== sanity test 184c: Concurrent write and layout swap ==== 04:16:57 (1787905017) 39+0 records in 39+0 records out 40894464 bytes (41 MB, 39 MiB) copied, 6.27194 s, 6.5 MB/s 36+0 records in 36+0 records out 37748736 bytes (38 MB, 36 MiB) copied, 5.33415 s, 7.1 MB/s ref file size: ref1(40894464), ref2(37748736) 2496+0 records in 2496+0 records out 40894464 bytes (41 MB, 39 MiB) copied, 9.47014 s, 4.3 MB/s Copied 622592 bytes before swapping layout...