== sanity test 184c: Concurrent write and layout swap ==== 20:03:38 (1781222618) 20+0 records in 20+0 records out 20971520 bytes (21 MB, 20 MiB) copied, 1.35078 s, 15.5 MB/s 56+0 records in 56+0 records out 58720256 bytes (59 MB, 56 MiB) copied, 3.70658 s, 15.8 MB/s ref file size: ref1(20971520), ref2(58720256) 1280+0 records in 1280+0 records out 20971520 bytes (21 MB, 20 MiB) copied, 2.8898 s, 7.3 MB/s Copied 1015808 bytes before swapping layout...