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README

Apache Ignite

GitHub commit activity

Ignite 2.x and 3.x

This repository is Ignite 2
See apache/ignite-3 for Ignite 3
Both versions are actively developed

What is Apache Ignite?

Apache Ignite is a distributed database for high-performance computing with in-memory speed.

<a href="https://ignite.apache.org">
    <img src="https://github.com/apache/ignite-website/blob/master/docs/2.9.0/images/ignite_clustering.png" width="400px"/>
</a>

Multi-Tier Storage

Apache Ignite is designed to work with memory, disk, and Intel Optane as active storage tiers. The memory tier allows using DRAM and Intel® Optane™ operating in the Memory Mode for data storage and processing needs. The disk tier is optional with the support of two options -- you can persist data in an external database or keep it in the Ignite native persistence. SSD, Flash, HDD, or Intel Optane operating in the AppDirect Mode can be used as a storage device.

Ignite Native Persistence

Even though Apache Ignite is broadly used as a caching layer on top of external databases, it comes with its native persistence - a distributed, ACID, and SQL-compliant disk-based store. The native persistence integrates into the Ignite multi-tier storage as a disk tier that can be turned on to let Ignite store more data on disk than it can cache in memory and to enable fast cluster restarts.

ACID Compliance

Data stored in Ignite is ACID-compliant both in memory and on disk, making Ignite a strongly consistent system. Ignite transactions work across the network and can span multiple servers.

ANSI SQL Support

Apache Ignite comes with a ANSI-99 compliant, horizontally scalable, and fault-tolerant SQL engine that allows you to interact with Ignite as with a regular SQL database using JDBC, ODBC drivers, or native SQL APIs available for Java, C#, C++, Python, and other programming languages. Ignite supports all DML commands, including SELECT, UPDATE, INSERT, and DELETE queries as well as a subset of DDL commands relevant for distributed systems.

High-Performance Computing

High-performance computing (HPC) is the ability to process data and perform complex calculations at high speeds. Using Apache Ignite as a high-performance compute cluster, you can turn a group of commodity machines or a cloud environment into a distributed supercomputer of interconnected Ignite nodes. Ignite enables speed and scale by processing records in memory and reducing network utilization with APIs for data and compute-intensive calculations. Those APIs implement the MapReduce paradigm and allow you to run arbitrary tasks across the cluster of nodes.

Extension points exported contracts — how you extend this code

DmlArgument (Interface)

DML argument [202 implementers]

modules/indexing/src/main/java/org/apache/ignite/internal/processors/query/h2/dml/DmlArgument.java

Assertion (Interface)

An Assertion is a condition that is expected to be true. Failing that, an implementation should throw an {@link [233 implementers]

modules/core/src/test/java/org/apache/ignite/testframework/assertions/Assertion.java

GridOffHeapEventListener (Interface)

Off-heap event listener. [56 implementers]

modules/unsafe/src/main/java/org/apache/ignite/internal/util/offheap/GridOffHeapEventListener.java

RuntimeIndex (Interface)

Runtime index interface. The temporary index is built and available only on query execution. Not stored at the schema. [33 …

modules/calcite/src/main/java/org/apache/ignite/internal/processors/query/calcite/exec/RuntimeIndex.java

CacheTmLookup (Interface)

Allows grid to use different transactional systems. Implement this interface to look up native transaction manager withi [11 …

modules/jta/src/main/java/org/apache/ignite/cache/jta/CacheTmLookup.java

CtxServiceInterface (Interface)

Service for testing the attributes of a service call context. [15 implementers]

modules/compatibility/src/test/java/org/apache/ignite/compatibility/clients/JavaThinCompatibilityTest.java

MarshallerContext (Interface)

Marshaller context. [12 implementers]

modules/binary/api/src/main/java/org/apache/ignite/marshaller/MarshallerContext.java

NumaAllocationStrategy (Interface)

Basic interface for allocating memory on NUMA nodes with different policies using libnuma. [9 implementers]

modules/numa-allocator/src/main/java/org/apache/ignite/mem/NumaAllocationStrategy.java

Core symbols most depended-on inside this repo

grid

called by 6941

modules/core/src/main/java/org/apache/ignite/plugin/PluginContext.java

get

called by 6645

modules/core/src/test/java/org/apache/ignite/internal/processors/cache/ClientSlowDiscoveryTransactionRemapTest.java

cache

called by 6307

modules/core/src/main/java/org/apache/ignite/Ignite.java

equals

called by 5239

modules/binary/api/src/main/java/org/apache/ignite/internal/binary/BinaryIdentityResolver.java

context

called by 3929

modules/core/src/main/java/org/apache/ignite/internal/IgniteEx.java

info

called by 3926

modules/core/src/main/java/org/apache/ignite/internal/processors/cache/GridCacheEntryEx.java

add

called by 3674

modules/core/src/main/java/org/apache/ignite/IgniteSet.java

getName

called by 3641

modules/core/src/main/java/org/apache/ignite/spi/IgniteSpi.java

Shape

Method 115,481

Class 16,162

Function 1,566

Interface 1,221

Enum 469

Route 2

Languages

Java88%

C#7%

C++4%

Python1%

TypeScript1%

Ruby1%

Modules by API surface

modules/calcite/src/main/java/org/apache/ignite/internal/processors/query/calcite/sql/generated/IgniteSqlParserImpl.java4,326 symbols

modules/core/src/main/java/org/apache/ignite/internal/processors/cache/GridCacheAdapter.java381 symbols

modules/core/src/test/java/org/apache/ignite/internal/binary/BinaryMarshallerSelfTest.java309 symbols

modules/core/src/main/java/org/apache/ignite/internal/util/IgniteUtils.java306 symbols

modules/core/src/main/java/org/apache/ignite/internal/processors/cache/persistence/tree/BPlusTree.java265 symbols

modules/core/src/test/java/org/apache/ignite/internal/processors/cache/GridCacheAbstractFullApiSelfTest.java259 symbols

modules/core/src/test/java/org/apache/ignite/internal/processors/cache/IgniteCacheConfigVariationsFullApiTest.java233 symbols

modules/core/src/main/java/org/apache/ignite/configuration/IgniteConfiguration.java224 symbols

modules/core/src/test/java/org/apache/ignite/testframework/junits/multijvm/IgniteCacheProcessProxy.java220 symbols

modules/core/src/main/java/org/apache/ignite/internal/processors/cache/GridCacheProcessor.java206 symbols

modules/core/src/main/java/org/apache/ignite/spi/discovery/tcp/ServerImpl.java202 symbols

modules/core/src/main/java/org/apache/ignite/internal/util/nio/GridNioServer.java186 symbols

Datastores touched

(mysql)Database · 1 repos

pgbenchmarkDatabase · 1 repos

postgresDatabase · 1 repos

For agents

$ claude mcp add ignite \
  -- python -m otcore.mcp_server <graph>

⬇ download graph artifact