== sanity test 101b: check stride-io mode read-ahead =========================================================================== 04:52:56 (1784278376)
striped dir -i1 -c2 -H crush  /mnt/lustre/d101b.sanity

2.065650s, 4.061MB/s
Read-ahead success for size 8192

1.961608s, 4.27639MB/s
Read-ahead success for size 16384

2.436405s, 3.44303MB/s
Read-ahead success for size 32768

2.409158s, 3.48197MB/s
Read-ahead success for size 65536

1.891791s, 4.43421MB/s
Read-ahead success for size 131072

1.662394s, 5.0461MB/s
Read-ahead success for size 262144

1.529293s, 5.48529MB/s
Read-ahead success for size 524288

1.872171s, 4.48068MB/s
Read-ahead success for size 1048576