load balancing

IP Hashing

Hash client IP to deterministically route to the same server — session affinity without shared state

Total Requests0
Unique IPs0
Last Hash—
Server A
hash % 4 = 0
0
Server B
hash % 4 = 1
0
Server C
hash % 4 = 2
0
Server D
hash % 4 = 3
0

// event log

No events yet.

// how it works

  • hash(clientIP) % numServers = target index
  • Same IP always maps to same server
  • Provides session affinity without cookies/state
  • Try "Demo Stickiness" to see same IPs repeat

// trade-offs

  • Simple session persistence mechanism
  • No shared state needed between LBs
  • Uneven distribution if IPs are clustered
  • Adding/removing servers reshuffles all mappings