Data storage and preservation Practical striping the stripe size Stripes too big File C.2 File B.1 File A.1 File C.1 Disk 1 Disk 2 Disk 3 Disk 4 Disk 5 RAID has practically not effect striping mapreduce 13/62 S.Ponce-CERNData storage and preservation 13 / 62 S. Ponce - CERN devices // risks consistency safety c/c striping mapreduce Practical striping - the stripe size Stripes too big Disk 1 Disk 2 Disk 3 Disk 4 Disk 5 File C.2 File C.1 File B.1 File A.1 RAID has practically not effect