Design a Massive Scale Discussion Platform (Reddit)

Design a High-Scalability Social News Aggregator

Design a system similar to Reddit that supports millions of active users. The system must handle community creation (subreddits), threaded discussions with deeply nested comments, and a high-concurrency voting system. Focus on the architecture for ranking feeds (Hot/Top), managing extreme write bursts on popular content, and ensuring low-latency read access to community feeds. Discuss how you would handle data consistency for vote counts and the strategy for scaling the storage of billions of comments.
PostgreSQLRedisKafkaS3CloudFrontCitusKubernetesElasticsearchProtobuf
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Design a Massive Scale Discussion Platform (Reddit)

Design a community-based discussion platform similar to Reddit. The system must support millions of concurrent users who can join sub-communities, create posts with text or images, engage in deeply nested comment threads, and participate in a high-velocity upvote/downvote system. Focus specifically on how you would architect the feed ranking (Hot/Top) at scale, handle the massive write-throughput of the voting system, and ensure low-latency access to popular content during viral events. Discuss your storage choices for both relational metadata and high-volume event logs, and how you would maintain high availability for a globally distributed user base.
PostgreSQLCassandraRedisKafkaCDNS3KubernetesgRPCZSETGo
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