== sanity test 184c: Concurrent write and layout swap ==== 00:31:51 (1781670711) 50+0 records in 50+0 records out 52428800 bytes (52 MB, 50 MiB) copied, 2.75126 s, 19.1 MB/s 30+0 records in 30+0 records out 31457280 bytes (31 MB, 30 MiB) copied, 1.76175 s, 17.9 MB/s ref file size: ref1(52428800), ref2(31457280) 3200+0 records in 3200+0 records out 52428800 bytes (52 MB, 50 MiB) copied, 6.01427 s, 8.7 MB/s Copied 1359872 bytes before swapping layout...