以 Linux XDP (eXpress Data Path) 為基礎的高效率網路負載平衡器
COSCUP 2020
馮會鈞
Agenda
- What is XDP
- A load balancer based on XDP
- XDP playground
What is XDP?
- a subset of eBPF program
- early network packet processing
- attached to the network device driver
Execution mode
Action
- XDP_DROP
- XDP_ABORTED
- XDP_PASS
- XDP_TX
- XDP_REDIRECT
Layer 4 load balancer
Benefits of XDP based LB
- fewer resources spent on each packet
- higher availability
- higher capacity
How XDP load balancer works
Routing decision algorithm
- Modulo division
- Consistent hashing
- Maglev (used by Facebook katran)
Reference
Thank you!
Q&A
以 Linux XDP (eXpress Data Path) 為基礎的高效率網路負載平衡器 COSCUP 2020 馮會鈞
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