Vector Databases · infinispan

infinispan

Infinispan is an open-source, distributed in-memory database that stores and manages data across clustered nodes with support for both volatile caching and persistent storage. It handles key-value operations, offers vector database capabilities, and scales elastically while maintaining high availability and fault tolerance.

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Source: GitHub — github.com/infinispan/infinispan

1.3k

GitHub stars

653

Forks

Java

Primary language

Apache-2.0

License (OSI-approved)

Key facts

Objective fields from the source. Values we can't verify are shown as “Unknown” rather than guessed.

Field	Value
Repository	infinispan/infinispan
Owner	infinispan
Primary language	Java
License	Apache-2.0 — OSI-approved
Stars	1.3k
Forks	653
Open issues	444
Latest release	16.2.1 (2026-06-04)
Last updated	2026-07-08
Source	https://github.com/infinispan/infinispan

What infinispan is

Java-based distributed data grid providing in-memory storage with optional persistence, clustering via network distribution, and NoSQL querying (including semantic/vector search). Supports JVM 17–25 and deploys as embedded library or standalone server with configurable consistency and replication semantics.

Quickstart

Get the infinispan source

Clone the repository and explore it locally.

terminalbash

1git clone https://github.com/infinispan/infinispan.git2cd infinispan3# follow the project's README for install & configuration

Need it deployed, integrated, or customized instead? DEV.co ships production installs.

Best use cases

Session & Cache Layer

Ideal as a distributed cache for session storage, HTTP session replication, and frequently accessed data layers in web applications and microservices, reducing database load.

Real-Time Data Processing

Suitable for applications requiring low-latency in-memory analytics, event stream processing, and temporal data queries across horizontally scaled clusters.

High-Availability NoSQL Store

Effective as a persistent distributed database alternative for key-value workloads where eventual consistency, replication, and elastic scaling are acceptable trade-offs.

Implementation considerations

Cluster topology and replication strategy (synchronous vs. asynchronous, consistency levels) must be designed upfront; misconfiguration degrades both performance and fault tolerance.
Embedded vs. server mode trade-off: embedded reduces network latency but complicates dependency management and scaling; server mode requires separate infrastructure.
Memory sizing and eviction policies are critical; unbounded growth causes node failures; monitor heap usage and configure appropriate expiration/max-entries.
Persistence configuration (RocksDB, JDBC, etc.) adds latency and storage overhead; evaluate impact on write throughput for your access patterns.
Java version lock-in (JVM 17–25) and Maven Central dependency management require compatible build infrastructure.

When to avoid it — and what to weigh

ACID Transactions Required — If your workload demands strong ACID guarantees and distributed transactions, Infinispan's eventual consistency model and limited transactional scope may not suffice.
Complex SQL Queries — Not suited for applications heavily dependent on complex SQL joins, aggregations, or relational schemas; Infinispan is primarily key-value with optional Ickle query language.
Small Single-Node Deployments — Overhead of clustering, replication, and distributed coordination makes Infinispan impractical for simple single-server caching; lighter libraries (Redis, Memcached) are more efficient.
Non-JVM Ecosystems — Primary language is Java with JVM requirement (17–25); integration into purely non-JVM stacks requires client libraries and network protocols, adding operational complexity.

License & commercial use

Licensed under Apache License 2.0 (Apache-2.0), an OSI-approved permissive open-source license. Commercial use, modification, and distribution are permitted under standard Apache 2.0 terms.

Apache 2.0 explicitly permits commercial use, modification, and distribution. No commercial license agreement or proprietary restrictions are evident from the repository. Verify any vendor support or SLA requirements separately, as they are not covered by the license itself.

DEV.co evaluation signals

Editorial assessment — not user reviews. Directional, with an explicit confidence level.

Signal	Assessment
Maintenance	Active
Documentation	Adequate
License clarity	Clear
Deployment complexity	Moderate
DEV.co fit	Good
Assessment confidence	High

Security considerations

No explicit security vulnerabilities or audit details are provided in the data. Review official security policy, check CVE history, and verify authentication/encryption mechanisms (TLS, SASL) are enabled in production. Cluster-internal communication should be encrypted and authenticated; evaluate network isolation requirements. OpenSSF Best Practices badge suggests baseline security practices are documented.

Alternatives to consider

Redis

Simpler, single-threaded, lower operational overhead for pure caching; lacks built-in clustering and Java-ecosystem integration; no persistence-as-default model.

Apache Ignite

Similar distributed data grid capabilities with stronger SQL support and in-memory computing (compute grid); comparable complexity; more mature machine-learning integrations.

Memcached

Ultra-lightweight, pure cache-only, minimal configuration; no persistence, no advanced query, no replication; ideal for simple session stores in non-critical paths.

Software development agency

Build on infinispan with DEV.co software developers

Start with the official getting-started guide at infinispan.org. Assess your clustering, persistence, and consistency requirements. Contact our team if you need help architecting a distributed cache or NoSQL layer for your platform.

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infinispan FAQ

Can I use Infinispan without a JVM?

Not natively. Infinispan is Java-based and requires JVM 17–25. Non-JVM clients must use network protocols (Hot Rod, REST) to communicate; feature set and performance differ from Java SDK.

Is Infinispan suitable for a multi-datacenter setup?

Yes, but requires explicit cross-site replication configuration. Asynchronous replication is supported; data consistency across sites depends on your strategy (eventual vs. strong). Operational overhead is non-trivial.

How does Infinispan differ from a traditional SQL database?

Infinispan is a NoSQL key-value store optimized for in-memory speed and horizontal scaling. It lacks complex SQL joins and ACID transactions; trade-off is simplicity and performance for eventual consistency and flexible schemas.

What is the licensing cost?

Apache 2.0 license is free and permissive. No license fees apply. Vendor support (if any) is separate; review commercial support options directly with the maintainers or related organizations.

Software developers & web developers for hire

DEV.co helps companies turn open-source tools like infinispan into production software. Our software development services cover the full lifecycle — architecture, web development, integration, and maintenance — delivered by software developers and web developers who ship. Engage our software development agency to implement or customize it for your vector databases stack.

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