IODB is embedded storage engine designed for blockchain applications. It is inspired by RocksDB. It provides ordered key-value store, it is similar to SortedMap<byte[], byte[]>. Its main advantage are snapshots with branching and fast rollbacks.

Main features include:

• Ordered key-value store
• Written in Scala, functional interface
• Multi-threaded background compaction
• Very fast durable commits
• Atomic updates with MVCC isolation and crash protection
• Snapshots with branching and rollbacks
• Log structured storage, old data are never overwritten for improved crash protection

IODB builds are available in Maven repository. Maven dependency snippet is bellow, replace $VERSION with :

<dependency>
    <groupId>org.scorexfoundation</groupId>
    <artifactId>iodb_2.12</artifactId>
    <version>$VERSION</version>
</dependency>

Code examples are in the src/test/scala/examples folder.

Documentation is in the doc folder.

IODB works with Intellij IDEA with Scala plugin.

• Checkout IODB:

git clone https://github.com/input-output-hk/iodb.git

• Install SBT

• Compile IODB and install JAR files into local repository:

sbt publish