== sanity test 184c: Concurrent write and layout swap ==== 07:20:54 (1788952854) 27+0 records in 27+0 records out 28311552 bytes (28 MB, 27 MiB) copied, 4.30865 s, 6.6 MB/s 23+0 records in 23+0 records out 24117248 bytes (24 MB, 23 MiB) copied, 3.31144 s, 7.3 MB/s ref file size: ref1(28311552), ref2(24117248) 1728+0 records in 1728+0 records out 28311552 bytes (28 MB, 27 MiB) copied, 7.44455 s, 3.8 MB/s Copied 491520 bytes before swapping layout...