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Apache Ignite
What it is
Apache Ignite is a free, open-source, memory-first distributed SQL database for high-velocity workloads. It supports ACID transactions across partitions with Raft consensus, while MVCC snapshot isolation enables non-blocking reads. Data is held primarily in memory, with persistence available through AIPERSIST. SQL access includes JDBC drivers, a Table API, and native APIs; catalog-driven schema management supports changes such as adding columns or modifying indexes without stopping a cluster. DataStreamer handles high-throughput writes with backpressure control. Native clients are listed for Java, .NET, C++, and Python, and extensions are available for AWS, Azure, GCE, and Spring. Operational features include authentication, SSL/TLS, OpenTelemetry metrics, recovery snapshots, and backups. Listed applications include event stream processing, microservices state management, session management, and AI/ML feature stores. The project offers binary, source, Docker, and Maven/Gradle download options. Its download page identifies Ignite 2 as a long-term support release recommended for existing deployments.
For and against
For
- ACID transactions span partitions
- MVCC enables non-blocking reads
- Schema changes can avoid cluster downtime
- Native clients include Java, .NET, C++, and Python
- Includes snapshots and backups
Against
- Data is primarily stored in memory
- Ignite 2 is the recommended long-term support release for existing deployments
The verdict
Apache Ignite combines in-memory data, distributed transactions, SQL access, and streaming writes. Teams considering it should note the memory-first storage model and the stated recommendation for existing deployments.
Who it suits
It suits teams building high-velocity data applications that need distributed SQL, transactions, or streaming writes. The listed use cases include event processing, session management, and AI/ML feature stores.
Plans and prices
Apache Ignite
Apache Ignite 3.1.0 download · Ignite 2 long-term support release · Binary, source, Docker, and Maven/Gradle options
Read 9 Oct 2026 · ignite.apache.org
On the record
- ACID transactions
- The platform provides ACID transactions across partitions using MVCC snapshot isolation and distributed replication.ignite.apache.org · read 15 Oct 2026
- Concurrency
- MVCC snapshot isolation enables non-blocking reads.ignite.apache.org · read 9 Oct 2026
- Data placement
- Colocation annotations and distribution zones keep related data together and control replica placement.ignite.apache.org · read 15 Oct 2026
- Deployment
- Ignite can run on bare metal, virtual machines, Docker, Kubernetes and cloud environments, with thick and thin clients plus JDBC, ODBC and REST access.ignite.apache.org · read 15 Oct 2026
- Distributed replication
- Ignite replicates partitions through Raft groups with leaders and followers to provide durability and availability.ignite.apache.org · read 15 Oct 2026
- Documentation
- The documentation site provides quick starts and API references for Java, SQL, REST, C#/.NET, C++, Python, Node.js and PHP.ignite.apache.org · read 15 Oct 2026
- In-place processing
- Compute jobs can execute on nodes holding the relevant data to reduce network transfer.ignite.apache.org · read 15 Oct 2026
- Integration modules
- Documented integrations include Kafka, Kubernetes, Spark, Spring Data, AWS, Azure, GCE, ZooKeeper and REST HTTP.ignite.apache.org · read 15 Oct 2026
- Integrations
- The download page lists AWS, Azure, GCE, and Spring extensions, including Spring Cache and Spring Data extensions.ignite.apache.org · read 9 Oct 2026
- JDBC API
- Ignite 3 ships a JDBC driver using class org.apache.ignite.jdbc.IgniteJdbcDriver for distributed SQL operations.ignite.apache.org · read 15 Oct 2026
- Languages
- The project lists native clients for Java, .NET, C++, and Python.ignite.apache.org · read 9 Oct 2026
- Language support
- Official materials list Java, .NET, C++, Python and SQL/CLI access.ignite.apache.org · read 15 Oct 2026
- Latest release
- The download page identifies Apache Ignite 2.18.0 as the latest 2.x release and lists its release date as 2026-04-26.ignite.apache.org · read 15 Oct 2026
- License
- The project source is licensed under the Apache License 2.0, with some bundled components under separate licenses.github.com · read 15 Oct 2026
- Limit: Gartner complaints
- Gartner reviewers report slow support responses, high RAM cost requiring optimization, and missing Delta and Apache Arrow integrations.gartner.com · read 15 Oct 2026
- Limit: learning curve and documentation
- G2 reviewers repeatedly describe a steep learning curve and documentation that could be easier to use.g2.com · read 15 Oct 2026
- Limit: operational overhead
- A G2 reviewer says distributed-cluster setup can outweigh the benefits for simple or small projects.g2.com · read 15 Oct 2026
- Maker founded
- The Apache Software Foundation was established in 1999.linkedin.com · read 15 Oct 2026
