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social-media-management

social publishing, scheduling and inbox

Hootsuite, Buffer

SystemTechniques · 21Primitives · 87 social-media-management Deterministic simulation testingdistributed · medium: Run the whole system in one thread under a seeded scheduler with simulated network, disk and clock, so every failure replays from its seed.›Durable job queuedistributed · medium: Persisted tasks that workers lease for a visibility timeout, ack on success and retry with backoff; at-least-once execution that survives worker and queue crashes.›Primary-backup replicationdistributed · medium: One node orders all writes and ships them to standbys; the acknowledgement rule (none, one, all) sets what a crash loses, and an external arbiter decides who takes over.›Named entity recognitionmachine-learning · medium: Find the character spans of entities in text and give each a type, by labelling every token and decoding a valid label sequence.›Near-duplicate detection with MinHa…machine-learning · medium: Estimate set Jaccard similarity from k min-hashes and find similar pairs with banded LSH buckets; the standard dedup for web crawls, training corpora and sequence collections.›Text classificationmachine-learning · medium: Assign one or more labels to a text; climb a ladder from regexes to linear models on n-grams, embeddings, fine-tuned encoders and LLM prompts, only as far as the data and budget demand.›Video transcoding laddermedia · medium: Turn one source into resolution x bitrate x codec renditions chosen from measured rate-quality points, cut on aligned keyframes so players can switch mid-stream.›Exponential backoff with jittersystems · low: Retry after delays that grow geometrically and are randomized, so failed clients spread out instead of hammering a recovering service in synchronized waves.›Image resampling filtersgraphics · low: Resize an image by convolving with a kernel (box, triangle, cubic, Lanczos) whose width scales with the shrink factor, done as two separable 1-D passes with precomputed weights.›Hdr histogramdata-structures · low: Log-linear bucketed histograms with bounded relative error for latency percentilesProcess supervisionhardware-os · low: A parent process starts services, reaps their exits and restarts them under a delay and burst-limit policy, then stops them with SIGTERM before SIGKILL.›Language identificationmachine-learning · low: Score a text's character n-grams against per-language statistics, after a cheap script check, and return an ISO 639 code with a confidence or "und".›Open and click trackingnetworking · low: Tracking pixels and signed redirect links for engagement eventsAho-Corasick multi-pattern matchingsearch-sort · low: Find all occurrences of many fixed patterns in one pass over the text, in time independent of the pattern count, using a trie with failure links.›Boolean expression indexingsearch-sort · low: Indexing conjunctive targeting expressions so one event finds all matching ads/subscriptions fastTime decay scoringsearch-sort · low: Scoring items by recency with exponential decay or half-life, combined with relevanceURL normalizationsearch-sort · low: Rewrite a URL to one canonical key, in safe RFC 3986 steps plus lossy, site-dependent ones (tracking parameters, query order, fragments), and keep the original beside the key.›Dual control approvalsecurity · low: Four-eyes / maker-checker approval with quorum policies for sensitive operationsMutual TLSsecurity · low: TLS where the client also proves a certificate key, so every connection carries a verified, rotatable machine identity.›OAuth 2 and OpenID Connectsecurity · low: Delegated authorization (OAuth 2) and login on top of it (OIDC); use authorization code + PKCE for every user-facing client.›Graceful drainingsystems · low: On a termination signal, stop taking new work, finish in-flight work until a deadline, tell clients to reconnect elsewhere, then exit; clients resume from a token.›Hierarchical timing wheelsystems · low: Timers bucketed by expiry into wheels of slots, coarser wheels for far deadlines: O(1) insert and cancel for millions of timeouts.›Cooperative schedulingconcurrency · low: Green threads/coroutines yielding at await points on a user-space scheduler+ 14 more techniques+ 71 more primitives

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