== sanity test 184c: Concurrent write and layout swap ==== 01:25:18 (1781241918) 40+0 records in 40+0 records out 41943040 bytes (42 MB, 40 MiB) copied, 5.15336 s, 8.1 MB/s 37+0 records in 37+0 records out 38797312 bytes (39 MB, 37 MiB) copied, 6.01243 s, 6.5 MB/s ref file size: ref1(41943040), ref2(38797312) 2560+0 records in 2560+0 records out 41943040 bytes (42 MB, 40 MiB) copied, 14.366 s, 2.9 MB/s Copied 311296 bytes before swapping layout...