== sanity test 248c: verify whole file read behavior ===== 22:00:22 (1746151222)
llite.lustre-ffff88009690f800.read_ahead_stats=c
striped dir -i0 -c2 -H crush2 /mnt/lustre/d248c.sanity
llite.lustre-ffff88009690f800.max_read_ahead_whole_mb=64
whole file readahead of 64 MiB took 22.4 seconds
llite.lustre-ffff88009690f800.read_ahead_stats=
snapshot_time             1746151226.660838332 secs.nsecs
start_time                1746151223.453539428 secs.nsecs
elapsed_time              3.207298904 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-ffff88009690f800.read_ahead_stats=clear
llite.lustre-ffff88009690f800.max_read_ahead_whole_mb=8
non-whole file readahead of 64 MiB took 18.6 seconds
llite.lustre-ffff88009690f800.read_ahead_stats=
snapshot_time             1746151230.992823253 secs.nsecs
start_time                1746151226.670901381 secs.nsecs
elapsed_time              4.321921872 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-ffff88009690f800.max_read_ahead_whole_mb=4