== sanity test 101b: check stride-io mode read-ahead =========================================================================== 02:39:18 (1787380758)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

1.542151s, 5.43955MB/s
Read-ahead success for size 8192

1.705937s, 4.9173MB/s
Read-ahead success for size 16384

1.955336s, 4.29011MB/s
Read-ahead success for size 32768

1.843029s, 4.55153MB/s
Read-ahead success for size 65536

1.870498s, 4.48469MB/s
Read-ahead success for size 131072

1.530453s, 5.48113MB/s
Read-ahead success for size 262144

1.336887s, 6.27473MB/s
Read-ahead success for size 524288

1.109775s, 7.55884MB/s
Read-ahead success for size 1048576