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#elasticsearch

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7 articles

The CDC Playbook: Real-time Syncing between PostgreSQL and Elasticsearch

The CDC Playbook: Zero-Delay Data Syncing How do you keep your search engine (Elasticsearch) updated when a user changes their profile in your primary database (PostgreSQL)? Dual-writing in your application code is a rec…

Apr 20, 20261 min read

PlaybookDistributed Systems Mastery

#cdc#debezium#postgresql

System DesignAdvanced

System Design: Designing a Distributed Logging System (TB/Day Scale)

System Design: Designing a Distributed Logging System In a microservices architecture with thousands of containers, logs are scattered everywhere. You need a centralized system that can ingest terabytes of log data every…

Apr 20, 20263 min read

Deep Dive

#system-design#logging#elk-stack

System DesignAdvanced

System Design: Designing a Distributed Search Engine (Elasticsearch)

System Design: Designing a Distributed Search Engine Search is the most common way humans interact with massive datasets. Building a system that can perform full-text search across billions of documents with millisecond…

Apr 20, 20263 min read

Deep Dive

#system-design#search-engine#elasticsearch

System DesignAdvanced

System Design: Building a Search Indexing Platform

Search gets demoed as a search box. Search gets operated as a distributed data synchronization problem. The hard part is usually not querying Elasticsearch or OpenSearch. The hard part is getting the right data into the…

Apr 10, 202611 min read

Deep Dive

#system design#search#elasticsearch

AI/MLAdvanced

Retrieval Systems for RAG: BM25, Dense Retrieval, Hybrid Search, and Reranking

Retrieval is the component that determines whether your RAG system produces accurate answers or confident hallucinations. The LLM is constrained by what you hand it. If the retrieved chunks are wrong, the generation is w…

Apr 8, 202616 min read

Deep DiveAI/ML Mastery

#retrieval#bm25#rag

DatabasesAdvanced

Elasticsearch Query Optimization: From Slow to Sub-100ms

Elasticsearch is a distributed search and analytics engine built on top of Apache Lucene. At small scale, it's fast regardless of what you do. At production scale — billions of documents, hundreds of concurrent queries,…

May 29, 20258 min read

Deep Dive

#elasticsearch#search#performance

DatabasesAdvanced

Elasticsearch Deep Dive: Inverted Index, Mappings, and Query DSL

Most engineers use Elasticsearch as a black box: index some JSON, run a search, get results. When search quality is poor or performance degrades at scale, they reach for random settings without understanding why. This ar…

Feb 24, 202511 min read

Deep Dive

#elasticsearch#search#inverted index