== sanity test 184c: Concurrent write and layout swap ==== 08:48:27 (1788785307) 36+0 records in 36+0 records out 37748736 bytes (38 MB, 36 MiB) copied, 8.26124 s, 4.6 MB/s 62+0 records in 62+0 records out 65011712 bytes (65 MB, 62 MiB) copied, 12.1457 s, 5.4 MB/s ref file size: ref1(37748736), ref2(65011712) 2304+0 records in 2304+0 records out 37748736 bytes (38 MB, 36 MiB) copied, 8.86154 s, 4.3 MB/s Copied 606208 bytes before swapping layout...