== sanity test 184c: Concurrent write and layout swap ==== 04:15:48 (1787904948) 61+0 records in 61+0 records out 63963136 bytes (64 MB, 61 MiB) copied, 11.1403 s, 5.7 MB/s 21+0 records in 21+0 records out 22020096 bytes (22 MB, 21 MiB) copied, 3.08726 s, 7.1 MB/s ref file size: ref1(63963136), ref2(22020096) 3904+0 records in 3904+0 records out 63963136 bytes (64 MB, 61 MiB) copied, 18.3724 s, 3.5 MB/s Copied 819200 bytes before swapping layout...