== sanity test 184c: Concurrent write and layout swap ==== 06:36:24 (1789036584) 61+0 records in 61+0 records out 63963136 bytes (64 MB, 61 MiB) copied, 10.9948 s, 5.8 MB/s 22+0 records in 22+0 records out 23068672 bytes (23 MB, 22 MiB) copied, 3.94463 s, 5.8 MB/s ref file size: ref1(63963136), ref2(23068672) 3904+0 records in 3904+0 records out 63963136 bytes (64 MB, 61 MiB) copied, 25.5542 s, 2.5 MB/s Copied 540672 bytes before swapping layout...