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

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
• Yoshiaki Ueda, (Title TBD: Research on Data Tiering in KVS)
  • In preparation

Technical Books (Doujinshi)

• Learning by Building: Raft-based Redis-compatible KVS in Go
  • TechBookFest 16
  • A hands-on guide to building a Redis-compatible KVS replicated with Raft consensus from scratch in Go. Covers RESP parsing, log replication using Raft libraries, and real-world use cases requiring strong consistency/availability (e.g., TiDB at PayPay).
  • 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.

• 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).

• 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.

• 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.

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

  • Design and implementation of a low-latency data delivery infrastructure in real-time environments like VRChat.

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

  • Explanation of database scaling mechanisms and technical challenges in the evolution to v2 based on the paper.

• 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.