Jonathan Ellis created CASSANDRA-18517:
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Summary: Make Cassandra more user-friendly (admin-friendly) by
cleaning up logging
Key: CASSANDRA-18517
URL: https://issues.apache.org/jira/browse/CASSANDRA-18517
Project: Cassandra
Issue Type: Bug
Components: Observability/Logging
Reporter: Jonathan Ellis
Assignee: Jonathan Ellis
At a very high level we see two types of users:
1. Early adopters generally want to understand Cassandra's design, how the
pieces fit together, and why
2. Mainstream users just want it to work, preferably with as little attention
from them as possible
Group 1 loves verbose logs because it helps them figure out what's going on
under the hood. Group 2 sees verbose logs as intimidating ("this is going to
be hard") if not scary ("this isn't debugged enough yet").
Early on, group 1 users predominate. But there's way more group 2 users out
there now and as Cassandra sees more adoption it will primarily come from them.
It's time to start optimizing for group 2. Group 1 is, after all, completely
capable of adjusting the log levels themselves when necessary.
A good rule of thumb is, "is this necessary information for my day-to-day
operation of the system." If not, it should be at debug (or sometimes trace).
Compare [our startup
logging|https://gist.githubusercontent.com/jbellis/a1f324c145c4d46c3409969393b24077/raw/a767e4b92c29a51130940326de619a3c418096b7/gistfile1.txt]
with
[postgresql's.|https://gist.githubusercontent.com/jbellis/a9585d3f04f49c7e3685c9122975d51b/raw/beea37fd0834d1c8f38e5c1667623aa37598d3dd/gistfile1.txt]
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