== sanity test 101b: check stride-io mode read-ahead =========================================================================== 21:57:28 (1781229448)
striped dir -i1 -c2 -H crush  /mnt/lustre/d101b.sanity

0.672291s, 12.4776MB/s
Read-ahead success for size 8192

0.745860s, 11.2469MB/s
Read-ahead success for size 16384

0.781443s, 10.7348MB/s
Read-ahead success for size 32768

0.713538s, 11.7564MB/s
Read-ahead success for size 65536

0.628298s, 13.3513MB/s
Read-ahead success for size 131072

0.634801s, 13.2145MB/s
Read-ahead success for size 262144

0.540754s, 15.5128MB/s
Read-ahead success for size 524288

0.553212s, 15.1635MB/s
Read-ahead success for size 1048576