== sanity test 184c: Concurrent write and layout swap ==== 00:38:36 (1718858316) 40+0 records in 40+0 records out 41943040 bytes (42 MB) copied, 1.43638 s, 29.2 MB/s 47+0 records in 47+0 records out 49283072 bytes (49 MB) copied, 1.63543 s, 30.1 MB/s ref file size: ref1(41943040), ref2(49283072) 2560+0 records in 2560+0 records out 41943040 bytes (42 MB) copied, 2.87032 s, 14.6 MB/s Copied 1802240 bytes before swapping layout...