== sanity test 184c: Concurrent write and layout swap ==== 17:54:42 (1771973682) 28+0 records in 28+0 records out 29360128 bytes (29 MB, 28 MiB) copied, 0.415484 s, 70.7 MB/s 24+0 records in 24+0 records out 25165824 bytes (25 MB, 24 MiB) copied, 0.353989 s, 71.1 MB/s ref file size: ref1(29360128), ref2(25165824) 1792+0 records in 1792+0 records out 29360128 bytes (29 MB, 28 MiB) copied, 0.436776 s, 67.2 MB/s Copied 7847936 bytes before swapping layout...