在不使用PostgreSQL的情况下写入PostgreSQL数据库格式

I am collecting lots of data from lots of machines. These machines cannot run PostgreSQL and the cannot connect to a PostgreSQL database. At the moment I save the data from these machines in CSV files and use the COPY FROM command to import the data into the PostgreSQL database. Even on high-end hardware this process is taking hours. Therefore, I was thinking about writing the data to the format of PostgreSQL database directly. I would then simply copy these files into the /data directory, start the PostgreSQL server. The server would then find the database files and accept them as databases. I am collecting lots of data from lots of machi