== sanity test 248c: verify whole file read behavior ===== 13:43:53 (1747849433)
llite.lustre-ffff8800a85df800.read_ahead_stats=c
striped dir -i0 -c2 -H crush /mnt/lustre/d248c.sanity
llite.lustre-ffff8800a85df800.max_read_ahead_whole_mb=64
whole file readahead of 64 MiB took 25.9 seconds
llite.lustre-ffff8800a85df800.read_ahead_stats=
snapshot_time             1747849436.842743098 secs.nsecs
start_time                1747849434.064887447 secs.nsecs
elapsed_time              2.777855651 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-ffff8800a85df800.read_ahead_stats=clear
llite.lustre-ffff8800a85df800.max_read_ahead_whole_mb=8
non-whole file readahead of 64 MiB took 25.2 seconds
llite.lustre-ffff8800a85df800.read_ahead_stats=
snapshot_time             1747849440.048495842 secs.nsecs
start_time                1747849436.849531300 secs.nsecs
elapsed_time              3.198964542 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-ffff8800a85df800.max_read_ahead_whole_mb=4