== sanity test 248c: verify whole file read behavior ===== 10:12:12 (1746799932)
llite.lustre-ffff88008d00a000.read_ahead_stats=c
striped dir -i0 -c2 -H crush /mnt/lustre/d248c.sanity
llite.lustre-ffff88008d00a000.max_read_ahead_whole_mb=64
whole file readahead of 64 MiB took 37.7 seconds
llite.lustre-ffff88008d00a000.read_ahead_stats=
snapshot_time             1746799935.262405677 secs.nsecs
start_time                1746799933.267122314 secs.nsecs
elapsed_time              1.995283363 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-ffff88008d00a000.read_ahead_stats=clear
llite.lustre-ffff88008d00a000.max_read_ahead_whole_mb=8
non-whole file readahead of 64 MiB took 36.5 seconds
llite.lustre-ffff88008d00a000.read_ahead_stats=
snapshot_time             1746799937.474038452 secs.nsecs
start_time                1746799935.265685240 secs.nsecs
elapsed_time              2.208353212 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-ffff88008d00a000.max_read_ahead_whole_mb=4