== sanity test 184c: Concurrent write and layout swap ==== 16:33:12 (1788294792) 69+0 records in 69+0 records out 72351744 bytes (72 MB, 69 MiB) copied, 9.11629 s, 7.9 MB/s 68+0 records in 68+0 records out 71303168 bytes (71 MB, 68 MiB) copied, 11.0181 s, 6.5 MB/s ref file size: ref1(72351744), ref2(71303168) 4416+0 records in 4416+0 records out 72351744 bytes (72 MB, 69 MiB) copied, 25.4524 s, 2.8 MB/s Copied 344064 bytes before swapping layout...