Hi team, I want to know where the info of datahub stores in, such as metadata, data, logs, etc., can anyone help?

Generally, the data is stored in mysql database. Some ‘time-series’ information is also stored in the Elastic Search. Alternative to mysql, some deployments use Postgres or MariaDB Some deployments choose neo4j, in which case that is another location where datahub stores metadata. To get an idea you can check: https://datahubproject.io/docs/docker or https://datahubproject.io/docs/deploy/kubernetes

@gorgeous-tent-62316 Thank you for reply. What can I do if I want to visit the database directly? How to find the location of the DB?

You have not mentioned your deployment setup. So, presuming it is local testing, in which case, see this link: https://datahubproject.io/docs/troubleshooting/quickstart/#how-can-i-check-if-data-has-been-loaded-into-mysql-properly