Sep 13, 2024 · Backend Development

How Didi Scales Online Search with Elasticsearch: Architecture, Performance, and Stability

The article details Didi's comprehensive use of Elasticsearch across all online retrieval scenarios, covering its physical‑machine architecture, gateway and control layers, data synchronization methods, cross‑datacenter replication, JDK17 + ZGC performance upgrades, cost‑saving ZSTD compression, multi‑tenant isolation, custom security, and ongoing stability practices leading to a planned upgrade to Elasticsearch 8.13.

Cross‑Datacenter ReplicationDidiElasticsearch

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How Didi Scales Online Search with Elasticsearch: Architecture, Performance, and Stability

Didi Tech

Aug 7, 2023 · Backend Development

How Didi Achieved Cross‑Datacenter Elasticsearch Replication for Strong Consistency

This article explains Didi's self‑developed DCDR system that replicates Elasticsearch indices across data‑center clusters, detailing its design goals, core mechanisms, chain construction, historical data recovery, real‑time sync, and data‑quality validation to ensure high availability and strong consistency.

Cross‑Datacenter ReplicationDCDRData Consistency

0 likes · 15 min read

How Didi Achieved Cross‑Datacenter Elasticsearch Replication for Strong Consistency