== sanity test 248c: verify whole file read behavior ===== 00:57:12 (1743742632)
llite.lustre-ffff88012a644800.read_ahead_stats=c
striped dir -i0 -c2 -H crush2 /mnt/lustre/d248c.sanity
llite.lustre-ffff88012a644800.max_read_ahead_whole_mb=64
whole file readahead of 64 MiB took 37.4 seconds
llite.lustre-ffff88012a644800.read_ahead_stats=
snapshot_time             1743742635.132403567 secs.nsecs
start_time                1743742633.126215568 secs.nsecs
elapsed_time              2.006187999 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-ffff88012a644800.read_ahead_stats=clear
llite.lustre-ffff88012a644800.max_read_ahead_whole_mb=8
non-whole file readahead of 64 MiB took 35.5 seconds
llite.lustre-ffff88012a644800.read_ahead_stats=
snapshot_time             1743742637.432347311 secs.nsecs
start_time                1743742635.137547499 secs.nsecs
elapsed_time              2.294799812 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-ffff88012a644800.max_read_ahead_whole_mb=4