== sanity test 248c: verify whole file read behavior ===== 13:12:48 (1746119568)
llite.lustre-ffff8801373c9000.read_ahead_stats=c
striped dir -i0 -c2 -H crush2 /mnt/lustre/d248c.sanity
llite.lustre-ffff8801373c9000.max_read_ahead_whole_mb=64
whole file readahead of 64 MiB took 37.5 seconds
llite.lustre-ffff8801373c9000.read_ahead_stats=
snapshot_time             1746119571.017135081 secs.nsecs
start_time                1746119569.014442787 secs.nsecs
elapsed_time              2.002692294 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-ffff8801373c9000.read_ahead_stats=clear
llite.lustre-ffff8801373c9000.max_read_ahead_whole_mb=8
non-whole file readahead of 64 MiB took 35.7 seconds
llite.lustre-ffff8801373c9000.read_ahead_stats=
snapshot_time             1746119573.330879115 secs.nsecs
start_time                1746119571.022669394 secs.nsecs
elapsed_time              2.308209721 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-ffff8801373c9000.max_read_ahead_whole_mb=4