== sanity test 184c: Concurrent write and layout swap ==== 18:35:06 (1751322906) 28+0 records in 28+0 records out 29360128 bytes (29 MB) copied, 0.36046 s, 81.5 MB/s 47+0 records in 47+0 records out 49283072 bytes (49 MB) copied, 0.555996 s, 88.6 MB/s ref file size: ref1(29360128), ref2(49283072) 1792+0 records in 1792+0 records out 29360128 bytes (29 MB) copied, 0.409758 s, 71.7 MB/s Copied 8323072 bytes before swapping layout...