04:48:08 @hyc Will any journaled file system be able to guarantee ordered writes? I know that most journaled file systems do not journal file data, just metadata, so probably not... 04:48:25 What makes ext3 / ext4 different that they can guarantee ordered writes? 05:51:16 http://www.lmdb.tech/bench/microbench/july/#sec11 05:51:16 Not the answer youre looking for, but the benchmarks are here 06:24:10 In the past, EXT4 did privilege performance over data integrity hence I did not use EXT* since a LONG time. Trust fast to lose, long to gain. 06:27:11 I think it was something about write barriers disabled by default back when it was new. Was good to make it look better in benchmarks 20:25:41 does anyone know where is defined output_data_t struct ? found it in db_lmdb.cpp 20:26:20 blockchain_db.h 20:26:39 thx u 22:31:01 git grep output_data_t | grep -E typedef\|class\|struct will usually find it.