TikTok System Architecture & Recs Simulator

Drag nodes, trace uploaded video transcodes, & watch Two-Tower engagement learning loops.

t = 0.0s

Speed Seed

Preset Scenarios

Creator Upload Rate 0.2/s

Transcoder Threads 3

CDN Cache Capacity 40

Viewer Client Bandwidth 10 Mbps

1 = Low (2 Mbps), 2 = Med (10 Mbps), 3 = High (50 Mbps)

Pre-fetch Buffer Limit 2 vids

Viewer Swipe Speed Normal

1 = Slow (longer watch), 2 = Normal, 3 = Fast (quicker swipes)

User True Preference

Real-time Recs Feedback

Video uploads / chunks Recs queries / vectors Positive engagement Misses / errors Background pre-fetches

Transcode Queue Lag

0 vids

CDN Chunk Latency

15ms

Pre-fetch Buffer Health

6.0s

Recs Alignment Score

50%

Session Retention

100%

Video Views Count

Component	Status	Load / Active

Click a component node on the canvas to inspect its variables and live states in real-time.