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350PB, Millions of Events, One System: Inside Uber’s Cross-Region Data Lake and Disaster Recovery
Uber’s HiveSync is a sharded, cross-region batch replication system keeping Hive/HDFS data consistent across multiple regions. Handling 5M daily Hive events and 8PB of data replication, it uses event-driven jobs, hybrid RPC and DistCp strategies, DAG-based orchestration, and dynamic sharding, enabling disaster recovery, horizontal scaling, and 99.99% cross-region data accuracy.
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React Advanced 2025: Type Safe URL State Management Takes Center Stage with Nuqs
Nuqs, a cutting-edge open-source URL state manager for React, revolutionizes application development with its type-safe approach. Showcased at React Advanced 2025, it empowers developers to share complete app states via URLs, enabling "teleportation" and "time travel." Adopted by industry leaders, Nuqs simplifies state management while ensuring robust performance and type safety.
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AWS Introduces Durable Functions: Stateful Logic Directly in Lambda Code
AWS has unveiled Durable Functions for Lambda, revolutionizing multi-step workflows. This feature allows developers to write code that manages state and retry logic without incurring costs during waits. With advanced capabilities like checkpoints, pauses for up to a year, and simplified orchestration, Durable Functions streamline complex serverless applications.
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AWS Step Functions Introduces Versions and Aliases for Enhanced Deployment Resiliency
Recently, AWS announced the availability of versions and aliases in Step Functions to improve resiliency for deployments of serverless workflows.
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Uber Re-Architected Its Foundational Fulfilment Service
Uber recently shared how it re-architected its fulfilment service, one of Uber's foundational platform services. Following a two-year-long effort involving 30+ teams and hundreds of developers, Uber engineers "built a strong foundation for modelling various types of physical fulfilment categories in the new platform and migrated all existing transportation use cases."
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AWS Serverless Application Model Supports Step Functions State Machines
The AWS Serverless Application Model (AWS SAM) recently gained support for AWS Step Functions state machines. The new AWS::Serverless::StateMachine resource type enables developers to define state machines within a SAM template or in a separate file so that they can provision workflow orchestration as an integrated part of serverless applications.