Data processing with reliability
Previously defined in the Buffering concept section, the buffer phase in the pipeline aims to provide a unified and persistent mechanism to store your data, either using the primary in-memory model or using the filesystem based mode.
The buffer phase already contains the data in an immutable state, meaning, no other filter can be applied.
Note that buffered data is not longer a raw text, instead it's in Fluent Bit internal binary representation.
Fluent Bit offers a buffering mechanism in the file system that acts as a backup system to avoid data loss in case of system failures.