Takeshi Yoshimura

Title

Research Scientist, Hybrid Cloud

Bio

Technical Interests

Operating system/cloud
System software for storage and AI

Publications (Google scholar)

Speeding up Model Loading with fastsafetensors
Takeshi Yoshimura, Tatsuhiro Chiba, Manish Sethi, Daniel Waddington, Swaminathan Sundararaman
IEEE International Conference on Cloud Computing (CLOUD 2025), 2025 [paper, code, slides]
The infrastructure powering IBM's Gen AI model development
Talia Gershon, et. al., 2024 https://arxiv.org/abs/2407.05467
Objcache: An Elastic Filesystem over External Persistent Storage for Container Clusters.
Takeshi Yoshimura, Tatsuhiro Chiba, Sunyanan Choochotkaew, Seetharami Seelam, Hui-fang Wen, Jonas Pfefferle
https://arxiv.org/abs/2309.01399. [code]
MicroLens: A Performance Analysis Framework for Microservices Using Hidden Metrics With BPF.
Amararu Masero Karuneiro Do, Tatsuhiro Chiba, Scott Trent, Takeshi Yoshimura, Sunyanan Choochotkaew
IEEE International Conference on Cloud Computing (CLOUD 2022), 2022
AutoDECK: Automated Declarative Performance Evaluation and Tuning Framework on Kubernetes.
Sunyanan Choochotkaew, Tatsuhiro Chiba, Scott Trent, Takeshi Yoshimura, Amararu Masero Karuneiro Do
IEEE International Conference on Cloud Computing (CLOUD 2022), 2022
Investigating Genome Analysis Pipeline Performance on GATK with Cloud Object Storage.
Tatsuhiro Chiba, Takeshi Yoshimura
IEEE International Symposium on the Modeling, Analysis, and
Simulation of Computer and Telecommunication Systems (MASCOTS 2020), 2020
ImageJockey: A Framework for Container Performance Engineering. [paper, slides]
Takeshi Yoshimura, Rina Nakazawa, Tatsuhiro Chiba
IEEE International Conference on Cloud Computing (CLOUD 2020), 2020
EvFS: User-level, Event-Driven File System for Non-Volatile Memory. [paper, slides]
Takeshi Yoshimura, Tatsuhiro Chiba, Hiroshi Horii
11th USENIX Workshop on Hot Topics in Storage and File Systems (HotStorage '19), 2019
Column Cache: Buffer Cache for Columnar Storage on HDFS. [paper, slides]
Takeshi Yoshimura, Tatsuhiro Chiba, Hiroshi Horii
IEEE International Conference on Big Data (BigData '18), 2018
Towards Selecting Best Combination of SQL-on-Hadoop Systems and JVMs. [paper, slides]
Tatsuhiro Chiba, Takeshi Yoshimura, Michihiro Horie, Hiroshi Horii
IEEE International Conference on Cloud Computing (CLOUD 2018), 2018

Blog posts

Genomics on Red Hat OpenShift, 2021

Open source activities (My Github page)

Linux
DPDK
SPDK
fastsafetensors (PyPi) (repository owner)
ocp-efa-operator (repository owner)
core-dump-operator (repository owner)
objcache (repository owner)

Product contribution

Spectrum LSF for IBM Cloud, 2021
Spectrum Symphony for IBM Cloud, 2021
Slurm for IBM Cloud, 2021

Education

March 2016, Doctor of Engineering, Keio University
March 2013, Master of Engineering, Keio University
March 2011, Bachelor of Engineering, Keio University

Technical presentations in Japan

LLMロード高速化ライブラリ fastsafetensors のAIアクセラレータ適用拡大に向けて
吉村剛，千葉立寛
コンピュータシステム・シンポジウム 2025 (ComSys2025) ポスター
Lies, Damned Lies and Benchmarks: An Exploration of LLM Inference Benchmarks for Long Context Workloads
Valentijn Dymphnus van de Beek, Takeshi Yoshimura
コンピュータシステム・シンポジウム 2025 (ComSys2025)
GPU Direct Storage を用いた大規模言語モデルのロード時間短縮手法
吉村剛，千葉立寛
研究報告システムソフトウェアとオペレーティング・システム（OS) 2024 (7), 1-8
Towards Compute Flexibility for Genome Analysis in the Hybrid Cloud (最優秀若手発表賞) [slides]
Takeshi Yoshimura, Tatsuhiro Chiba
研究報告システムソフトウェアとオペレーティング・システム（OS) 2021 (7), 1-9
不揮発性メモリ利用を最適化するユーザレベルファイルシステム
吉村剛，千葉立寛，堀井洋
研究報告ハイパフォーマンスコンピューティング (HPC) 2019 (7), 1-8
POWERシステムへのユーザレベルNVMeドライバの移植と性能評価
吉村剛，千葉立寛，堀井洋
研究報告システムソフトウェアとオペレーティング・システム(OS) 2018 (11), 1-8
SQL on Hadoop における実行エンジン及びJVMの適応的選択を用いたクエリの高速化に向けて
千葉立寛，吉村剛，堀江倫大，堀井洋
研究会報告システムソフトウェアとオペレーティング・システム(OS) 2017 (18), 1-18
バッファキャッシュを用いた Spark シャッフル処理の最適化に向けて
吉村剛，千葉立寛，堀井洋，小野寺民也
コンピュータシステム・シンポジウム 2016 (ComSys2016)