Configuration and Logging ​

Ys supports an optional config file, ys.conf, which you can use to tune different aspects of your server.

Suppose we create a ys.conf. It should be in the root directory of the application using Ys.

NUM_THREADS=4
PORT=8000
LOG_LEVEL=debug
LOG_FILE=server.log

We've specified that the server should use a thread pool with 4 threads. It will listen on port 8000. Further, it will print logs up to and including the debug log-level, and will write said logs to a log file server.log.

If we omit the log file, the log messages will be printed to stderr.

For logging, there are three log-levels: info, debug, and verbose (in order of verbosity). By default, Ys will use info.