~/talk

Crescent: Emulating Heterogeneous Production Network at Scale

on YouTube 17m
Talkat 21st USENIX Symposium on Networked Systems Design and Implementation (NSDI '24) · 2024-04-16..04-18· [networking]

speakers

name:Zhaoyu Gao
links:none on file
name:Anubhavnidhi Abhashkumar
links:none on file
name:Zhen Sun
links:none on file
name:Weirong Jiang
links:none on file
name:Yi Wang
links:none on file

resources

video:https://youtu.be/5Dp9nw8hfN8
slides:none on file

summary

Crescent emulates production networks by running switch vendor images inside containers and links them with veth pairs and OVS VXLAN, trading full-network coverage for a canary testbed that includes all core devices and representative noncore devices. A graph-partitioning assignment minimizes cross-host links so partitioning reduces testbed bootup time by up to 20× versus random placement, and an incremental reconfiguration path makes live modifications up to 30× faster than rebuilding a testbed. Deployed for 3.5 years, Crescent measurably cuts change-induced incidents.

AI-written summary · about

chapters (7)

  1. 0:00Crescent introduction and goals
  2. 2:51Incident example: network change risks
  3. 8:30Three years of network incidents
  4. 9:55Network symmetry and system design
  5. 10:58Crescent system implementation
  6. 13:52Evaluation and production impact
  7. 16:24Summary and future directions

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