== sanity test 101b: check stride-io mode read-ahead =========================================================================== 03:08:23 (1787382503)
striped dir -i1 -c2 -H crush  /mnt/lustre/d101b.sanity

1.614294s, 5.19646MB/s
Read-ahead success for size 8192

1.393111s, 6.02149MB/s
Read-ahead success for size 16384

1.992512s, 4.21007MB/s
Read-ahead success for size 32768

1.561988s, 5.37047MB/s
Read-ahead success for size 65536

1.437701s, 5.83474MB/s
Read-ahead success for size 131072

1.511297s, 5.5506MB/s
Read-ahead success for size 262144

1.365309s, 6.14411MB/s
Read-ahead success for size 524288

1.315617s, 6.37618MB/s
Read-ahead success for size 1048576