== sanity test 101b: check stride-io mode read-ahead =========================================================================== 23:23:41 (1763353421)
striped dir -i1 -c2 -H crush2 /mnt/lustre/d101b.sanity

0.733208s, 11.441MB/s
Read-ahead success for size 8192

0.689770s, 12.1615MB/s
Read-ahead success for size 16384

0.737283s, 11.3777MB/s
Read-ahead success for size 32768

0.762671s, 10.999MB/s
Read-ahead success for size 65536

0.745250s, 11.2561MB/s
Read-ahead success for size 131072

0.640569s, 13.0956MB/s
Read-ahead success for size 262144

0.575006s, 14.5887MB/s
Read-ahead success for size 524288

0.569815s, 14.7216MB/s
Read-ahead success for size 1048576