== sanity test 184c: Concurrent write and layout swap ==== 17:16:47 (1788815807) 20+0 records in 20+0 records out 20971520 bytes (21 MB, 20 MiB) copied, 1.95757 s, 10.7 MB/s 54+0 records in 54+0 records out 56623104 bytes (57 MB, 54 MiB) copied, 4.46565 s, 12.7 MB/s ref file size: ref1(20971520), ref2(56623104) 1280+0 records in 1280+0 records out 20971520 bytes (21 MB, 20 MiB) copied, 3.1211 s, 6.7 MB/s Copied 868352 bytes before swapping layout...