Advanced User Guide

• Sampling: Discard some traces or spans to manage data storage and analysis efficiently, including setting up the trace_sample_rate.
• Scrubbing: Automatically redact sensitive information from your logs and spans using customizable patterns and callbacks.
• Testing: Verify your application's logging and span tracking with Logfire's testing utilities, ensuring accurate data capture and observability.
• Backfill: Recover lost data and bulk load historical data into Logfire with the logfire backfill command, ensuring data continuity.
• Creating Write Tokens: Generate and manage multiple write tokens for different services.
• Using Read Tokens: Generate and manage read tokens for programmatic querying of your Logfire data.