Extremofile is single binary value persistent storage that makes best effort to read your data back unchanged.

Answer yes to all questions:

• Need to persist small amount of data? It costs 2 full data writes + fsync on each store operation.
• Expect power loss or storage media degradation? If you have reliable power supply and storage, that's awesome.
• Network backup is not available? If you have robust remote database available when you need it, that's great.

Failure modes tolerated:

• power loss
• random data corrupted in one replica

Failure modes detected:

• almost any data corruption, limited to checksum mismatch

Failures not handled by design: human error, files deleted.

• You only get valid value bytes.
• You may get value/writer together with non-critical error.
• Internal storage format may change with major version.
• Library will read one previous storage format.
• Thread-safe.
• Not safe to use by multiple processes, data may be corrupted.

• Why not SQLite or goleveldb or X?

  I could not find a ready solution that actually survives storage media degradation, rather than just reporting error. If you need similar durability with complex data structure, wrap your database of choice with automatic backup.