Requirements

This page describes the required tools and their versions to use ScalarDL correctly.

Client SDK

Because ScalarDL is written in Java, the easiest way to interact with ScalarDL is to use the Java client SDK.

Java

The following Java Development Kits (JDKs) are verified and supported:

• Oracle JDK: 8, 11, 17, or 21 (LTS versions)
• OpenJDK (Eclipse Temurin, Amazon Corretto, or Microsoft Build of OpenJDK): 8, 11, 17, or 21 (LTS versions)

Other languages

ScalarDL uses gRPC, so you can create your own client by using the generated clients of your preferred languages.

Databases

ScalarDL is middleware that runs on top of the following databases and their versions.

Relational databases

Oracle Database

Version	Oracle Database 23ai	Oracle Database 21c	Oracle Database 19c
ScalarDL 3.12	✅	✅	✅
ScalarDL 3.11	✅	✅	✅
ScalarDL 3.10	✅	✅	✅
ScalarDL 3.9	✅	✅	✅

Db2

Version	Db2 12.1	Db2 11.5
ScalarDL 3.12	✅	✅
ScalarDL 3.11	❌	❌
ScalarDL 3.10	❌	❌
ScalarDL 3.9	❌	❌

MySQL

Version	MySQL 8.4	MySQL 8.0
ScalarDL 3.12	✅	✅
ScalarDL 3.11	✅	✅
ScalarDL 3.10	✅	✅
ScalarDL 3.9	✅	✅

PostgreSQL

Version	PostgreSQL 17	PostgreSQL 16	PostgreSQL 15	PostgreSQL 14	PostgreSQL 13
ScalarDL 3.12	✅	✅	✅	✅	✅
ScalarDL 3.11	✅	✅	✅	✅	✅
ScalarDL 3.10	✅	✅	✅	✅	✅
ScalarDL 3.9	✅	✅	✅	✅	✅

Amazon Aurora MySQL

Version	Aurora MySQL 3	Aurora MySQL 2
ScalarDL 3.12	✅	✅
ScalarDL 3.11	✅	✅
ScalarDL 3.10	✅	✅
ScalarDL 3.9	✅	✅

Amazon Aurora PostgreSQL

Version	Aurora PostgreSQL 16	Aurora PostgreSQL 15	Aurora PostgreSQL 14	Aurora PostgreSQL 13
ScalarDL 3.12	✅	✅	✅	✅
ScalarDL 3.11	✅	✅	✅	✅
ScalarDL 3.10	✅	✅	✅	✅
ScalarDL 3.9	✅	✅	✅	✅

MariaDB

Version	MariaDB 11.4	MariaDB 10.11
ScalarDL 3.12	✅	✅
ScalarDL 3.11	✅	✅
ScalarDL 3.10	✅	✅
ScalarDL 3.9	✅	✅

SQL Server

Version	SQL Server 2022	SQL Server 2019	SQL Server 2017
ScalarDL 3.12	✅	✅	✅
ScalarDL 3.11	✅	✅	✅
ScalarDL 3.10	✅	✅	✅
ScalarDL 3.9	✅	✅	✅

SQLite

Version	SQLite 3
ScalarDL 3.12	✅
ScalarDL 3.11	✅
ScalarDL 3.10	✅
ScalarDL 3.9	✅

YugabyteDB

Version	YugabyteDB 2
ScalarDL 3.12	✅
ScalarDL 3.11	✅
ScalarDL 3.10	✅
ScalarDL 3.9	❌

NoSQL databases

Amazon DynamoDB

Version	DynamoDB
ScalarDL 3.12	✅
ScalarDL 3.11	✅
ScalarDL 3.10	✅
ScalarDL 3.9	✅

Apache Cassandra

Version	Cassandra 4.1	Cassandra 4.0	Cassandra 3.11	Cassandra 3.0
ScalarDL 3.12	❌	❌	✅	✅
ScalarDL 3.11	❌	❌	✅	✅
ScalarDL 3.10	❌	❌	✅	✅
ScalarDL 3.9	❌	❌	✅	✅

Azure Cosmos DB for NoSQL

Version	Cosmos DB for NoSQL
ScalarDL 3.12	✅
ScalarDL 3.11	✅
ScalarDL 3.10	✅
ScalarDL 3.9	✅

note

ScalarDL uses ScalarDB to abstract underlying databases. For details on how to configure each database, see Configurations for the Underlying Databases of ScalarDB.

The following list shows the versions of ScalarDB used in ScalarDL internally. This version list will help you if:

• You want to know what available backend databases you can use in ScalarDL. For details about which backend databases are supported and can be used in ScalarDL based on the version of ScalarDB, see the list of databases that ScalarDB supports.
• You want to know what ScalarDB APIs are available for the Function feature in ScalarDL.

ScalarDL version	ScalarDB version
3.12	3.16
3.11	3.15
3.10	3.14
3.9	3.12

Required ports

ScalarDL requires the following ports to be accessible. These default port numbers can be configured as needed:

• ScalarDL Ledger
  • 50051 (normal request)
  • 50052 (privileged request)
  • 50053 (pause request)
  • 8080 (metrics)
• ScalarDL Auditor
  • 40051 (normal request)
  • 40052 (privileged request)
  • 40053 (pause request)
  • 8080 (metrics)
• ScalarDL Gateway
  • 30051 (normal request)
  • 30052 (privileged request)
  • 30053 (pause request)
  • 8080 (metrics)

Kubernetes

ScalarDL is provided as a Pod on the Kubernetes platform in production environments. ScalarDL supports the following platforms and tools.

Platform

• Kubernetes: 1.31 - 1.34
  • Amazon Elastic Kubernetes Service (EKS)
  • Azure Kubernetes Service (AKS)
• Red Hat OpenShift: TBD

Package manager

• Helm: 3.5+