In-memory time-series log store to help with local debugging

I am searching for a personal project, that I can build with Rust as i teach myself the language. I am trying to focus on a project that would benefit from its speed, while also making developer productivity smoother in an otherwise difficult area

So with those goals, i am looking to build an in-memory time-series data store for log files and provide an easy search-ability that should be several order better than trying grep on multiple files for local development environments. I have done my fair share of customer log analysis, or cloud development where there are logs from several components. The tool would ingest these logs and allow to quickly search on a time window across different components. I do not want to build a service, but either a CLI based tool or maybe a nodeJS UI frontend that can talk to to this in-memory local db store

Any takers?