== sanity test 184c: Concurrent write and layout swap ==== 23:50:46 (1784951446) 26+0 records in 26+0 records out 27262976 bytes (27 MB, 26 MiB) copied, 2.1914 s, 12.4 MB/s 60+0 records in 60+0 records out 62914560 bytes (63 MB, 60 MiB) copied, 4.4611 s, 14.1 MB/s ref file size: ref1(27262976), ref2(62914560) 1664+0 records in 1664+0 records out 27262976 bytes (27 MB, 26 MiB) copied, 2.97921 s, 9.2 MB/s Copied 917504 bytes before swapping layout...