https://www.uber.com/en-JP/blog/reducing-logging-cost-by-two-orders-of-magnitude-using-clp/
tldr: Uber created a CLP <https://github.com/y-scope/clp?uclick_id=e2bbfdc9-f79f-4d7a-999b-6e3c3ea19364> appender for log4j that compresses on the fly. Impressive 169x compression rate. Resulting compressed files are searchable because of embedded dictionaries.