== sanity test 101b: check stride-io mode read-ahead =========================================================================== 01:34:39 (1788932079)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

1.546773s, 5.4233MB/s
Read-ahead success for size 8192

1.623059s, 5.16839MB/s
Read-ahead success for size 16384

1.933652s, 4.33822MB/s
Read-ahead success for size 32768

1.520827s, 5.51582MB/s
Read-ahead success for size 65536

1.467273s, 5.71714MB/s
Read-ahead success for size 131072

1.218815s, 6.88259MB/s
Read-ahead success for size 262144

1.112095s, 7.54307MB/s
Read-ahead success for size 524288

1.097370s, 7.64428MB/s
Read-ahead success for size 1048576