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Add 'weighted' DRS algorithm, and speed up DRS plan generation - #14111

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bhouse-nexthop wants to merge 19 commits into

apache:mainfrom

bhouse-nexthop:drs-weighted

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Add 'weighted' DRS algorithm, and speed up DRS plan generation#14111
bhouse-nexthop wants to merge 19 commits into
apache:mainfrom
bhouse-nexthop:drs-weighted

Commits on Oct 26, 2026
- Add a DAO method to count VMs per host
  
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- Track a moving average of real host utilisation
  
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  b17771d
- Add 'balancedweighted' VM allocation algorithm
  
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  3d9d884
- Fix three defects found in review of the weighted scoring
  
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  2f6fc75
- Address the rest of the weighted scoring review
  
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- Fix unreachable and NPE-prone branch in host anti-affinity
  
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- Honor planned placements in host anti-affinity
  
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- Honor planned placements in non-strict host affinity
  
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- Re-check affinity before executing each DRS migration
  
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- Make the DRS affinity check correct
  
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- Address the rest of the DRS anti-affinity review
  
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- Stop DRS planning from redoing the same work
  
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- Add 'weighted' DRS algorithm
  
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  5ce3f80
- Fix defects found in review of the weighted DRS algorithm
  
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  3abbdf5
- Verify equivalent VMs share one candidate host lookup
  
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- Declare the host load tracker where both its consumers can see it
  
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  dacb1c8
- Re-check every migration, not only VMs in an affinity group
  
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- Address review feedback on the weighted allocation algorithm
  
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- Rank each candidate host once, however many tags it carries
  
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Commits

Commits on Oct 26, 2026