== sanity test 184c: Concurrent write and layout swap ==== 07:32:00 (1788867120) 20+0 records in 20+0 records out 20971520 bytes (21 MB, 20 MiB) copied, 2.9321 s, 7.2 MB/s 34+0 records in 34+0 records out 35651584 bytes (36 MB, 34 MiB) copied, 5.01633 s, 7.1 MB/s ref file size: ref1(20971520), ref2(35651584) 1280+0 records in 1280+0 records out 20971520 bytes (21 MB, 20 MiB) copied, 4.73083 s, 4.4 MB/s Copied 638976 bytes before swapping layout...