== sanity test 184c: Concurrent write and layout swap ==== 04:06:53 (1788941213) 28+0 records in 28+0 records out 29360128 bytes (29 MB, 28 MiB) copied, 4.82942 s, 6.1 MB/s 36+0 records in 36+0 records out 37748736 bytes (38 MB, 36 MiB) copied, 5.25394 s, 7.2 MB/s ref file size: ref1(29360128), ref2(37748736) 1792+0 records in 1792+0 records out 29360128 bytes (29 MB, 28 MiB) copied, 7.69986 s, 3.8 MB/s Copied 704512 bytes before swapping layout...