== sanity test 101b: check stride-io mode read-ahead =========================================================================== 06:08:48 (1783073328)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

1.056134s, 7.94275MB/s
Read-ahead success for size 8192

1.046678s, 8.01451MB/s
Read-ahead success for size 16384

1.257736s, 6.66961MB/s
Read-ahead success for size 32768

0.967661s, 8.66895MB/s
Read-ahead success for size 65536

0.796602s, 10.5305MB/s
Read-ahead success for size 131072

0.741030s, 11.3202MB/s
Read-ahead success for size 262144

0.671913s, 12.4847MB/s
Read-ahead success for size 524288

0.735873s, 11.3995MB/s
Read-ahead success for size 1048576