Kuaishou Graph Database Storage‑Compute Separation Architecture and Its Application in Real‑Time Recommendation

This article presents Kuaishou's graph database storage‑compute separation architecture, detailing its application in real‑time recommendation scenarios, core requirements of cost, performance and usability, the layered service design, memory‑compact models, edge structures, snapshot isolation, and key performance optimizations such as Share‑Nothing and columnar data flow.

Storage Compute Separationgraph databasereal-time recommendation

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Kuaishou Graph Database Storage‑Compute Separation Architecture and Its Application in Real‑Time Recommendation

Tencent Tech

Sep 27, 2023 · Databases

PolySI & Tesseract: New Black‑Box Tools for Snapshot Isolation & Schema Evolution

Tencent Cloud, in collaboration with Nanjing University, ETH Zurich, and Simon Fraser University, presented two VLDB‑2023 papers introducing PolySI, a black‑box checker for snapshot isolation, and Tesseract, an online, transactional schema‑evolution technique, both demonstrating superior performance and practical impact on modern cloud databases.

VLDBblack-box testingdatabases

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PolySI & Tesseract: New Black‑Box Tools for Snapshot Isolation & Schema Evolution

JavaEdge

Aug 1, 2022 · Databases

How Snapshot Isolation and MVCC Prevent Read Skew in Modern Databases

The article explains how snapshot isolation and multi-version concurrency control (MVCC) address read skew and nonrepeatable reads in databases, detailing transaction IDs, version visibility rules, implementation differences across PostgreSQL, MySQL, Oracle, and the impact on backups, analytics, and index handling.

Database ConcurrencyMVCCread skew

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How Snapshot Isolation and MVCC Prevent Read Skew in Modern Databases

vivo Internet Technology

Sep 15, 2021 · Databases

Percolator Distributed Transaction Architecture and Its Implementation in TiKV

Percolator implements a two‑phase commit transaction protocol with a client coordinator, a timestamp oracle, and storage (Bigtable or TiKV’s RocksDB), providing snapshot‑isolated ACID semantics via lock, write, and data columns; TiKV adds parallel prewrite, short‑value storage, point‑read shortcuts, calculated commit timestamps, and single‑region one‑phase commits to boost performance while keeping the design simple and scalable, though high contention can cause retries and read‑wait delays.

PercolatorRocksDBTiKV

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Percolator Distributed Transaction Architecture and Its Implementation in TiKV

ITPUB

Aug 30, 2016 · Databases

How to Build a Distributed KV Store with Full ACID Guarantees

This talk walks through the evolution of databases, explains the challenges of building a distributed key‑value system that provides full ACID properties, and details the architectural components, sharding, migration, snapshot isolation, two‑phase commit, timestamp handling, and distributed transaction processing techniques.

ACIDDistributed SystemsNewSQL

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How to Build a Distributed KV Store with Full ACID Guarantees