== sanity test 248c: verify whole file read behavior ===== 22:11:55 (1746151915)
llite.lustre-ffff88009f3cd000.read_ahead_stats=c
striped dir -i0 -c2 -H crush /mnt/lustre/d248c.sanity
llite.lustre-ffff88009f3cd000.max_read_ahead_whole_mb=64
whole file readahead of 64 MiB took 13.3 seconds
llite.lustre-ffff88009f3cd000.read_ahead_stats=
snapshot_time             1746151921.791771999 secs.nsecs
start_time                1746151916.342876611 secs.nsecs
elapsed_time              5.448895388 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-ffff88009f3cd000.read_ahead_stats=clear
llite.lustre-ffff88009f3cd000.max_read_ahead_whole_mb=8
non-whole file readahead of 64 MiB took 15.4 seconds
llite.lustre-ffff88009f3cd000.read_ahead_stats=
snapshot_time             1746151927.126538261 secs.nsecs
start_time                1746151921.799220208 secs.nsecs
elapsed_time              5.327318053 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-ffff88009f3cd000.max_read_ahead_whole_mb=4