== sanity test 184c: Concurrent write and layout swap ==== 03:51:34 (1788767494) 69+0 records in 69+0 records out 72351744 bytes (72 MB, 69 MiB) copied, 10.1139 s, 7.2 MB/s 25+0 records in 25+0 records out 26214400 bytes (26 MB, 25 MiB) copied, 3.18074 s, 8.2 MB/s ref file size: ref1(72351744), ref2(26214400) 4416+0 records in 4416+0 records out 72351744 bytes (72 MB, 69 MiB) copied, 21.1263 s, 3.4 MB/s Copied 655360 bytes before swapping layout...