Structuring data for efficient l/O 4 format compress addr state c/e Data structure by example-access Find out overheated devices at a given time o find the offset of that time in the file ●read10 Knumbers o apply simple filter read seek Cost 。one seek o one read of 10K ints This is efficient row/cal 7/42 S.Ponce-CERNStructuring data for efficient I/O 7 / 42 S. Ponce - CERN format compress addr state c/c row/col Data structure by example - access Find out overheated devices at a given time find the offset of that time in the file read 10K numbers apply simple filter seek read Cost one seek one read of 10K ints This is efficient !