== sanity test 184c: Concurrent write and layout swap ==== 06:32:02 (1788949922) 37+0 records in 37+0 records out 38797312 bytes (39 MB, 37 MiB) copied, 5.38795 s, 7.2 MB/s 21+0 records in 21+0 records out 22020096 bytes (22 MB, 21 MiB) copied, 3.68725 s, 6.0 MB/s ref file size: ref1(38797312), ref2(22020096) 2368+0 records in 2368+0 records out 38797312 bytes (39 MB, 37 MiB) copied, 11.0654 s, 3.5 MB/s Copied 311296 bytes before swapping layout...