{"adoption": {"forks": 410, "observed_at": "2026-08-28T04:05:09.604101+00:00", "stars": 1601}, "canonical_url": "https://ross.abutalabs.com/products/flashcache", "card": {"archived": true, "artifact_type": "library", "description": "A general purpose, write-back block cache for Linux.", "domain": ["databases", "performance", "operating-systems"], "enriched": true, "function": ["caching", "file-system"], "health_score": 10, "homepage": null, "language": "C", "license": "GPL-2.0", "license_family": "copyleft", "maturity": "abandoned", "member_repos": ["facebookarchive/flashcache"], "name": "facebookarchive/flashcache", "platform": ["c"], "pushed_at": "2021-10-13T07:34:21+00:00", "repo": "facebookarchive/flashcache", "stars": 1601, "tags": ["block-cache", "write-back", "kernel-module", "dm-target", "ssd-cache", "archived", "linux"], "topics": [], "urls": [], "use_cases": ["speed up disk-backed databases with an SSD write-back cache", "cache a slow spinning disk with an SSD on Linux", "reduce write latency for MySQL or other storage workloads", "create a device-mapper cached block volume", "add a write-through SSD cache layer for block devices"], "what_it_is": "Flashcache is a Linux kernel module (device-mapper target) that provides a general-purpose write-back block cache, using an SSD to cache reads and writes for slower block devices. It was originally developed at Facebook and is now archived and unmaintained.", "when_to_avoid": ["you need actively maintained software", "you run modern kernels (use bcache, lvmcache, or dm-cache instead)", "you need filesystem-level or distributed caching rather than block-level"], "when_to_choose": ["you must maintain a legacy Linux 2.6-era system already using flashcache", "you need a GPL-2.0 write-back block cache and accept unmaintained code"]}, "data_as_of": "2026-08-30T08:39:29.467469+00:00", "members": [{"path": "/products/flashcache", "repo": "facebookarchive/flashcache", "role": "main", "score": 10}], "provenance": {"archived": {"kind": "observed", "observed_at": "2026-08-28T04:05:09.604101+00:00", "source": "github"}, "artifact_type": {"confidence": null, "enriched_at": "2026-08-30T03:52:47.749122+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "accafd1e73f53b3016d3d9c38bdb291506926f9ea06f3e6fbcfdd7792ca57b33", "fetched_at": "2026-08-28T04:05:09.604101+00:00", "kind": "readme", "missing": false, "url": "https://github.com/facebookarchive/flashcache"}], "taxonomy_version": 1}, "description": {"kind": "observed", "observed_at": "2026-08-28T04:05:09.604101+00:00", "source": "github"}, "domain": {"confidence": null, "enriched_at": "2026-08-30T03:52:47.749122+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "accafd1e73f53b3016d3d9c38bdb291506926f9ea06f3e6fbcfdd7792ca57b33", "fetched_at": "2026-08-28T04:05:09.604101+00:00", "kind": "readme", "missing": false, "url": "https://github.com/facebookarchive/flashcache"}], "taxonomy_version": 1}, "enriched": {"inputs": [], "kind": "computed", "method": "enrichment_status"}, "function": {"confidence": null, "enriched_at": "2026-08-30T03:52:47.749122+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "accafd1e73f53b3016d3d9c38bdb291506926f9ea06f3e6fbcfdd7792ca57b33", "fetched_at": "2026-08-28T04:05:09.604101+00:00", "kind": "readme", "missing": false, "url": "https://github.com/facebookarchive/flashcache"}], "taxonomy_version": 1}, "health_score": {"inputs": ["days_since_push", "days_since_release", "archived"], "kind": "computed", "method": "health_v1"}, "homepage": {"kind": "observed", "observed_at": "2026-08-28T04:05:09.604101+00:00", "source": "github"}, "language": {"kind": "observed", "observed_at": "2026-08-28T04:05:09.604101+00:00", "source": "github"}, "license": {"kind": "observed", "observed_at": "2026-08-28T04:05:09.604101+00:00", "source": "github"}, "license_family": {"inputs": ["license"], "kind": "computed", "method": "license_family"}, "maturity": {"confidence": null, "enriched_at": "2026-08-30T03:52:47.749122+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "accafd1e73f53b3016d3d9c38bdb291506926f9ea06f3e6fbcfdd7792ca57b33", "fetched_at": "2026-08-28T04:05:09.604101+00:00", "kind": "readme", "missing": false, "url": "https://github.com/facebookarchive/flashcache"}], "taxonomy_version": 1}, "member_repos": {"kind": "observed", "observed_at": "2026-08-28T04:05:09.604101+00:00", "source": "github"}, "name": {"kind": "observed", "observed_at": "2026-08-28T04:05:09.604101+00:00", "source": "github"}, "platform": {"confidence": null, "enriched_at": "2026-08-30T03:52:47.749122+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "accafd1e73f53b3016d3d9c38bdb291506926f9ea06f3e6fbcfdd7792ca57b33", "fetched_at": "2026-08-28T04:05:09.604101+00:00", "kind": "readme", "missing": false, "url": "https://github.com/facebookarchive/flashcache"}], "taxonomy_version": 1}, "pushed_at": {"kind": "observed", "observed_at": "2026-08-28T04:05:09.604101+00:00", "source": "github"}, "repo": {"kind": "observed", "observed_at": "2026-08-28T04:05:09.604101+00:00", "source": "github"}, "stars": {"kind": "observed", "observed_at": "2026-08-28T04:05:09.604101+00:00", "source": "github"}, "tags": {"confidence": null, "enriched_at": "2026-08-30T03:52:47.749122+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "accafd1e73f53b3016d3d9c38bdb291506926f9ea06f3e6fbcfdd7792ca57b33", "fetched_at": "2026-08-28T04:05:09.604101+00:00", "kind": "readme", "missing": false, "url": "https://github.com/facebookarchive/flashcache"}], "taxonomy_version": 1}, "topics": {"kind": "observed", "observed_at": "2026-08-28T04:05:09.604101+00:00", "source": "github"}, "urls": {"kind": "observed", "observed_at": "2026-08-28T04:05:09.604101+00:00", "source": "github"}, "use_cases": {"confidence": null, "enriched_at": "2026-08-30T03:52:47.749122+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "accafd1e73f53b3016d3d9c38bdb291506926f9ea06f3e6fbcfdd7792ca57b33", "fetched_at": "2026-08-28T04:05:09.604101+00:00", "kind": "readme", "missing": false, "url": "https://github.com/facebookarchive/flashcache"}], "taxonomy_version": 1}, "what_it_is": {"confidence": null, "enriched_at": "2026-08-30T03:52:47.749122+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "accafd1e73f53b3016d3d9c38bdb291506926f9ea06f3e6fbcfdd7792ca57b33", "fetched_at": "2026-08-28T04:05:09.604101+00:00", "kind": "readme", "missing": false, "url": "https://github.com/facebookarchive/flashcache"}], "taxonomy_version": 1}, "when_to_avoid": {"confidence": null, "enriched_at": "2026-08-30T03:52:47.749122+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "accafd1e73f53b3016d3d9c38bdb291506926f9ea06f3e6fbcfdd7792ca57b33", "fetched_at": "2026-08-28T04:05:09.604101+00:00", "kind": "readme", "missing": false, "url": "https://github.com/facebookarchive/flashcache"}], "taxonomy_version": 1}, "when_to_choose": {"confidence": null, "enriched_at": "2026-08-30T03:52:47.749122+00:00", "kind": "inferred", "prompt_version": 1, "sources": [{"content_hash": "accafd1e73f53b3016d3d9c38bdb291506926f9ea06f3e6fbcfdd7792ca57b33", "fetched_at": "2026-08-28T04:05:09.604101+00:00", "kind": "readme", "missing": false, "url": "https://github.com/facebookarchive/flashcache"}], "taxonomy_version": 1}}, "score": {"components": {"activity": 0, "longevity": 100, "rhythm": 8}, "computed_at": "2026-09-03T02:20:16.233290+00:00", "flags": ["archived"], "formula": "round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)", "inputs": {"age_days": 6009, "days_push": 1785, "days_rel": null, "gap_med": null, "n_releases_24m": 0}, "score": 10, "version": 2}, "staleness": {"enrichment_outdated": false, "low_confidence": false, "scrape_days": 9, "stale_scrape": false}}