Without us knowing about the kind of data you have, where it comes from, etc. It is pretty impossible for us to help.
InfluxDB is a timeseries db so if you have time-based data, push it into there because it makes it trivial to get time-based analytics out again. If the data is some other structure, push it into a relational db maybe. 350k entries is a lot to handle every 24hrs and it would be generally better to only get updates.
InfluxDB and Grafana will be a lot more efficient at handling large data than Node-RED will be natively.
