-2 DN2 C-2 DN3 C-2 DN4 C-2 EC Container Group 客户端 读取⽂件 Chunk1 Chunk2 Chunk3 Chunk4 Chunk4 Chunk5 Chunk6 Chunk7 Chunk8 … data1 data2 data3 parity1 parity2 B-2-d B-2-d B-2-d B-2-p B-2-p Chunk1 1MB Chunk2 1MB Chunk3 1MB Parity1 1MB Parity2 1MB Chunk4 1MB Chunk5 1MB