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<!doctype html>
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<head>
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<meta name="description" content="DataSys develops open-source systems for continuously evolving data.">
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<title>DataSys | Systems for Evolving Data</title>
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<body class="portal portal-datasys">
<header class="site-header">
<a class="brand" href="#top" aria-label="DataSys home">
<span class="brand-mark" aria-hidden="true">D</span>
<span>DataSys</span>
<small>Data layer</small>
</a>
<nav aria-label="Primary navigation">
<a href="#flagships">Flagships</a>
<a href="./achievements.html">Achievements</a>
<a href="#directory">Repository atlas</a>
<a href="#ecosystem">Ecosystem</a>
<a class="nav-action" href="https://github.com/DataSysResearch">GitHub <span aria-hidden="true">↗</span></a>
</nav>
</header>
<nav class="mobile-nav" aria-label="Mobile navigation">
<a class="active" href="#top">Overview</a>
<a href="#flagships">Flagships</a>
<a href="./achievements.html">Publications</a>
<a href="https://github.com/DataSysResearch">GitHub <span aria-hidden="true">↗</span></a>
</nav>
<main id="top">
<section class="hero" aria-labelledby="page-title">
<img class="hero-media" src="assets/ecosystem-infrastructure.png" alt="" width="1944" height="809">
<div class="hero-shade"></div>
<div class="hero-copy">
<p class="signal"><span></span> Intelligent systems ecosystem / 02</p>
<h1 id="page-title">DataSys</h1>
<p class="hero-kicker">Systems for data that never stands still.</p>
<p class="hero-summary">Streams, dynamic graphs, vector indexes, online updates, queries, lifecycle, and reproducible systems evaluation.</p>
<div class="hero-actions">
<a class="button button-primary" href="#directory">Explore repositories <span aria-hidden="true">↓</span></a>
<a class="button button-quiet" href="https://github.com/DataSysResearch">Open GitHub <span aria-hidden="true">↗</span></a>
</div>
</div>
<dl class="hero-metrics" aria-label="Organization overview">
<div><dt>19</dt><dd>maintained</dd></div>
<div><dt>06</dt><dd>baseline forks</dd></div>
<div><dt>05</dt><dd>technical pillars</dd></div>
</dl>
</section>
<section class="scope-rail" aria-label="DataSys technical scope">
<span data-code="01">Stream systems</span>
<span data-code="02">Dynamic graphs</span>
<span data-code="03">Vector + ANNS</span>
<span data-code="04">Approximate compute</span>
<span data-code="05">Benchmarks</span>
</section>
<section class="section section-dark" id="flagships">
<div class="section-head">
<div><p class="eyebrow">Flagship systems</p><h2>Four views of evolving data.</h2></div>
<p>Each flagship owns a distinct systems boundary. Supporting repositories appear in the atlas below.</p>
</div>
<div class="flagship-grid">
<a class="flagship" href="https://github.com/DataSysResearch/MorphStream">
<span class="index">01 / STREAM</span>
<div class="flagship-mark"><img src="assets/morphstream-logo.png" alt="" width="50" height="50"></div>
<h3>MorphStream</h3>
<p>Transactional stream processing with ACID semantics over continuously arriving data.</p>
<span class="open">Repository ↗</span>
</a>
<a class="flagship" href="https://github.com/DataSysResearch/CANDOR-Bench">
<span class="index">02 / VECTOR</span>
<div class="flagship-mark">CB</div>
<h3>CANDOR-Bench</h3>
<p>Continuous ANNS evaluation under dynamic, open-world data streams.</p>
<span class="open">Repository ↗</span>
</a>
<a class="flagship" href="https://github.com/DataSysResearch/GRACE">
<span class="index">03 / GRAPH</span>
<div class="flagship-mark">GR</div>
<h3>GRACE</h3>
<p>Graph processing designed around topology that changes while computation runs.</p>
<span class="open">Repository ↗</span>
</a>
<a class="flagship" href="https://github.com/DataSysResearch/Sesame">
<span class="index">04 / CLUSTER</span>
<div class="flagship-mark">SE</div>
<h3>Sesame</h3>
<p>Modular stream-clustering systems and reproducible empirical evaluation.</p>
<span class="open">Repository ↗</span>
</a>
</div>
</section>
<section class="section directory" id="directory">
<div class="section-head">
<div><p class="eyebrow">Repository atlas</p><h2>Organized by technical role.</h2></div>
<p>Filter maintained systems, evaluation infrastructure, and research resources without flattening them into one list.</p>
</div>
<div class="filterbar" role="group" aria-label="Filter repositories">
<button class="filter active" type="button" data-filter="all" aria-pressed="true">All <span>19</span></button>
<button class="filter" type="button" data-filter="stream" aria-pressed="false">Streams</button>
<button class="filter" type="button" data-filter="graph" aria-pressed="false">Graphs</button>
<button class="filter" type="button" data-filter="vector" aria-pressed="false">Vector</button>
<button class="filter" type="button" data-filter="compute" aria-pressed="false">AMM</button>
<button class="filter" type="button" data-filter="benchmark" aria-pressed="false">Benchmarks</button>
<button class="filter" type="button" data-filter="resource" aria-pressed="false">Resources</button>
</div>
<div class="repo-list" aria-live="polite">
<a class="repo-row" data-categories="stream" href="https://github.com/DataSysResearch/MorphStream"><span class="repo-name">MorphStream</span><span class="repo-role">Transactional stream engine</span><span class="tag">flagship</span><span class="arrow">↗</span></a>
<a class="repo-row" data-categories="stream vector" href="https://github.com/DataSysResearch/BriskFlow"><span class="repo-name">BriskFlow</span><span class="repo-role">Join-backed semantic-window engine</span><span class="tag tag-green">system</span><span class="arrow">↗</span></a>
<a class="repo-row" data-categories="vector benchmark" href="https://github.com/DataSysResearch/CANDOR-Bench"><span class="repo-name">CANDOR-Bench</span><span class="repo-role">Continuous ANNS benchmark</span><span class="tag">flagship</span><span class="arrow">↗</span></a>
<a class="repo-row" data-categories="graph" href="https://github.com/DataSysResearch/GRACE"><span class="repo-name">GRACE</span><span class="repo-role">Dynamic graph processing</span><span class="tag">flagship</span><span class="arrow">↗</span></a>
<a class="repo-row" data-categories="stream benchmark" href="https://github.com/DataSysResearch/Sesame"><span class="repo-name">Sesame</span><span class="repo-role">Stream clustering system</span><span class="tag">flagship</span><span class="arrow">↗</span></a>
<a class="repo-row" data-categories="vector benchmark" href="https://github.com/DataSysResearch/vasg"><span class="repo-name">vasg</span><span class="repo-role">CANDOR vector-index derivative</span><span class="tag tag-green">maintained</span><span class="arrow">↗</span></a>
<a class="repo-row" data-categories="compute" href="https://github.com/DataSysResearch/AMM-Algorithms"><span class="repo-name">AMM-Algorithms</span><span class="repo-role">Framework-neutral AMM library</span><span class="tag tag-green">library</span><span class="arrow">↗</span></a>
<a class="repo-row" data-categories="compute benchmark" href="https://github.com/DataSysResearch/LibAMM"><span class="repo-name">LibAMM</span><span class="repo-role">Approximate matrix benchmark</span><span class="tag tag-amber">benchmark</span><span class="arrow">↗</span></a>
<a class="repo-row" data-categories="stream" href="https://github.com/DataSysResearch/AllianceDB"><span class="repo-name">AllianceDB</span><span class="repo-role">Modern data processing research</span><span class="tag tag-green">system</span><span class="arrow">↗</span></a>
<a class="repo-row" data-categories="stream" href="https://github.com/DataSysResearch/CStream"><span class="repo-name">CStream</span><span class="repo-role">Stream-processing artifact</span><span class="tag">research</span><span class="arrow">↗</span></a>
<a class="repo-row" data-categories="stream" href="https://github.com/DataSysResearch/PECJ"><span class="repo-name">PECJ</span><span class="repo-role">Out-of-order stream join</span><span class="tag">operator</span><span class="arrow">↗</span></a>
<a class="repo-row" data-categories="stream benchmark" href="https://github.com/DataSysResearch/PDSC"><span class="repo-name">PDSC</span><span class="repo-role">Parallel stream clustering</span><span class="tag tag-amber">benchmark</span><span class="arrow">↗</span></a>
<a class="repo-row" data-categories="benchmark" href="https://github.com/DataSysResearch/CFInjectBench"><span class="repo-name">CFInjectBench</span><span class="repo-role">Fault-injection evaluation</span><span class="tag tag-amber">benchmark</span><span class="arrow">↗</span></a>
<a class="repo-row" data-categories="vector benchmark" href="https://github.com/DataSysResearch/CC-bench-tools"><span class="repo-name">CC-bench-tools</span><span class="repo-role">Concurrent graph-ANNS tooling</span><span class="tag tag-amber">tooling</span><span class="arrow">↗</span></a>
<a class="repo-row" data-categories="stream benchmark" href="https://github.com/DataSysResearch/SentiStream"><span class="repo-name">SentiStream</span><span class="repo-role">Streaming sentiment system</span><span class="tag">research</span><span class="arrow">↗</span></a>
<a class="repo-row" data-categories="stream" href="https://github.com/DataSysResearch/StreamFP"><span class="repo-name">StreamFP</span><span class="repo-role">Continuous processing research</span><span class="tag">research</span><span class="arrow">↗</span></a>
<a class="repo-row" data-categories="stream" href="https://github.com/DataSysResearch/SRTFD"><span class="repo-name">SRTFD</span><span class="repo-role">Streaming research artifact</span><span class="tag">research</span><span class="arrow">↗</span></a>
<a class="repo-row" data-categories="resource stream" href="https://github.com/DataSysResearch/StreamProcessing_ReadingList"><span class="repo-name">Stream Processing Reading List</span><span class="repo-role">Curated community references</span><span class="tag tag-cyan">resource</span><span class="arrow">↗</span></a>
<a class="repo-row" data-categories="resource stream" href="https://github.com/DataSysResearch/parallel-distributed-state-management-survey"><span class="repo-name">State Management Survey</span><span class="repo-role">Parallel and distributed state research</span><span class="tag tag-cyan">resource</span><span class="arrow">↗</span></a>
</div>
</section>
<section class="section baselines" id="baselines">
<div class="section-head">
<div><p class="eyebrow">Evaluation dependencies</p><h2>Upstream baseline network.</h2></div>
<p>Fork history and upstream authorship stay explicit. These repositories support reproducibility; they are not presented as DataSys-authored systems.</p>
</div>
<div class="baseline-grid">
<a href="https://github.com/DataSysResearch/Parlay-HNSW"><strong>Parlay-HNSW</strong><span>ParlayANN source network</span><em>HNSW</em></a>
<a href="https://github.com/DataSysResearch/Concurrent-HNSW"><strong>Concurrent-HNSW</strong><span>hnswlib source network</span><em>HNSW</em></a>
<a href="https://github.com/DataSysResearch/hnswlib"><strong>hnswlib</strong><span>nmslib upstream snapshot</span><em>HNSW</em></a>
<a href="https://github.com/DataSysResearch/cufe"><strong>cufe</strong><span>Microsoft DiskANN source network</span><em>DiskANN</em></a>
<a href="https://github.com/DataSysResearch/IP-DiskANN"><strong>IP-DiskANN</strong><span>CANDOR pinned dependency</span><em>DiskANN</em></a>
<a href="https://github.com/DataSysResearch/big-ann-benchmarks"><strong>big-ann-benchmarks</strong><span>Billion-scale evaluation</span><em>Benchmark</em></a>
</div>
</section>
<section class="section ecosystem" id="ecosystem">
<div class="section-head">
<div><p class="eyebrow">Shared architecture</p><h2>One ecosystem. Clear ownership.</h2></div>
<p>IntelliStream incubates across layers. Mature projects graduate to the organization that owns their durable technical boundary.</p>
</div>
<div class="architecture">
<a href="https://lab.sage.org.ai/"><span>00</span><strong>IntelliStream</strong><small>Cross-layer research incubator</small></a>
<a href="https://sage.org.ai/"><span>01</span><strong>SAGE</strong><small>Applications, agents, RAG, workflows</small></a>
<a class="active" href="#top"><span>02</span><strong>DataSys</strong><small>Streams, graphs, vectors, indexes</small></a>
<a href="https://vllm-hust.sage.org.ai/"><span>03</span><strong>vLLM-HUST</strong><small>Runtime, scheduling, kernels, hardware</small></a>
</div>
</section>
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