== sanity test 184c: Concurrent write and layout swap ==== 21:36:18 (1787880978) 61+0 records in 61+0 records out 63963136 bytes (64 MB, 61 MiB) copied, 10.7849 s, 5.9 MB/s 48+0 records in 48+0 records out 50331648 bytes (50 MB, 48 MiB) copied, 8.4984 s, 5.9 MB/s ref file size: ref1(63963136), ref2(50331648) 3904+0 records in 3904+0 records out 63963136 bytes (64 MB, 61 MiB) copied, 21.4623 s, 3.0 MB/s Copied 638976 bytes before swapping layout...