bootjp

Creations

Main Self-Made Products

• create-raft-redis — Code for “Building a Raft-based Redis-compatible KVS in Go”
• go-kvlib — Library for Raft-compatible KVS created for the above material
• dcache — Asynchronous distributed cache using CoreDNS plugin
• disable_twitter_shortcut — Extension to disable keyboard shortcuts on Twitter Web
• elastickv — An experimental project aimed at developing a distributed key-value store for cloud environments, similar to DynamoDB
• echo_middleware_path_auth — Path-based authentication middleware for Echo
• jenkins_consecutive_fail_detector — Monitoring tool to notify only consecutive failures of Jenkins jobs
• adaptsize-go — Go implementation of size-aware admission policy (based on AdaptSize paper)
• For other projects, please visit my GitHub Profile.

Books (Technical Doujinshi)

• Learning by Building: Raft-based Redis-compatible KVS in Go — TechBookFest 16. A hands-on book focused on building a strongly consistent KVS using the Raft consensus algorithm with Redis as a subject. Beyond implementation, it explores the fundamental necessity of Raft in distributed systems, drawing on real-world failure cases like AWS to explain the design philosophy of resilient systems. Build a distributed KVS from scratch to gain a practical understanding of distributed consensus.

Others (Services / Non-GitHub)

• resize.gg — Image resize SaaS for VRChat
• VRChat Auto Rejoin Tool — Auto rejoin when returned to home
• VRChat Fixed Instance ID Launch Browser Extension
• VRChat One-Click URL Send Tool
• Discord Bot VRC Event Notification (Ended)
• VirtualCast Schedule Table (Ended Service)
• Smoocy — SNS specialized for handwritten communication (Service Ended)

Publications

International Peer-Reviewed Conference Papers

• Yoshiaki Ueda, (Title TBD: Performance Optimization for LSM Trees)
  • In preparation

Domestic Non-Peer-Reviewed Papers

• Yoshiaki Ueda, Toshinobu Usui, Construction of a Low-Latency Distributed KVS for Personalized Content Delivery
  • Proceedings of the 82nd National Convention of IPSJ, 2020-02-20, pp. 87-88
  • PDF / Bibliographic Info
• Yoshiaki Ueda, Proposal for Improving DNS Cache Hit Rate and Response Speed for Distributed Systems
  • Proceedings of the 84th National Convention of IPSJ, 2022-03-05, Preprint, Student Encouragement Award

Technical Books (Doujinshi)

• Learning by Building: Raft-based Redis-compatible KVS in Go
  • TechBookFest 16 (Technical Doujinshi / 79 pages, ver 1.2)
  • Goal
    • An introductory hands-on book that teaches distributed systems, consistency models, and Raft by implementing a Redis-compatible KVS.
  • Structure
    • The first half covers distributed systems fundamentals, Redis/Redis Cluster strengths and limitations, consistency models, and Raft core concepts (leader election, log replication, safety).
    • The second half connects theory to implementation through a full Redis-compatible KVS build.
  • Hands-on implementation (Go)
    • Uses hashicorp/raft, implementing the datastore, Snapshot, and StateMachine (Apply/Snapshot/Restore).
    • Implements RESP with redcon and supports GET/SET/DEL.
    • Handles follower-side requests via MOVED redirection to the leader, validated in a 3-node setup.
  • Production context
    • Links the design choices to real strong-consistency/high-availability use cases, including PayPay’s TiDB adoption.
  • TechBookFest Product Page / BOOTH

Presentations

• The Mechanism Behind NewSQL and Distributed Databases: Raft

  • DB Tech Showcase 2025 (2025-07)
  • Explained the internal structure of the Raft algorithm and its application in NewSQL (CockroachDB/TiDB, etc.) from an application engineer’s perspective at one of Japan’s largest database conferences.
    • Related paper: In Search of an Understandable Consensus Algorithm (Extended Version)

• Designing an Event Bus for Loosely Coupled Schema-Driven Development

  • Platform Engineering Kaigi 2025 / Session Page
  • Presented a case study of migrating from monolith to microservices at hacomono. Covered dependency elimination using the Fire-and-Forget pattern, schema management with Protocol Buffers, and governance via compatibility checks in CI.

• What is Raft? Understanding its Strengths and Weaknesses from the Mechanism

  • Visually explained the behavior of the distributed consensus algorithm Raft (leader election, log replication) and the trade-offs between consistency and availability (3,600+ views).
    • Related paper: In Search of an Understandable Consensus Algorithm (Extended Version)

• Why Did Spanner Need an Atomic Clock?

  • Explanation of the physical and logical necessity of the TrueTime API and atomic clocks supporting Google Spanner’s External Consistency.
    • Related paper: Spanner: Google’s Globally-Distributed Database

• Reading the Paper on AWS’s Durable Redis-Compatible KVS: MemoryDB

  • Explanation of the persistence log mechanism of in-memory DBs and architectures for achieving high availability.
    • Original paper: Amazon MemoryDB: A fast and durable memory-first cloud database

• Building a Low-Latency Distributed KVS for Personalized Content Delivery (VRChat Ver)

  • Explanation of optimization approaches for personalized content delivery.
    • Related explanation of my own paper: Construction of a Low-Latency Distributed KVS for Personalized Content Delivery

• Understanding Challenges and Insights Moving from Aurora Serverless to v2 from the Paper

  • Explains Aurora Serverless scaling issues and the improvements that led to Aurora Serverless v2.
    • Original paper: Resource management in Aurora Serverless

• Reading the Paper on AdaptSize Supporting Akamai’s Cache Efficiency

  • Explanation of the theory and practice of the AdaptSize algorithm for optimizing CDN cache efficiency.
    • Original paper: AdaptSize: Orchestrating the Hot Object Memory Cache in a Content Delivery Network