== sanity test 248c: verify whole file read behavior ===== 20:33:23 (1788568403)
llite.lustre-ffff9efa9cebe800.read_ahead_stats=c
striped dir -i0 -c2 -H crush  /mnt/lustre/d248c.sanity
llite.lustre-ffff9efa9cebe800.max_read_ahead_whole_mb=64
whole file readahead of 64 MiB took 7.28681 seconds
llite.lustre-ffff9efa9cebe800.read_ahead_stats=
snapshot_time                       1788568413.724915271 secs.nsecs
start_time                          1788568405.508002937 secs.nsecs
elapsed_time                        8.216912334 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-ffff9efa9cebe800.read_ahead_stats=clear
llite.lustre-ffff9efa9cebe800.max_read_ahead_whole_mb=8
non-whole file readahead of 64 MiB took 8.5469 seconds
llite.lustre-ffff9efa9cebe800.read_ahead_stats=
snapshot_time                       1788568424.423694660 secs.nsecs
start_time                          1788568413.747261931 secs.nsecs
elapsed_time                        10.676432729 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-ffff9efa9cebe800.max_read_ahead_whole_mb=4