Author

Didi Tech

Official Didi technology account

302

Articles

Likes

1.6k

Views

Comments

Latest from Didi Tech

100 recent articles max

Didi Tech

Aug 10, 2023 · Information Security

Security Hardening and Architecture of Didi's Elasticsearch Deployment

Didi hardened its massive Elasticsearch deployment—spanning 66 clusters and thousands of nodes—by adding a custom security plugin that authenticates requests at the cluster level, implementing a one‑click toggle and staged rolling upgrades, ultimately enabling authentication across all clusters and dramatically reducing data‑leak risk.

AuthenticationDidiElasticSearch

0 likes · 12 min read

Security Hardening and Architecture of Didi's Elasticsearch Deployment

Didi Tech

Aug 10, 2023 · Big Data

Implementing ZSTD Compression in Didi's Elasticsearch for High‑Performance Log Ingestion

By integrating ZSTD compression into Didi’s Elasticsearch 7.6, the team cut CPU usage by about 15 %, reduced index storage roughly 30 %, boosted write throughput up to 25 %, and eliminated over 20 servers, demonstrating a faster, more storage‑efficient solution for petabyte‑scale log ingestion.

Big DataCompressionElasticSearch

0 likes · 10 min read

Implementing ZSTD Compression in Didi's Elasticsearch for High‑Performance Log Ingestion

Didi Tech

Aug 9, 2023 · Backend Development

Upgrading Didi Elasticsearch to JDK 17 with ZGC: Challenges, Solutions, and Performance Gains

Didi upgraded its self‑developed Elasticsearch from JDK 11/G1 to JDK 17, adopting ZGC for latency‑critical clusters and tuned G1 for throughput, which eliminated long GC pauses, reduced query latency by up to 96%, cut CPU usage, and dramatically improved stability across multiple production clusters.

BackendElasticSearchGC optimization

0 likes · 14 min read

Upgrading Didi Elasticsearch to JDK 17 with ZGC: Challenges, Solutions, and Performance Gains

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.

DCDRData ConsistencyDistributed Systems

0 likes · 15 min read

How Didi Achieved Cross‑Datacenter Elasticsearch Replication for Strong Consistency

Didi Tech

Aug 3, 2023 · Cloud Native

eBPF-Based Cross-Language Non-Intrusive Traffic Recording for Cloud-Native Services

The article describes an eBPF‑based, language‑agnostic traffic recording framework that hooks low‑level socket operations and thread identifiers to capture complete request‑response flows across Java, PHP, and Go services without modifying application code, dramatically lowering implementation and maintenance costs for cloud‑native traffic replay.

Cloud NativeGoSocket

0 likes · 15 min read

eBPF-Based Cross-Language Non-Intrusive Traffic Recording for Cloud-Native Services

Didi Tech

Jul 31, 2023 · Big Data

Data Serviceization at Didi: Architecture, Phases, and Standard Metric Service

Didi’s data serviceization converts raw business data into consumable services through a four‑stage pipeline—integration, development, production, and back‑flow—while the Data Dream Factory and Shu‑Chain platform automate synchronization, provide a unified access gateway for thousands of APIs, and introduce a standard metric service that abstracts storage complexities and ensures high‑performance, secure data delivery.

data integrationdata platformdata serviceization

0 likes · 16 min read

Data Serviceization at Didi: Architecture, Phases, and Standard Metric Service

Didi Tech

Jul 27, 2023 · Backend Development

Improving Service Startup Latency with a Warmup Mechanism for Dubbo Services

To eliminate the brief latency spike that occurs when new Dubbo services start, the authors introduce a @Warmup annotation and early‑startup listeners that generate mock traffic and trigger a forced GC before publishing, cutting initial response times from seconds to tens of milliseconds and improving reliability for latency‑sensitive applications.

Backend PerformanceDubboJava

0 likes · 13 min read

Improving Service Startup Latency with a Warmup Mechanism for Dubbo Services

Didi Tech

Jul 25, 2023 · Backend Development

Separating Test Traffic Trigger and Result Verification for Didi Ride‑Hailing Backend

By separating test‑traffic triggering from result verification, Didi’s ride‑hailing backend uses live‑traffic inspection and replayed offline tests with bucketed validation rules to achieve near‑zero‑cost, full‑coverage QA, catching hundreds of bugs annually and dramatically improving service reliability for drivers and passengers.

Backend testingRide Hailingquality assurance

0 likes · 18 min read

Separating Test Traffic Trigger and Result Verification for Didi Ride‑Hailing Backend

Didi Tech

Jul 18, 2023 · Backend Development

Self-Service Order Testing Architecture and Evolution for Didi Ride-Hailing Platform

Didi’s ride‑hailing order testing has progressed from manual device‑simulated orders to a tool‑based framework and now a self‑service visual platform that lets engineers drag‑and‑drop, share, and auto‑populate scenarios, dramatically cutting effort while supporting hundreds of test cases for thousands of monthly users.

Ride Hailingbackend developmentorder testing

0 likes · 10 min read

Self-Service Order Testing Architecture and Evolution for Didi Ride-Hailing Platform

Didi Tech

Jul 17, 2023 · Backend Development

Backend Architecture Evolution and Standardization of Didi Ride-Hailing Platform

Didi’s ride‑hailing backend evolved from a monolithic service to a DDD‑split architecture and the DuKang framework, then standardized components, rendering gateways, function access, and logging to solve multi‑terminal inconsistency, complex rendering logic, cross‑process integration, and data visibility, creating a unified cross‑end rendering platform supporting over twenty pages.

DidiRide Hailingbackend architecture

0 likes · 18 min read

Backend Architecture Evolution and Standardization of Didi Ride-Hailing Platform