{"adoption": {"forks": 250, "observed_at": "2026-08-28T04:09:13.611298+00:00", "stars": 5244}, "canonical_url": "https://ross.abutalabs.com/products/noria", "card": {"archived": false, "artifact_type": "service", "description": "Fast web applications through dynamic, partially-stateful dataflow", "domain": ["databases", "web-development", "backend", "microservices"], "enriched": true, "function": ["database", "caching", "streaming", "search-engine"], "health_score": 20, "homepage": null, "language": "Rust", "license": "Apache-2.0", "license_family": "permissive", "maturity": "maintenance", "member_repos": ["mit-pdos/noria"], "name": "mit-pdos/noria", "platform": ["rust", "self-hosted"], "pushed_at": "2021-10-30T01:24:05+00:00", "repo": "mit-pdos/noria", "stars": 5244, "tags": ["materialized-views", "dataflow", "stream-processing", "sql", "mysql-adapter", "research-system", "data-engineering", "linux", "docker"], "topics": [], "urls": [], "use_cases": ["speed up read-heavy web application backends without manual caching", "replace MySQL or MariaDB with a faster drop-in storage backend", "maintain incrementally-updated materialized views for SQL queries", "cache relational query results like memcached but always consistent", "run Lobsters-like workloads with 5x higher throughput", "dynamically change queries and data-flow at runtime"], "what_it_is": "Noria is a streaming data-flow storage backend written in Rust that acts like a database but precomputes and incrementally maintains materialized views of SQL query results. It uses partially-stateful data-flow to keep cached results up-to-date as base tables change, giving read-heavy web applications extremely fast reads and high write throughput.", "when_to_avoid": ["you need a production-hardened database with broad ecosystem support", "your workload is write-heavy or requires full SQL feature coverage", "you cannot operate additional infrastructure like ZooKeeper"], "when_to_choose": ["your web app is bottlenecked on repeated SQL reads and you want automatic, always-fresh caching", "you want materialized views maintained incrementally without manual cache invalidation", "you can adopt a research-grade Rust storage system and run ZooKeeper"]}, "data_as_of": "2026-08-30T08:39:29.467469+00:00", "members": [{"path": "/products/noria", "repo": "mit-pdos/noria", "role": "main", "score": 32}], "provenance": {"archived": {"kind": "observed", "observed_at": "2026-08-28T04:09:13.611298+00:00", "source": "github"}, "artifact_type": {"confidence": null, "enriched_at": "2026-08-29T17:59:35.945157+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "5a994325883fcd7e5ba69ccdf6519526c5898d2a44f84cf1e727530c913c1756", "fetched_at": "2026-08-28T04:09:13.611298+00:00", "kind": "readme", "missing": false, "url": "https://github.com/mit-pdos/noria"}, {"content_hash": "6671d95db20ec037baa750318a0aba5ca8774439829af596f48cd25f4827df9c", "fetched_at": "2026-08-29T08:54:40.306936+00:00", "kind": "registry_crates", "missing": false, "url": "https://crates.io/api/v1/crates/noria"}], "taxonomy_version": 1}, "description": {"kind": "observed", "observed_at": "2026-08-28T04:09:13.611298+00:00", "source": "github"}, "domain": {"confidence": null, "enriched_at": "2026-08-29T17:59:35.945157+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "5a994325883fcd7e5ba69ccdf6519526c5898d2a44f84cf1e727530c913c1756", "fetched_at": "2026-08-28T04:09:13.611298+00:00", "kind": "readme", "missing": false, "url": "https://github.com/mit-pdos/noria"}, {"content_hash": "6671d95db20ec037baa750318a0aba5ca8774439829af596f48cd25f4827df9c", "fetched_at": "2026-08-29T08:54:40.306936+00:00", "kind": "registry_crates", "missing": false, "url": "https://crates.io/api/v1/crates/noria"}], "taxonomy_version": 1}, "enriched": {"inputs": [], "kind": "computed", "method": "enrichment_status"}, "function": {"confidence": null, "enriched_at": "2026-08-29T17:59:35.945157+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "5a994325883fcd7e5ba69ccdf6519526c5898d2a44f84cf1e727530c913c1756", "fetched_at": "2026-08-28T04:09:13.611298+00:00", "kind": "readme", "missing": false, "url": "https://github.com/mit-pdos/noria"}, {"content_hash": "6671d95db20ec037baa750318a0aba5ca8774439829af596f48cd25f4827df9c", "fetched_at": "2026-08-29T08:54:40.306936+00:00", "kind": "registry_crates", "missing": false, "url": "https://crates.io/api/v1/crates/noria"}], "taxonomy_version": 1}, "health_score": {"inputs": ["days_since_push", "days_since_release", "archived"], "kind": "computed", "method": "health_v1"}, "homepage": {"kind": "observed", "observed_at": "2026-08-28T04:09:13.611298+00:00", "source": "github"}, "language": {"kind": "observed", "observed_at": "2026-08-28T04:09:13.611298+00:00", "source": "github"}, "license": {"kind": "observed", "observed_at": "2026-08-28T04:09:13.611298+00:00", "source": "github"}, "license_family": {"inputs": ["license"], "kind": "computed", "method": "license_family"}, "maturity": {"confidence": null, "enriched_at": "2026-08-29T17:59:35.945157+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "5a994325883fcd7e5ba69ccdf6519526c5898d2a44f84cf1e727530c913c1756", "fetched_at": "2026-08-28T04:09:13.611298+00:00", "kind": "readme", "missing": false, "url": "https://github.com/mit-pdos/noria"}, {"content_hash": "6671d95db20ec037baa750318a0aba5ca8774439829af596f48cd25f4827df9c", "fetched_at": "2026-08-29T08:54:40.306936+00:00", "kind": "registry_crates", "missing": false, "url": "https://crates.io/api/v1/crates/noria"}], "taxonomy_version": 1}, "member_repos": {"kind": "observed", "observed_at": "2026-08-28T04:09:13.611298+00:00", "source": "github"}, "name": {"kind": "observed", "observed_at": "2026-08-28T04:09:13.611298+00:00", "source": "github"}, "platform": {"confidence": null, "enriched_at": "2026-08-29T17:59:35.945157+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "5a994325883fcd7e5ba69ccdf6519526c5898d2a44f84cf1e727530c913c1756", "fetched_at": "2026-08-28T04:09:13.611298+00:00", "kind": "readme", "missing": false, "url": "https://github.com/mit-pdos/noria"}, {"content_hash": "6671d95db20ec037baa750318a0aba5ca8774439829af596f48cd25f4827df9c", "fetched_at": "2026-08-29T08:54:40.306936+00:00", "kind": "registry_crates", "missing": false, "url": "https://crates.io/api/v1/crates/noria"}], "taxonomy_version": 1}, "pushed_at": {"kind": "observed", "observed_at": "2026-08-28T04:09:13.611298+00:00", "source": "github"}, "repo": {"kind": "observed", "observed_at": "2026-08-28T04:09:13.611298+00:00", "source": "github"}, "stars": {"kind": "observed", "observed_at": "2026-08-28T04:09:13.611298+00:00", "source": "github"}, "tags": {"confidence": null, "enriched_at": "2026-08-29T17:59:35.945157+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "5a994325883fcd7e5ba69ccdf6519526c5898d2a44f84cf1e727530c913c1756", "fetched_at": "2026-08-28T04:09:13.611298+00:00", "kind": "readme", "missing": false, "url": "https://github.com/mit-pdos/noria"}, {"content_hash": "6671d95db20ec037baa750318a0aba5ca8774439829af596f48cd25f4827df9c", "fetched_at": "2026-08-29T08:54:40.306936+00:00", "kind": "registry_crates", "missing": false, "url": "https://crates.io/api/v1/crates/noria"}], "taxonomy_version": 1}, "topics": {"kind": "observed", "observed_at": "2026-08-28T04:09:13.611298+00:00", "source": "github"}, "urls": {"kind": "observed", "observed_at": "2026-08-28T04:09:13.611298+00:00", "source": "github"}, "use_cases": {"confidence": null, "enriched_at": "2026-08-29T17:59:35.945157+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "5a994325883fcd7e5ba69ccdf6519526c5898d2a44f84cf1e727530c913c1756", "fetched_at": "2026-08-28T04:09:13.611298+00:00", "kind": "readme", "missing": false, "url": "https://github.com/mit-pdos/noria"}, {"content_hash": "6671d95db20ec037baa750318a0aba5ca8774439829af596f48cd25f4827df9c", "fetched_at": "2026-08-29T08:54:40.306936+00:00", "kind": "registry_crates", "missing": false, "url": "https://crates.io/api/v1/crates/noria"}], "taxonomy_version": 1}, "what_it_is": {"confidence": null, "enriched_at": "2026-08-29T17:59:35.945157+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "5a994325883fcd7e5ba69ccdf6519526c5898d2a44f84cf1e727530c913c1756", "fetched_at": "2026-08-28T04:09:13.611298+00:00", "kind": "readme", "missing": false, "url": "https://github.com/mit-pdos/noria"}, {"content_hash": "6671d95db20ec037baa750318a0aba5ca8774439829af596f48cd25f4827df9c", "fetched_at": "2026-08-29T08:54:40.306936+00:00", "kind": "registry_crates", "missing": false, "url": "https://crates.io/api/v1/crates/noria"}], "taxonomy_version": 1}, "when_to_avoid": {"confidence": null, "enriched_at": "2026-08-29T17:59:35.945157+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "5a994325883fcd7e5ba69ccdf6519526c5898d2a44f84cf1e727530c913c1756", "fetched_at": "2026-08-28T04:09:13.611298+00:00", "kind": "readme", "missing": false, "url": "https://github.com/mit-pdos/noria"}, {"content_hash": "6671d95db20ec037baa750318a0aba5ca8774439829af596f48cd25f4827df9c", "fetched_at": "2026-08-29T08:54:40.306936+00:00", "kind": "registry_crates", "missing": false, "url": "https://crates.io/api/v1/crates/noria"}], "taxonomy_version": 1}, "when_to_choose": {"confidence": null, "enriched_at": "2026-08-29T17:59:35.945157+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "5a994325883fcd7e5ba69ccdf6519526c5898d2a44f84cf1e727530c913c1756", "fetched_at": "2026-08-28T04:09:13.611298+00:00", "kind": "readme", "missing": false, "url": "https://github.com/mit-pdos/noria"}, {"content_hash": "6671d95db20ec037baa750318a0aba5ca8774439829af596f48cd25f4827df9c", "fetched_at": "2026-08-29T08:54:40.306936+00:00", "kind": "registry_crates", "missing": false, "url": "https://crates.io/api/v1/crates/noria"}], "taxonomy_version": 1}}, "score": {"components": {"activity": 0, "longevity": 100, "rhythm": 35}, "computed_at": "2026-09-03T02:20:16.233290+00:00", "flags": ["no_releases"], "formula": "round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)", "inputs": {"age_days": 3732, "days_push": 1769, "days_rel": null, "gap_med": null, "n_releases_24m": 0}, "score": 32, "version": 2}, "staleness": {"enrichment_outdated": false, "low_confidence": false, "scrape_days": 9, "stale_scrape": false}}