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vivo Internet Technology
vivo Internet Technology
Oct 30, 2024 · Operations

Troubleshooting TiKV Disk Space Issues: Causes, Diagnosis, and Solutions

This guide explains how to diagnose and fix TiKV disk‑space problems by identifying oversized log files, redundant space‑placeholder files, and excessive RocksDB/Titan data, offering command‑line checks, configuration tweaks such as enabling log rotation, disabling reserve space, and tuning GC and Titan discardable‑ratio to restore balanced storage.

ConfigurationTiKVdisk space
0 likes · 16 min read
Troubleshooting TiKV Disk Space Issues: Causes, Diagnosis, and Solutions
DataFunSummit
DataFunSummit
Nov 2, 2023 · Databases

Understanding TiKV: Features, Architecture, and Large‑Scale Operational Challenges

This article introduces the distributed transactional KV store TiKV, explains its role as TiDB’s storage engine, details its multi‑layered architecture and Raft‑based consistency model, and discusses the performance and resource challenges encountered at massive data scales along with the engineering solutions implemented to address them.

Performance OptimizationRaftTiKV
0 likes · 14 min read
Understanding TiKV: Features, Architecture, and Large‑Scale Operational Challenges
vivo Internet Technology
vivo Internet Technology
May 10, 2023 · Databases

Design and Optimization of a Disk‑Based KV Store Compatible with Redis on TiKV

The article details a Redis‑compatible, disk‑based KV service built atop TiKV using a compute‑storage split (Tula), describes custom key encoding and expiration mechanisms, and explains four optimization stages that introduce slot‑based hashing and adaptive concurrency to dramatically cut garbage‑collection latency while preserving write performance.

Database OptimizationGarbage CollectionKV Store
0 likes · 21 min read
Design and Optimization of a Disk‑Based KV Store Compatible with Redis on TiKV
Ctrip Technology
Ctrip Technology
Aug 4, 2022 · Cloud Native

Case Study of Using JuiceFS for Cold Data Storage at Ctrip: Architecture, Performance Evaluation, and Optimization

This article presents Ctrip's experience migrating over 2 PB of cold data to JuiceFS, detailing the system's architecture, metadata engine selection, extensive performance testing, fault‑tolerance analysis, and operational optimizations that reduced storage and maintenance costs while supporting future petabyte‑scale workloads.

Cold Data StorageDistributed File SystemJuiceFS
0 likes · 15 min read
Case Study of Using JuiceFS for Cold Data Storage at Ctrip: Architecture, Performance Evaluation, and Optimization
Xiaolei Talks DB
Xiaolei Talks DB
Apr 16, 2022 · Databases

Why TiKV Scale‑In Stuck After Expansion? Diagnosis and Fix

This guide explains why a TiKV node remains pending offline after a scale‑out and scale‑in operation, walks through detailed log inspection, region checks, and command‑line troubleshooting, and provides a step‑by‑step solution to forcefully remove the problematic region and clean up the store.

ClusterTiDBTiKV
0 likes · 13 min read
Why TiKV Scale‑In Stuck After Expansion? Diagnosis and Fix
Xiaolei Talks DB
Xiaolei Talks DB
Mar 26, 2022 · Databases

Why TiDB’s GC Stalled and How to Fix Disk Space Alarms

This article walks through a real‑world TiDB/TiKV disk‑space alarm case, diagnosing why the GC worker got stuck, how TiCDC’s lingering changefeed caused outdated MVCC versions, and the step‑by‑step commands and monitoring tricks used to restore normal GC and reclaim storage.

TiCDCTiDBTiKV
0 likes · 15 min read
Why TiDB’s GC Stalled and How to Fix Disk Space Alarms
Xiaolei Talks DB
Xiaolei Talks DB
Mar 16, 2022 · Operations

How to Recover a TiKV Cluster After Multiple Node Failures

This article demonstrates how to simulate and recover TiKV cluster failures by shutting down one, two, or three nodes, explains the impact on Raft groups and region availability, and provides step‑by‑step commands for disabling PD scheduling, using tikv‑ctl, and restoring data integrity.

Cluster RecoveryData lossPD
0 likes · 28 min read
How to Recover a TiKV Cluster After Multiple Node Failures
DataFunSummit
DataFunSummit
Feb 20, 2022 · Databases

Understanding TiDB Architecture and Real‑Time Application Scenarios

This article explains TiDB's HTAP architecture, covering industry challenges, the row‑store TiKV and column‑store TiFlash design, MPP integration in TiDB 5.0, and a range of real‑time use cases such as dashboards, reporting, and data‑warehouse pipelines.

Database ArchitectureHTAPMPP
0 likes · 16 min read
Understanding TiDB Architecture and Real‑Time Application Scenarios
Programmer DD
Programmer DD
Oct 17, 2021 · Databases

TiDB Architecture Explained: TiKV, PD, and Raft in Distributed Databases

TiDB is a distributed, MySQL-compatible database built from three core components—TiDB Server for stateless SQL processing, PD for global scheduling and metadata management, and TiKV for high‑performance key‑value storage—coordinated via the Raft consensus algorithm to ensure strong consistency and fault tolerance.

Database ArchitecturePDRaft
0 likes · 13 min read
TiDB Architecture Explained: TiKV, PD, and Raft in Distributed Databases
vivo Internet Technology
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
0 likes · 20 min read
Percolator Distributed Transaction Architecture and Its Implementation in TiKV
Trip Tech Team
Trip Tech Team
Aug 12, 2021 · Databases

Unlocking HTAP: Inside TiDB, TiKV, RocksDB, and LevelDB Architecture

This article introduces TiDB’s hybrid transactional‑analytical processing capabilities, explains TiKV’s region‑based storage built on RocksDB, and provides a detailed overview of RocksDB and LevelDB architectures, including their data structures, write‑read flows, and key optimizations for modern distributed database systems.

HTAPKV storageLevelDB
0 likes · 16 min read
Unlocking HTAP: Inside TiDB, TiKV, RocksDB, and LevelDB Architecture
Architect
Architect
Sep 24, 2020 · Databases

Overview of TiDB Architecture: TiKV, PD, TiDB Server, and TiSpark

This article provides a comprehensive overview of TiDB's architecture, detailing the roles of TiKV Server, Placement Driver (PD), TiDB Server, and the TiSpark component, and explains how Raft ensures data consistency across the distributed database system.

Placement DriverRaftTiDB
0 likes · 11 min read
Overview of TiDB Architecture: TiKV, PD, TiDB Server, and TiSpark
dbaplus Community
dbaplus Community
May 20, 2016 · Databases

Inside TiKV: MVCC Mechanics and Distributed Transaction Design

This article explains how TiKV implements multi-version concurrency control (MVCC) on top of RocksDB and details its two‑phase commit transaction model, including Prewrite and Commit phases, Percolator‑style optimizations, lock handling, conflict resolution, and garbage‑collection strategies.

Distributed TransactionsGarbage CollectionMVCC
0 likes · 14 min read
Inside TiKV: MVCC Mechanics and Distributed Transaction Design