Fixing I/O Performance for Windows Guests in OpenStack Ceph Clouds

Fixing I/O Performance for Windows Guests in OpenStack Ceph Clouds

linux.conf.au via YouTube Direct link

Additional Fix #5

17 of 18

17 of 18

Additional Fix #5

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Fixing I/O Performance for Windows Guests in OpenStack Ceph Clouds

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  1. 1 Intro
  2. 2 User Complaints
  3. 3 ceph daemon osd. 1 perf dump (latency)
  4. 4 ceph daemon osd. 1 perf dump (throttle)
  5. 5 ceph daemon osd. 1 dump_ops_in_flight
  6. 6 ceph tell osd.* config set debug_filestore 10
  7. 7 Flamegraph
  8. 8 How FileStore works
  9. 9 Possible Fix #1
  10. 10 Reproduction
  11. 11 madvise(FADVISE_DONTNEED)
  12. 12 Possible Fix #2
  13. 13 512b/4k Disk Alignment ("4K Drives")
  14. 14 Additional Fix #3
  15. 15 Additional Fix #4
  16. 16 Windows 4K alignment
  17. 17 Additional Fix #5
  18. 18 Key Takeaways

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