== sanity test 248c: verify whole file read behavior ===== 15:47:53 (1761248873)
llite.lustre-ffff88f64b4ed800.read_ahead_stats=c
striped dir -i0 -c2 -H crush2 /mnt/lustre/d248c.sanity
llite.lustre-ffff88f64b4ed800.max_read_ahead_whole_mb=64
whole file readahead of 64 MiB took 8.52821 seconds
llite.lustre-ffff88f64b4ed800.read_ahead_stats=
snapshot_time             1761248885.654752991 secs.nsecs
start_time                1761248876.201209764 secs.nsecs
elapsed_time              9.453543227 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-ffff88f64b4ed800.read_ahead_stats=clear
llite.lustre-ffff88f64b4ed800.max_read_ahead_whole_mb=8
non-whole file readahead of 64 MiB took 5.4425 seconds
llite.lustre-ffff88f64b4ed800.read_ahead_stats=
snapshot_time             1761248892.456632919 secs.nsecs
start_time                1761248885.678066123 secs.nsecs
elapsed_time              6.778566796 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
Try 0 failed: whole file readahead took: 8.52821, greater than non: 5.4425
llite.lustre-ffff88f64b4ed800.max_read_ahead_whole_mb=64
whole file readahead of 64 MiB took 5.74953 seconds
llite.lustre-ffff88f64b4ed800.read_ahead_stats=
snapshot_time             1761248899.494974851 secs.nsecs
start_time                1761248885.678066123 secs.nsecs
elapsed_time              13.816908728 secs.nsecs
hits                      32764 samples [pages]
misses                    4 samples [pages]
zero_size_window          2 samples [pages]
failed_to_fast_read       6 samples [pages]
readahead_pages           2 samples [pages] 16382 16382 32764
llite.lustre-ffff88f64b4ed800.read_ahead_stats=clear
llite.lustre-ffff88f64b4ed800.max_read_ahead_whole_mb=8
non-whole file readahead of 64 MiB took 5.54884 seconds
llite.lustre-ffff88f64b4ed800.read_ahead_stats=
snapshot_time             1761248905.992701302 secs.nsecs
start_time                1761248899.508365543 secs.nsecs
elapsed_time              6.484335759 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 1
llite.lustre-ffff88f64b4ed800.max_read_ahead_whole_mb=4