== sanity test 184c: Concurrent write and layout swap ==== 04:08:39 (1733648919) 64+0 records in 64+0 records out 67108864 bytes (67 MB) copied, 2.10018 s, 32.0 MB/s 29+0 records in 29+0 records out 30408704 bytes (30 MB) copied, 0.985765 s, 30.8 MB/s ref file size: ref1(67108864), ref2(30408704) 4096+0 records in 4096+0 records out 67108864 bytes (67 MB) copied, 3.77563 s, 17.8 MB/s Copied 1851392 bytes before swapping layout...