== sanity test 184c: Concurrent write and layout swap ==== 17:46:13 (1784238373) 30+0 records in 30+0 records out 31457280 bytes (31 MB, 30 MiB) copied, 4.38682 s, 7.2 MB/s 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 6.74608 s, 7.5 MB/s ref file size: ref1(31457280), ref2(50331648) 1920+0 records in 1920+0 records out 31457280 bytes (31 MB, 30 MiB) copied, 9.54494 s, 3.3 MB/s Copied 622592 bytes before swapping layout...