== sanity test 184c: Concurrent write and layout swap ==== 09:10:57 (1787145057) 38+0 records in 38+0 records out 39845888 bytes (40 MB, 38 MiB) copied, 5.78935 s, 6.9 MB/s 20+0 records in 20+0 records out 20971520 bytes (21 MB, 20 MiB) copied, 3.43502 s, 6.1 MB/s ref file size: ref1(39845888), ref2(20971520) 2432+0 records in 2432+0 records out 39845888 bytes (40 MB, 38 MiB) copied, 13.5864 s, 2.9 MB/s Copied 507904 bytes before swapping layout...