Choosing a logging library

- [Instructor] When choosing a logging library,…there are a number of features that you should consider.…We'll start with how the log should be formatted.…For each log entry, what data points,…if any, will you include?…Do you need to customize your log format?…Do you need to use a standard…like the NCSA common log format?…What about writing structured data in formats like JSON?…There's the severity of a log entry.…Node's console supports two logging levels,…normal and error.…There's a pseudo warn that is also an error.…

In comparison, a common standard is RFC 5425,…which defines syslog severities,…including eight different severities.…Syslog severities start at debuging, the least severe,…then informational, notice, and warning.…Then we start getting into the error conditions,…escalating through critical, alert, and finally, emergency.…You don't need to memorize these,…but knowing the hierarchy and granularity…of severities in whatever system you're using is important.…

Log levels communicate meaning,…and here's some of the examples of how.…