== sanity test 184c: Concurrent write and layout swap ==== 01:27:37 (1763360857) 50+0 records in 50+0 records out 52428800 bytes (52 MB, 50 MiB) copied, 2.96192 s, 17.7 MB/s 51+0 records in 51+0 records out 53477376 bytes (53 MB, 51 MiB) copied, 3.07377 s, 17.4 MB/s ref file size: ref1(52428800), ref2(53477376) 3200+0 records in 3200+0 records out 52428800 bytes (52 MB, 50 MiB) copied, 4.83784 s, 10.8 MB/s Copied 1163264 bytes before swapping layout...