== sanity test 184c: Concurrent write and layout swap ==== 09:07:20 (1779714440) 35+0 records in 35+0 records out 36700160 bytes (37 MB, 35 MiB) copied, 5.28795 s, 6.9 MB/s 51+0 records in 51+0 records out 53477376 bytes (53 MB, 51 MiB) copied, 7.51162 s, 7.1 MB/s ref file size: ref1(36700160), ref2(53477376) 2240+0 records in 2240+0 records out 36700160 bytes (37 MB, 35 MiB) copied, 11.7215 s, 3.1 MB/s Copied 491520 bytes before swapping layout...