Kafka Partition Rebalancing & Lag Simulator

Understand partition assignment protocols, consumer groups, strategies, and lag storms.

t = 0.0s

Speed Seed

Preset Scenarios

Consumer count 3

Rebalance strategy

Range divides contiguous segments (P0-P2 to C1), Round Robin interleaves them.

Producer RPS 60 rps

Consumer speed 25 req/s

producer traffic consumer fetch rebalance signal accumulated lag

Total Lag

Throughput

0/s

Publish Rate

0/s

Rebalances

Part	Broker Node	Consumer	Lag

Click on any Consumer's "X" badge on the canvas to crash it and witness how the group coordinator reassigns partitions.