Open source distributed search and analytics engine for scalable data storage. Supports structured, unstructured, geo, metric searches and piped queries. Features AI-powered Relevance Engine for semantic search and LLM integration. Provides instant results through inverted indices and BKD trees
TLA+ is a formal specification language developed by Leslie Lamport. Used for designing, modeling, documenting, and verifying concurrent systems. Specifications written in formal logic and mathematics for precise verification. Uses basic set theory for safety and temporal logic for liveness
HDFS is a distributed file system designed for commodity hardware. System consists of single NameNode managing namespace and DataNodes for storage. Files are split into blocks of configurable size for fault tolerance. Write-once-read-many access model enables high throughput data access
DCE was created by OSF in early 1990s as a framework for client/server applications. System was based on independent developments from various OSF partners. First vendor product released in 1992, with major vendors implementing by 1995
OMG standard for real-time data exchange using publish-subscribe pattern. Enables dependable, high-performance, scalable data exchanges. Supports multiple platforms and applications simultaneously. Handles message addressing, delivery, and flow control
Node is either redistribution point or communication endpoint in telecommunications networks. Physical nodes can be data communication equipment (modems, hubs, switches) or data terminal equipment (computers). Every LAN/WAN node on data link layer must have network address. Some data-link-layer devices like switches don't need IP addresses