== sanity test 101b: check stride-io mode read-ahead =========================================================================== 07:32:05 (1789299125)
striped dir -i1 -c2 -H all_char  /mnt/lustre/d101b.sanity

1.363693s, 6.15139MB/s
Read-ahead success for size 8192

1.960393s, 4.27904MB/s
Read-ahead success for size 16384

1.990614s, 4.21408MB/s
Read-ahead success for size 32768

1.876102s, 4.4713MB/s
Read-ahead success for size 65536

1.261486s, 6.64978MB/s
Read-ahead success for size 131072

1.796858s, 4.66849MB/s
Read-ahead success for size 262144

1.471545s, 5.70054MB/s
Read-ahead success for size 524288

1.271400s, 6.59793MB/s
Read-ahead success for size 1048576