== sanity test 184c: Concurrent write and layout swap ==== 04:58:38 (1788857918) 49+0 records in 49+0 records out 51380224 bytes (51 MB, 49 MiB) copied, 9.19716 s, 5.6 MB/s 49+0 records in 49+0 records out 51380224 bytes (51 MB, 49 MiB) copied, 8.13488 s, 6.3 MB/s ref file size: ref1(51380224), ref2(51380224) 3136+0 records in 3136+0 records out 51380224 bytes (51 MB, 49 MiB) copied, 14.5573 s, 3.5 MB/s Copied 589824 bytes before swapping layout...