== sanity test 248c: verify whole file read behavior ===== 23:46:24 (1746157584)
llite.lustre-ffff8800b6ce4000.read_ahead_stats=c
striped dir -i0 -c2 -H crush /mnt/lustre/d248c.sanity
llite.lustre-ffff8800b6ce4000.max_read_ahead_whole_mb=64
whole file readahead of 64 MiB took 24.6 seconds
llite.lustre-ffff8800b6ce4000.read_ahead_stats=
snapshot_time             1746157588.225788396 secs.nsecs
start_time                1746157585.299391101 secs.nsecs
elapsed_time              2.926397295 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-ffff8800b6ce4000.read_ahead_stats=clear
llite.lustre-ffff8800b6ce4000.max_read_ahead_whole_mb=8
non-whole file readahead of 64 MiB took 23.8 seconds
llite.lustre-ffff8800b6ce4000.read_ahead_stats=
snapshot_time             1746157591.607439463 secs.nsecs
start_time                1746157588.232943864 secs.nsecs
elapsed_time              3.374495599 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-ffff8800b6ce4000.max_read_ahead_whole_mb=4