== sanity test 101b: check stride-io mode read-ahead =========================================================================== 20:44:53 (1767318293)
striped dir -i1 -c2 -H crush /mnt/lustre/d101b.sanity

1.983490s, 4.22922MB/s
Read-ahead success for size 8192

1.134713s, 7.39271MB/s
Read-ahead success for size 16384

1.298483s, 6.46031MB/s
Read-ahead success for size 32768

2.048007s, 4.09599MB/s
Read-ahead success for size 65536

2.144358s, 3.91194MB/s
Read-ahead success for size 131072

1.836888s, 4.56675MB/s
Read-ahead success for size 262144

1.391083s, 6.03027MB/s
Read-ahead success for size 524288

1.509368s, 5.5577MB/s
Read-ahead success for size 1048576