== sanity test 184c: Concurrent write and layout swap ==== 04:51:42 (1788857502) 20+0 records in 20+0 records out 20971520 bytes (21 MB, 20 MiB) copied, 3.03705 s, 6.9 MB/s 26+0 records in 26+0 records out 27262976 bytes (27 MB, 26 MiB) copied, 4.25053 s, 6.4 MB/s ref file size: ref1(20971520), ref2(27262976) 1280+0 records in 1280+0 records out 20971520 bytes (21 MB, 20 MiB) copied, 7.17013 s, 2.9 MB/s Copied 360448 bytes before swapping layout...