Repository Index

Official repository of Trino, the distributed SQL query engine for big data, formerly known as PrestoSQL (https://trino.io)

• java
• presto
• hive
• hadoop

Apache ZooKeeper

• zookeeper
• database
• hacktoberfest
• java

An AI-powered next-generation open source real-time observability system.

• monitor
• monitoring
• prometheus
• self-hosted

Hazelcast is a unified real-time data platform combining stream processing with a fast data store, allowing customers to act instantly on data-in-motion for real-time insights.

• java
• hazelcast
• in-memory
• big-data

Automated testing to find logic and performance bugs in database systems

• testing
• sql
• dbms
• fuzzing

SirixDB is an an embeddable, bitemporal, append-only database system and event store, storing immutable lightweight snapshots. It keeps the full history of each resource. Every commit stores a space-efficient snapshot through structural sharing. It is log-structured and never overwrites data. SirixDB uses a novel page-level versioning approach.

• xquery
• java
• temporal-data
• storage

The legacy distributed object storage server developed by PitchPoint Solutions can store billions of large and small files using minimal resources. Object data is stored in replicated volumes implemented like Facebooks Haystack Object Store. Object metadata which essentially maps an object name to a volume position is stored in an elasticsearch index. (Development by PitchPoint Solutions has been discontinued)

• distributed-storage
• distributed-systems
• vertx
• rxjava

Persistence for REST resources in the filesystem or a redis database

A highly scalable redis-persistent queuing system for vertx

Stateful actors on Apache Flink 2.x and Java 21 — durable per-key state, exactly-once messaging, Kafka and Kinesis I/O, Kubernetes-native deployment. Continues the Apache Stateful Functions programming model on the modern Flink line.

• actor-model
• apache-flink
• distributed-systems
• event-driven