== sanity test 184c: Concurrent write and layout swap ==== 20:46:10 (1788482770) 64+0 records in 64+0 records out 67108864 bytes (67 MB, 64 MiB) copied, 10.1602 s, 6.6 MB/s 20+0 records in 20+0 records out 20971520 bytes (21 MB, 20 MiB) copied, 2.66278 s, 7.9 MB/s ref file size: ref1(67108864), ref2(20971520) 4096+0 records in 4096+0 records out 67108864 bytes (67 MB, 64 MiB) copied, 15.5521 s, 4.3 MB/s Copied 475136 bytes before swapping layout...