== sanity test 184c: Concurrent write and layout swap ==== 07:35:16 (1789040116) 42+0 records in 42+0 records out 44040192 bytes (44 MB, 42 MiB) copied, 7.67795 s, 5.7 MB/s 64+0 records in 64+0 records out 67108864 bytes (67 MB, 64 MiB) copied, 11.8893 s, 5.6 MB/s ref file size: ref1(44040192), ref2(67108864) 2688+0 records in 2688+0 records out 44040192 bytes (44 MB, 42 MiB) copied, 14.2989 s, 3.1 MB/s Copied 393216 bytes before swapping layout...