It's not as clearcut as that. RocksDB gives better write performance up to record sizes of about 1/4 page size. Above that size, LMDB write performance is superior.

http://www.lmdb.tech/bench/ondisk/

Also the InfluxDB blog post is missing quite a lot of discussion that originally occurred here https://disqus.com/home/discussion/influxdb/benchmarking_lev...