# Kafka Streams: How to use Speedb instead of RocksDB?

By default, Kafka streams uses RocksDB for state store. Speedb is a fully compatible fork of RocksDB that introduces overall performance improvements when used instead. By replacing RocksDB with Speedb you can enjoy the improved performance Speedb offers. <br>

There are 3 options for replacement of RocksDB in Kafka 3.3 and higher:

1. Rebuild Kafka streams with Speedb
2. Replace the RocksDB library with Speedb library
3. Use the prebuilt Kafka+Speedb version&#x20;

### Rebuild Kafka with Speedb

If you are building from source, you need to modify gradle/dependencies.gradle to point to Speedb instead of RocksDB and indicate version 2.4.1.5 instead of 7.1.2:

\- rocksDBJni: "org.rocksdb:rocksdbjni:$versions.rocksDB",&#x20;

\+ rocksDBJni: "io.github.speedb-io:speedbjni:$versions.rocksDB",&#x20;

\- rocksDB: "7.1.2",&#x20;

\+ rocksDB: "2.4.1.5",<br>

### Replace the library

If you are using a prebuilt  Kafka version, replace the file libs/rocksdbjni-7.1.2.jar with the jar downloaded from maven at the following URL:

[https://repo1.maven.org/maven2/io/github/speedb-io/speedbjni/2.4.1.5/](https://repo1.maven.org/maven2/io/github/speedb-io/speedbjni/2.4.1.1/)&#x20;

(the downloaded speedbjni file should be renamed to rocksdbjni-7.1.2.jar)

### Use the prebuilt Kafka+Speedb version&#x20;

Click [Here](https://storage.googleapis.com/speedb-artifacts/kafka/213_26/kafka_2.13-3.5.1.tgz) to download the latest compiled version.&#x20;

<br>


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