Articles (3) Patents (1)
Data Infrastructure and Services in Engineering

eBay’s Global Secondary Indexes

How eBay enabled a real-time, distributed and performant index service for its NuData platform, a large-scale, in-house database platform

By: Jung-Sang Ahn and Dongho Kim
Distributed Transactions in Engineering

GRIT: a Protocol for Distributed Transactions across Microservices

eBay technologists recently showed off a distributed transaction protocol called GRIT, for distributed ACID (atomicity, consistency, isolation, durability) transactions across microservices with multiple underlying databases.

By: Gene Zhang, Mohammad Roohitavaf, Jung-Sang Ahn and Kun Ren
Distributed Systems in Engineering

NuRaft: a Lightweight C++ Raft Core

We are excited to announce the public release of NuRaft, a lightweight C++ Raft core, under the Apache 2.0 open source license. NuRaft is based on the cornerstone C++ Raft implementation, but with various additions and changes, and is the result of over two years of development and testing for production use within eBay for storage server data replication. This post discusses what NuRaft is, and how it can be used.

By: Gene Zhang and Jung-Sang Ahn

Abstract:

A replicated key-value store is implemented using a ?last-write-wins? consensus protocol. To improve throughput and latency in cross-data-center configurations, a system deploys a cross-cluster, learner-only member to a cluster of nodes (e.g., a data center). The cross-cluster, learner-only member submits key-values received at local leader members to remote clusters. Conflicts between the key-values and initial values at the remote clusters are resolved using a ?last-write-wins? consensus protocol.

Country: United States
Grant Date: November 17, 2020
INVENTORS: Jung-Sang Ahn, Sami Ben Romdhane, Guogen Zhang
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Jung-Sang Ahn