== sanity test 248c: verify whole file read behavior ===== 01:55:15 (1783144515)
llite.lustre-ffff8fa6a005a800.read_ahead_stats=c
striped dir -i0 -c2 -H crush  /mnt/lustre/d248c.sanity
llite.lustre-ffff8fa6a005a800.max_read_ahead_whole_mb=64
whole file readahead of 64 MiB took 3.37624 seconds
llite.lustre-ffff8fa6a005a800.read_ahead_stats=
snapshot_time                       1783144519.217513553 secs.nsecs
start_time                          1783144515.652369235 secs.nsecs
elapsed_time                        3.565144318 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-ffff8fa6a005a800.read_ahead_stats=clear
llite.lustre-ffff8fa6a005a800.max_read_ahead_whole_mb=8
non-whole file readahead of 64 MiB took 2.97869 seconds
llite.lustre-ffff8fa6a005a800.read_ahead_stats=
snapshot_time                       1783144522.890081490 secs.nsecs
start_time                          1783144519.225108599 secs.nsecs
elapsed_time                        3.664972891 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-ffff8fa6a005a800.max_read_ahead_whole_mb=4