== sanity test 184c: Concurrent write and layout swap ==== 23:42:52 (1786765372) 50+0 records in 50+0 records out 52428800 bytes (52 MB, 50 MiB) copied, 6.82391 s, 7.7 MB/s 54+0 records in 54+0 records out 56623104 bytes (57 MB, 54 MiB) copied, 8.32016 s, 6.8 MB/s ref file size: ref1(52428800), ref2(56623104) 3200+0 records in 3200+0 records out 52428800 bytes (52 MB, 50 MiB) copied, 15.1678 s, 3.5 MB/s Copied 278528 bytes before swapping layout...