Slow Re-Router: Mitigating Tail-latency via Inter-device Coordination

Slow Re-Router: Mitigating Tail-latency via Inter-device Coordination | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Article Slow Re-Router: Mitigating Tail-latency via Inter-device Coordination Linxiao Bai This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7221978/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract Tail latency is a widely-used performance metric in storage stack as an important indicator for the quality of service. Especially with the devices becoming increasingly faster, high tail latency does not only become more pronounced in presence, but also cause greater influences.Existing tools have shown only limited effectiveness, often failing to address the problem across a broad range of storage systems. In this paper, we propose a prediction-based IO rerouting framework, named Slow Re-router to alleviate latency spikes with inter-device cooperation. This proactive approach effectively mitigates latency under heavy workloads, achieving up to a 12x improvement over state-of-the-art optimization techniques. Furthermore, the Slow Re-router framework is adaptable to a variety of scenarios, including both redundant and non-redundant storage configurations, and is compatible with both SSD and HDD. Physical sciences/Engineering Physical sciences/Mathematics and computing Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-7221978","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":511310178,"identity":"4fa5607f-be01-4043-be3c-ea679130ae7a","order_by":0,"name":"Linxiao Bai","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAA30lEQVRIiWNgGAWjYBACPmYgkQDEBuwNDAw8IKEDBLSwwbXwAJXyJBCjBcYwkEggVgs77zGJBzU2DOaSb49JvP3BIMd3I4HxcwFeh/ElGyQcS2OwnJ2XJjkngcFY8kYCs/QMvFp4DB8ksB1mMLidYyYNdFjihhsJQEH8WgwOJPwDarl5Bqylnhgthg8S24BabvCAtSQYEKHF2CCxD+iXnhxjyzlpEoYzzzxslsanhZ//jJnkj2/AEGM/Y3jjjY2NPN/x5IOf8WmBgfoGCC0BxIwNRGgYBaNgFIyCUYAPAABAoj+mfQq0sAAAAABJRU5ErkJggg==","orcid":"","institution":"National University of Defense Technology","correspondingAuthor":true,"prefix":"","firstName":"Linxiao","middleName":"","lastName":"Bai","suffix":""}],"badges":[],"createdAt":"2025-07-26 15:08:10","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-7221978/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-7221978/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":104891127,"identity":"98950b54-a0f8-4e89-8f11-a012e90b8824","added_by":"auto","created_at":"2026-03-18 10:42:55","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":390125,"visible":true,"origin":"","legend":"","description":"","filename":"SRSubmissions.pdf","url":"https://assets-eu.researchsquare.com/files/rs-7221978/v1_covered_96f123bf-5748-446b-9978-6db2a264c442.pdf"}],"financialInterests":"No competing interests reported.","formattedTitle":"Slow Re-Router: Mitigating Tail-latency via Inter-device Coordination","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":true,"highlight":"","institution":"","isAcceptedByJournal":false,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true},"keywords":"","lastPublishedDoi":"10.21203/rs.3.rs-7221978/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-7221978/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"Tail latency is a widely-used performance metric in storage stack as an important indicator for the quality of service. 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