== sanity test 248c: verify whole file read behavior ===== 02:08:13 (1789452493)
llite.lustre-ffff88e38ac6c800.read_ahead_stats=c
striped dir -i0 -c2 -H crush  /mnt/lustre/d248c.sanity
llite.lustre-ffff88e38ac6c800.max_read_ahead_whole_mb=64
whole file readahead of 64 MiB took 5.21386 seconds
llite.lustre-ffff88e38ac6c800.read_ahead_stats=
snapshot_time                       1789452501.136189525 secs.nsecs
start_time                          1789452495.229637942 secs.nsecs
elapsed_time                        5.906551583 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-ffff88e38ac6c800.read_ahead_stats=clear
llite.lustre-ffff88e38ac6c800.max_read_ahead_whole_mb=8
non-whole file readahead of 64 MiB took 6.52612 seconds
llite.lustre-ffff88e38ac6c800.read_ahead_stats=
snapshot_time                       1789452508.939164368 secs.nsecs
start_time                          1789452501.165399779 secs.nsecs
elapsed_time                        7.773764589 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-ffff88e38ac6c800.max_read_ahead_whole_mb=4