== sanity test 101b: check stride-io mode read-ahead =========================================================================== 17:51:15 (1785880275)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

3.040860s, 2.75863MB/s
Read-ahead success for size 8192

2.741628s, 3.05972MB/s
Read-ahead success for size 16384

2.809277s, 2.98604MB/s
Read-ahead success for size 32768

2.362720s, 3.5504MB/s
Read-ahead success for size 65536

2.442136s, 3.43495MB/s
Read-ahead success for size 131072

1.952908s, 4.29544MB/s
Read-ahead success for size 262144

2.022633s, 4.14737MB/s
Read-ahead success for size 524288

1.770714s, 4.73742MB/s
Read-ahead success for size 1048576