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Lakehouse Research Base
Lakehouse Research Base
Aug 27, 2025 · Databases

Elasticsearch Cluster Core Principles & Optimization Guide

This guide explains Elasticsearch cluster architecture, write and read workflows, bulk and async ingestion, data streams, high availability via shard allocation awareness and cross-cluster replication, data skew detection and remediation, and performance tuning for writes, reads, and cluster configuration.

Bulk APIData StreamsElasticsearch
0 likes · 9 min read
Elasticsearch Cluster Core Principles & Optimization Guide
Tencent Cloud Developer
Tencent Cloud Developer
Dec 10, 2020 · Databases

Understanding LevelDB Architecture, Read/Write Flow, and Compaction Process

LevelDB stores data using an in‑memory Memtable that flushes to immutable tables and disk‑based SSTables, writes are logged then batched and applied through a writer queue, reads check Memtable, immutable Memtable, then SSTables, and background compactions merge tables to improve read performance and reclaim space.

Database InternalsLSM TreeLevelDB
0 likes · 16 min read
Understanding LevelDB Architecture, Read/Write Flow, and Compaction Process