~/talk

Postcopy live-migration with vhost user backend

on YouTube 25m
Talkat DevConf.CZ 2019 · 2019-01-25..01-27· [networking]

speaker

name:Maxime Coquelin
links:none on file

resources

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

summary

Adds a post-copy mode to the DPDK vhost-user backend and measures how it changes packet and VM behavior versus pre-copy. Describes the implementation: bitmap tracking of dirty pages, a notify/socket handshake to request missing pages, and the atomic remote-start of the destination VM so execution resumes before all pages arrive. Shows benchmarks: iteration counts and downtime drop but higher page-fault rates and extra network roundtrips, so throughput improves in some NFV workloads while latency-sensitive apps can regress.

AI-written summary · about

chapters (8)

  1. 0:00Postcopy live-migration intro
  2. 3:35Pre-copy vs post-copy concepts
  3. 7:05Memory page tracking
  4. 10:31Transfer missing pages
  5. 14:30Cooperative vs non-cooperative
  6. 17:55Benchmarking performance
  7. 20:52Fault detection and error handling
  8. 22:03Conclusion

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