== sanity test 184c: Concurrent write and layout swap ==== 22:31:11 (1789698671) 36+0 records in 36+0 records out 37748736 bytes (38 MB, 36 MiB) copied, 1.95711 s, 19.3 MB/s 28+0 records in 28+0 records out 29360128 bytes (29 MB, 28 MiB) copied, 1.63219 s, 18.0 MB/s ref file size: ref1(37748736), ref2(29360128) 2304+0 records in 2304+0 records out 37748736 bytes (38 MB, 36 MiB) copied, 3.18132 s, 11.9 MB/s Copied 1671168 bytes before swapping layout...