== sanity test 248c: verify whole file read behavior ===== 17:31:11 (1781213471)
llite.lustre-ffff9992c6bb5000.read_ahead_stats=c
striped dir -i0 -c2 -H crush2  /mnt/lustre/d248c.sanity
llite.lustre-ffff9992c6bb5000.max_read_ahead_whole_mb=64
whole file readahead of 64 MiB took 6.21446 seconds
llite.lustre-ffff9992c6bb5000.read_ahead_stats=
snapshot_time             1781213480.581681883 secs.nsecs
start_time                1781213473.490259266 secs.nsecs
elapsed_time              7.091422617 secs.nsecs
hits                      16382 samples [pages]
misses                    2 samples [pages]
zero_size_window          1 samples [pages]
failed_to_fast_read       3 samples [pages]
readahead_pages           1 samples [pages] 16382 16382 16382
llite.lustre-ffff9992c6bb5000.read_ahead_stats=clear
llite.lustre-ffff9992c6bb5000.max_read_ahead_whole_mb=8
non-whole file readahead of 64 MiB took 9.19446 seconds
llite.lustre-ffff9992c6bb5000.read_ahead_stats=
snapshot_time             1781213491.857611544 secs.nsecs
start_time                1781213480.592740494 secs.nsecs
elapsed_time              11.264871050 secs.nsecs
hits                      16382 samples [pages]
misses                    2 samples [pages]
zero_size_window          1 samples [pages]
failed_to_fast_read       3 samples [pages]
readahead_pages           1 samples [pages] 16382 16382 16382
Test passed on attempt 0
llite.lustre-ffff9992c6bb5000.max_read_ahead_whole_mb=4