~/talk

Bifrost: Alibaba's Next-Generation VPC Network with High-Performance Multipath...

on YouTube 17m
Talkat NSDI '26 · 2026-05-04..05-06· [networking, cloud-infrastructure]

speakers

name:Zihao Fan
links:none on file
name:Xing Li
links:none on file
name:Ye Yang
links:none on file
name:Bo Jiang
links:none on file
name:Bowen Yang
links:none on file
name:Yilong Lv
links:none on file
name:Yuke Hong
links:none on file
name:Yinian Zhou
links:none on file
name:Junnan Cai
links:none on file
name:Jiayue Xu
links:none on file
name:Yunrui Hu
links:none on file
name:Zhao Gao
links:none on file
name:Ke Sun
links:none on file
name:Yimin Liu
links:none on file
name:Xiangdong Zhang
links:none on file
name:Enge Song
links:none on file
name:Jianyuan Lu
links:none on file
name:Xiaoqing Sun
links:none on file
name:Shize Zhang
links:none on file
name:Haonan Li
links:none on file
name:Mingxin Li
links:none on file
name:Changgang Zheng
links:none on file
name:Yang Song
links:none on file
name:Jun Liang
links:none on file
name:Biao Lyu
links:none on file
name:Rong Wen
links:none on file
name:Zhigang Zong
links:none on file
name:Shunmin Zhu
links:none on file

resources

video:https://youtu.be/L5GYcMK18mI
slides:none on file

summary

Bifrost moves reliable transport out of the VM into the VPC by inserting a new header and running a transport engine beside AVS on the SmartNIC, using RTT-aware multipath packet spraying to avoid hotspots, in-place guest reordering by reordering DMA descriptors so the guest sees ordered packets, and delayed bitmap ACKs with 4 ms RTO. It supports O(100k) concurrent connections per SmartNIC with 1 GB memory, achieves <1 s failure recovery, and reports up to 307× tail-latency reduction for Redis and 66× for Nginx in production deployment.

AI-written summary · about

chapters (11)

  1. 0:00Alibaba Cloud VPC intro
  2. 2:26VPC performance evolution
  3. 3:34Reliable transport motivation
  4. 6:00Network reliability challenges
  5. 7:25Bifrost architecture overview
  6. 9:09RTT-aware multipath spraying
  7. 11:20In-order delivery design
  8. 12:46Delayed ACK performance gains
  9. 14:13Memory efficiency in Bifrost
  10. 15:01Real-world deployment results
  11. 15:25Conclusion and future

related talks

~/search
type to search 6,249 conferences, 138,987 speakers and 185,172 talks
~/help
cmdctrl k
search every conference, speaker and series
/
focus the filter search
h
home
c
conferences
s
speakers
e
series
t
light / dark — the status bar button does the same
?
this help
esc
close this, then clear every filter — or just the search, while you are typing in it

Ignored while you are typing. Pages without a filter rail have no search to focus.