]> 2026-09-08T17:12:37+09:00 Lesson:bypassd enabling fast userspace access to shared ssds da9e5d79 3000 ko Shared NVMe SSDs serving unmodified storage applications. Limits: Depends on suitable IOMMU/device support and a setup/control path in the OS. BypassD exposes virtual-address access and uses the IOMMU to translate file offsets to LBAs on a shared SSD. S3ResearchAgent low Venue: ASPLOS. Year: 2024. Kernel I/O is safe/shareable but slow; kernel-bypass frameworks require exclusive devices or application rewrites. Verification: official DOI/ASPLOS abstract and arXiv paper; confidence=high. 2026-07-16T15:06:10Z 2461238.1292824 BypassD: Enabling Fast Userspace Access to Shared SSDs. ASPLOS 2024. The IOMMU can enforce storage address translation/protection for a shared userspace fast path. BypassD: Enabling Fast Userspace Access to Shared SSDs workloads=4 KB I/O microbenchmarks and WiredTiger; baselines=Linux and SPDK; metrics=latency and application performance; results=42% lower 4 KB latency vs Linux; near SPDK; about 20% WiredTiger improvement Can unmodified applications access a shared SSD from userspace at near-SPDK latency while retaining protection and files? lab Move per-I/O translation into hardware while retaining kernel control-plane setup. Draft 2026-07-18T14:58:21Z 2461240.1238542 2026-07-18T14:58:21Z 2461240.1238542 bypassd enabling fast userspace access to shared ssds da9e5d79 3000 ev_e194bc4d2dcb4bac 2026-07-16T15:06:11Z 2461238.129294 S3ResearchAgent BypassD: Enabling Fast Userspace Access to Shared SSDs. ASPLOS 2024. paper Bibliographic paper record. not_recorded bypassd enabling fast userspace access to shared ssds da9e5d79# ce0a7b615cfcb07dae982fae91c29c05 3000 verified-content-v1-0152 2026-07-16T18:58:41Z 2461238.2907523 S3ResearchAgent Sujay Yadalam; Chloe Alverti; Vasileios Karakostas; Jayneel Gandhi; Michael Swift. BypassD: Enabling Fast Userspace Access to Shared SSDs. ASPLOS, 2024. paper Verification: official DOI/ASPLOS abstract and arXiv paper; confidence=high. Canonical title: BypassD: Enabling Fast Userspace Access to Shared SSDs Question: Can unmodified applications access a shared SSD from userspace at near-SPDK latency while retaining protection and files? Context: Kernel I/O is safe/shareable but slow; kernel-bypass frameworks require exclusive devices or application rewrites. Method: BypassD exposes virtual-address access and uses the IOMMU to translate file offsets to LBAs on a shared SSD. Evaluation: workloads=4 KB I/O microbenchmarks and WiredTiger; baselines=Linux and SPDK; metrics=latency and application performance; results=42% lower 4 KB latency vs Linux; near SPDK; about 20% WiredTiger improvement Interpretation: The IOMMU can enforce storage address translation/protection for a shared userspace fast path. Reusable lesson: Move per-I/O translation into hardware while retaining kernel control-plane setup. Applicability: Shared NVMe SSDs serving unmodified storage applications. Limits: Depends on suitable IOMMU/device support and a setup/control path in the OS. not_recorded bypassd enabling fast userspace access to shared ssds da9e5d79# 7f99b1ad70bd6a2726fbefb91c885013 3000 canonical-paper-v2-da9e5d79 2026-07-18T05:13:50Z 2461239.7179398 S3ResearchAgent Sujay Yadalam; Chloe Alverti; Vasileios Karakostas; Jayneel Gandhi; Michael Swift. BypassD: Enabling Fast Userspace Access to Shared SSDs. ASPLOS, 2024. paper Verification: official DOI/ASPLOS abstract and arXiv paper; confidence=high. Canonical title: BypassD: Enabling Fast Userspace Access to Shared SSDs Question: Can unmodified applications access a shared SSD from userspace at near-SPDK latency while retaining protection and files? Context: Kernel I/O is safe/shareable but slow; kernel-bypass frameworks require exclusive devices or application rewrites. Method: BypassD exposes virtual-address access and uses the IOMMU to translate file offsets to LBAs on a shared SSD. Evaluation: workloads=4 KB I/O microbenchmarks and WiredTiger; baselines=Linux and SPDK; metrics=latency and application performance; results=42% lower 4 KB latency vs Linux; near SPDK; about 20% WiredTiger improvement Interpretation: The IOMMU can enforce storage address translation/protection for a shared userspace fast path. Reusable lesson: Move per-I/O translation into hardware while retaining kernel control-plane setup. Applicability: Shared NVMe SSDs serving unmodified storage applications. Limits: Depends on suitable IOMMU/device support and a setup/control path in the OS. full_text bypassd enabling fast userspace access to shared ssds da9e5d79# 2a94a9896df9f3c231fefab27e35b9db 3000 2026-07-18T14:58:20Z 2461240.1238426 S3ResearchAgent verify_8aed0faea058218573b0 metadata_only context 보존 객체는 cookie/landing page이므로 서지 위치만 확인했고 본문 주장을 검증하지 못함. inconclusive 2d4af2180213f41fae906d38d1ef2fac38c7f20c3d7510af7c8581758703f28f R2-RESTIC:7f893ca5afd2cfb6fe320e9b61063ccc70e75a7a96589420038c8cf338b273be; archive-manifest-sha256=e28171fb69e141ce306d92dfe4b10e6cdc6e81d4fa910c30a846204dbcf8edf8; sha256=2d4af2180213f41fae906d38d1ef2fac38c7f20c3d7510af7c8581758703f28f 보존 파일 objects/sha256/2d/2d4af2180213f41fae906d38d1ef2fac38c7f20c3d7510af7c8581758703f28f ev_e194bc4d2dcb4bac a2137dfdbd59f69ce9674ae3413406becd301b8115cdb85cd2855e65b79cee8f bypassd enabling fast userspace access to shared ssds da9e5d79# 2efddf77219addef83a4d1f84802b0e9 3000 2026-07-18T14:58:20Z 2461240.1238426 S3ResearchAgent verify_9c964098af78f68af45a metadata_only context 보존 객체는 cookie/landing page이므로 서지 위치만 확인했고 본문 주장을 검증하지 못함. inconclusive 2d4af2180213f41fae906d38d1ef2fac38c7f20c3d7510af7c8581758703f28f R2-RESTIC:7f893ca5afd2cfb6fe320e9b61063ccc70e75a7a96589420038c8cf338b273be; archive-manifest-sha256=e28171fb69e141ce306d92dfe4b10e6cdc6e81d4fa910c30a846204dbcf8edf8; sha256=2d4af2180213f41fae906d38d1ef2fac38c7f20c3d7510af7c8581758703f28f 보존 파일 objects/sha256/2d/2d4af2180213f41fae906d38d1ef2fac38c7f20c3d7510af7c8581758703f28f verified-content-v1-0152 491723e60ed164b711d75aa3b0b665116161c20e7581eae1b0cccc195534fa20 bypassd enabling fast userspace access to shared ssds da9e5d79# 5f467e72d261f472bd38354d94a2063d 3000 2026-07-18T14:58:20Z 2461240.1238426 S3ResearchAgent verify_53278c6fb5000b9edff1 metadata_only context 보존 객체는 cookie/landing page이므로 서지 위치만 확인했고 본문 주장을 검증하지 못함. inconclusive 2d4af2180213f41fae906d38d1ef2fac38c7f20c3d7510af7c8581758703f28f R2-RESTIC:7f893ca5afd2cfb6fe320e9b61063ccc70e75a7a96589420038c8cf338b273be; archive-manifest-sha256=e28171fb69e141ce306d92dfe4b10e6cdc6e81d4fa910c30a846204dbcf8edf8; sha256=2d4af2180213f41fae906d38d1ef2fac38c7f20c3d7510af7c8581758703f28f 보존 파일 objects/sha256/2d/2d4af2180213f41fae906d38d1ef2fac38c7f20c3d7510af7c8581758703f28f canonical-paper-v2-da9e5d79 03ac911f439980724eacd42e441999ce53391d6b6472f787993e3e65030d5cf8 bypassd enabling fast userspace access to shared ssds da9e5d79# e3497d6306651a2ab72e139efa7cf8fc 3000 2026-07-18T14:58:20Z 2461240.1238426 S3ResearchAgent verify_92c78d660943a064cba3 metadata_only observation,interpretation,reusable_lesson claim-bearing O/I/R coverage was not established; confidence forced to low inconclusive 2d4af2180213f41fae906d38d1ef2fac38c7f20c3d7510af7c8581758703f28f R2-RESTIC:7f893ca5afd2cfb6fe320e9b61063ccc70e75a7a96589420038c8cf338b273be; archive-manifest-sha256=e28171fb69e141ce306d92dfe4b10e6cdc6e81d4fa910c30a846204dbcf8edf8; sha256=2d4af2180213f41fae906d38d1ef2fac38c7f20c3d7510af7c8581758703f28f; high-confidence adjudication ledger Saved HTML inspected in full; it is a cookie/landing/generic metadata page and contains no claim-bearing text covering O/I/R. canonical-paper-v2-da9e5d79 03ac911f439980724eacd42e441999ce53391d6b6472f787993e3e65030d5cf8 bypassd enabling fast userspace access to shared ssds da9e5d79# 6cee6685498903bec70477543a37a71f