SwayDB

Type-safe & non-blocking key-value storage library for single/multiple disks and in-memory storage.

Performance

Storage type	Performance
Persistent	up to `308,000` writes/sec & `316,000` reads/sec
In memory	up to `653,000` writes/sec & `628,000` reads/sec

View detailed benchmark results here.

Features

Embeddable, Type-safe, non-blocking
Multiple disks, In-memory & periodically persistent
ACID like atomic writes with Batch API
APIs similar to Scala collections.
Expiring key-value (TTL).
Range update, remove & expire.
Key only iterations (Lazily fetched values)
Data storage formats
- Key-value (Map[K, V])
- Row (Set[T])
In-built custom serialization API with Slice
Configurable Levels
Configurable cache size
Concurrent level compaction
Optional Memory-mapped files
Scala Streams
Bloom filters
Fault tolerant

Demo

//Iteration: fetch all key-values withing range 10 to 90, update values and batch write updated key-values
db
  .from(10)
  .tillKey(_ <= 90)
  .map {
    case (key, value) =>
      (key, value + "_updated")
  } andThen {
     updatedKeyValues =>
       db.batchPut(updatedKeyValues)
  }

Quick start

Quick start demo.

Examples

Related GitHub projects

SwayDB.examples - Examples demonstrating features and APIs.
SwayDB.benchmark - Benchmarks for write and read performance.
SwayDB.stress - Stress tests.
SwayDB.io - Website code.

Status

Status: Beta

All core APIs for SwayDB are implemented. See the API documentation.

Next few versions require file formats changes to improve data compression.

Backward compatible will be supported for versions 1.* and after So please suggest features & improvements now while we are still in version 0.*.

TODO Code coverage & CI.

FRosner/SwayDB