== sanity test 101b: check stride-io mode read-ahead =========================================================================== 16:00:20 (1776196820)
striped dir -i1 -c2 -H crush /mnt/lustre/d101b.sanity

0.231815s, 36.1866MB/s
Read-ahead success for size 8192

0.336912s, 24.8985MB/s
Read-ahead success for size 16384

0.402920s, 20.8195MB/s
Read-ahead success for size 32768

0.271190s, 30.9326MB/s
Read-ahead success for size 65536

0.201000s, 41.7344MB/s
Read-ahead success for size 131072

0.216321s, 38.7785MB/s
Read-ahead success for size 262144

0.231087s, 36.3006MB/s
Read-ahead success for size 524288

0.268846s, 31.2023MB/s
Read-ahead success for size 1048576