== sanity test 184c: Concurrent write and layout swap ==== 19:38:50 (1781221130) 65+0 records in 65+0 records out 68157440 bytes (68 MB, 65 MiB) copied, 4.57324 s, 14.9 MB/s 55+0 records in 55+0 records out 57671680 bytes (58 MB, 55 MiB) copied, 3.83479 s, 15.0 MB/s ref file size: ref1(68157440), ref2(57671680) 4160+0 records in 4160+0 records out 68157440 bytes (68 MB, 65 MiB) copied, 8.93197 s, 7.6 MB/s Copied 753664 bytes before swapping layout...