== sanity test 101b: check stride-io mode read-ahead =========================================================================== 00:02:18 (1744171338)
striped dir -i1 -c2 -H all_char /mnt/lustre/d101b.sanity

0.417190s, 20.1074MB/s
Read-ahead success for size 8192

0.363260s, 23.0926MB/s
Read-ahead success for size 16384

0.385988s, 21.7328MB/s
Read-ahead success for size 32768

0.355145s, 23.6202MB/s
Read-ahead success for size 65536

0.330666s, 25.3688MB/s
Read-ahead success for size 131072

0.312732s, 26.8236MB/s
Read-ahead success for size 262144

0.300847s, 27.8833MB/s
Read-ahead success for size 524288

0.348464s, 24.0731MB/s
Read-ahead success for size 1048576