== sanity test 101b: check stride-io mode read-ahead =========================================================================== 15:58:38 (1778615918)
striped dir -i1 -c2 -H crush2  /mnt/lustre/d101b.sanity

1.710439s, 4.90436MB/s
Read-ahead success for size 8192

1.809724s, 4.6353MB/s
Read-ahead success for size 16384

2.410520s, 3.48MB/s
Read-ahead success for size 32768

1.733294s, 4.83969MB/s
Read-ahead success for size 65536

1.852522s, 4.52821MB/s
Read-ahead success for size 131072

1.081372s, 7.75737MB/s
Read-ahead success for size 262144

1.041597s, 8.0536MB/s
Read-ahead success for size 524288

0.906255s, 9.25634MB/s
Read-ahead success for size 1048576