== sanity test 184c: Concurrent write and layout swap ==== 00:49:07 (1787114947) 36+0 records in 36+0 records out 37748736 bytes (38 MB, 36 MiB) copied, 5.83443 s, 6.5 MB/s 51+0 records in 51+0 records out 53477376 bytes (53 MB, 51 MiB) copied, 7.77103 s, 6.9 MB/s ref file size: ref1(37748736), ref2(53477376) 2304+0 records in 2304+0 records out 37748736 bytes (38 MB, 36 MiB) copied, 10.6311 s, 3.6 MB/s Copied 557056 bytes before swapping layout...