== sanity test 184c: Concurrent write and layout swap ==== 07:45:18 (1788608718) 37+0 records in 37+0 records out 38797312 bytes (39 MB, 37 MiB) copied, 5.65133 s, 6.9 MB/s 50+0 records in 50+0 records out 52428800 bytes (52 MB, 50 MiB) copied, 9.65526 s, 5.4 MB/s ref file size: ref1(38797312), ref2(52428800) 2368+0 records in 2368+0 records out 38797312 bytes (39 MB, 37 MiB) copied, 10.7156 s, 3.6 MB/s Copied 786432 bytes before swapping layout...