A recent article from a former TikTok Backend Engineer has shed light on the technical details and architecture behind the social media platform's live streaming feature. According to the article, Redis's ZSET is used to implement sorting by likes and pagination for the comment system design. This allows for efficient and scalable processing of user comments during live streams.

Source: https://dev.to/conquerym/tiktok-live-streaming-feature-technical-details-and-architecture-1n0j