Logs are kept as text files and in a MySQL database (as of v3, which should be released soon™) Searching logs is currently being worked on, you can see an MVP

Logs are kept as text files and in a MySQL database (as of v3, which should be released soon™) Searching logs is currently being worked on, you can see an MVP here - https://github.com/thelounge/thelounge/pull/2627 https://github.com/thelounge/thelounge/pull/2627