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Latest from Didi Tech

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Didi Tech

Aug 29, 2023 · Operations

Offline Simulation (OSim): Building Unlimited Test Environments for Large‑Scale Services

OSim (Offline Simulation) creates unlimited, production‑like test environments for large‑scale services by using a shared benchmark and branch‑specific instances, routing traffic via colored trace IDs through a sidecar gateway and proxying Redis and MQ data, thus overcoming All‑in‑One bottlenecks and improving stability, automation, and developer productivity.

DevOpsTestingoffline environment

0 likes · 26 min read

Offline Simulation (OSim): Building Unlimited Test Environments for Large‑Scale Services

Didi Tech

Aug 22, 2023 · Fundamentals

Guidelines for Communication, Development, Testing, and Post‑Release Practices

Effective software delivery relies on clear, tool‑appropriate communication, data‑driven decision making, rigorous requirement validation, disciplined documentation, readable code with consistent naming and concise commits, fast code reviews, diverse cross‑team testing, swift incident mitigation and reflective post‑mortems, fostering sustainable growth through continual good habits.

CommunicationTestingbest practices

0 likes · 19 min read

Guidelines for Communication, Development, Testing, and Post‑Release Practices

Didi Tech

Aug 17, 2023 · Operations

Construction of a Full-Link Load Testing Simulation Measurement System for Didi Ride-Hailing

The article details how Didi’s ride‑hailing team built a full‑link load‑testing simulation‑degree measurement system that quantifies test coverage across five dimensions—interface, scenario, category, link, and module—using normalized metrics, traffic prediction, and scoring formulas to identify gaps, improve stability, and guide future capacity‑planning enhancements.

DidiLoad TestingRide Hailing

0 likes · 16 min read

Construction of a Full-Link Load Testing Simulation Measurement System for Didi Ride-Hailing

Didi Tech

Aug 15, 2023 · Frontend Development

Page Logic Orchestration with LogicFlow: Solving Low‑Code Expansion Challenges

Page Logic Orchestration with LogicFlow solves low‑code expansion challenges by replacing rigid zero‑code property panels with a visual workflow editor that lets operators compose, debug, and execute flexible page logic using custom nodes, parallel execution, and repeatable flows, reducing development cost and complexity.

EngineLogicFlowfrontend

0 likes · 13 min read

Page Logic Orchestration with LogicFlow: Solving Low‑Code Expansion Challenges

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.

CompressionElasticsearchLucene

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.

ElasticsearchGC optimizationJDK17

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.

Cross‑Datacenter ReplicationDCDRData Consistency

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.

GoSocketcloud-native

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