Data storage and preservation Practical striping-the stripe size Striped too small File A.1 File A.2 File A.3 File A.4 File A.5 Tne A.0 Te A.T 吧八L8 TTE A.9 File A.10 Fie A.II File A.I2 File A.14 Then.15 Tn B.Z TE B.0 TnE B.7 The B.6 Tne B.9 下TeB.10 下FeBT File B.12 Fhe c.I The C.2 rie C.0 THE C.T File C.10 File CI File C.12 Fue C.13 File C.14 e C.D E.19 Disk 1 Disk 2 Disk 3 Disk 4 Disk 5 RAID will only kill performance by forcing disk to seek far too often striping mapreduce 14/62 S.Ponce-CERNData storage and preservation 14 / 62 S. Ponce - CERN devices // risks consistency safety c/c striping mapreduce Practical striping - the stripe size Striped too small Disk 1 Disk 2 Disk 3 Disk 4 Disk 5 File C.18 File C.20 File C.19 File C.13 File C.14 File C.15 File C.16 File C.17 File C.8 File C.9 File C.10 File C.11 File C.12 File C.3 File C.4 File C.5 File C.6 File C.7 File B.10 File B.11 File B.12 File C.1 File C.2 File B.5 File B.6 File B.7 File B.8 File B.9 File A.16 File B.1 File B.2 File B.3 File B.4 File A.11 File A.12 File A.13 File A.14 File A.15 File A.6 File A.7 File A.8 File A.9 File A.10 File A.1 File A.2 File A.3 File A.4 File A.5 RAID will only kill performance by forcing disk to seek far too often