== sanity test 184c: Concurrent write and layout swap ==== 03:36:27 (1788939387) 34+0 records in 34+0 records out 35651584 bytes (36 MB, 34 MiB) copied, 6.63512 s, 5.4 MB/s 27+0 records in 27+0 records out 28311552 bytes (28 MB, 27 MiB) copied, 6.23184 s, 4.5 MB/s ref file size: ref1(35651584), ref2(28311552) 2176+0 records in 2176+0 records out 35651584 bytes (36 MB, 34 MiB) copied, 8.35522 s, 4.3 MB/s Copied 524288 bytes before swapping layout...