== sanity test 101b: check stride-io mode read-ahead =========================================================================== 11:06:26 (1787843186)
striped dir -i1 -c2 -H crush  /mnt/lustre/d101b.sanity

2.063325s, 4.06558MB/s
Read-ahead success for size 8192

1.798769s, 4.66353MB/s
Read-ahead success for size 16384

2.024746s, 4.14304MB/s
Read-ahead success for size 32768

1.858048s, 4.51474MB/s
Read-ahead success for size 65536

1.483791s, 5.6535MB/s
Read-ahead success for size 131072

1.340877s, 6.25606MB/s
Read-ahead success for size 262144

1.138589s, 7.36755MB/s
Read-ahead success for size 524288

1.512650s, 5.54564MB/s
Read-ahead success for size 1048576