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

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bhouse-nexthop wants to merge 21 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 21 commits into
apache:mainfrom
bhouse-nexthop:drs-weighted

Commits on Oct 26, 2026
- Add a DAO method to count VMs per host
  bhouse-nexthop
  committed
  294c1ad
- Track a moving average of real host utilisation
  bhouse-nexthop
  committed
  a05a218
- Add 'balancedweighted' VM allocation algorithm
  bhouse-nexthop
  committed
  6af4f56
- Fix three defects found in review of the weighted scoring
  bhouse-nexthop
  committed
  339b6f6
- Address the rest of the weighted scoring review
  bhouse-nexthop
  committed
  cc6f6bb
- Fix unreachable and NPE-prone branch in host anti-affinity
  bhouse-nexthop
  committed
  3ef02cf
- Honor planned placements in host anti-affinity
  bhouse-nexthop
  committed
  624f14a
- Honor planned placements in non-strict host affinity
  bhouse-nexthop
  committed
  d4fd430
- Re-check affinity before executing each DRS migration
  bhouse-nexthop
  committed
  d612618
- Make the DRS affinity check correct
  bhouse-nexthop
  committed
  4d6085f
- Address the rest of the DRS anti-affinity review
  bhouse-nexthop
  committed
  ea376e0
- Stop DRS planning from redoing the same work
  bhouse-nexthop
  committed
  c994483
- Add 'weighted' DRS algorithm
  bhouse-nexthop
  committed
  6e025e5
- Fix defects found in review of the weighted DRS algorithm
  bhouse-nexthop
  committed
  4bce55c
- Verify equivalent VMs share one candidate host lookup
  bhouse-nexthop
  committed
  d78ae84
- Declare the host load tracker where both its consumers can see it
  bhouse-nexthop
  committed
  8c01934
- Re-check every migration, not only VMs in an affinity group
  bhouse-nexthop
  committed
  c283fbd
- Address review feedback on the weighted allocation algorithm
  bhouse-nexthop
  committed
  7a88112
- Rank each candidate host once, however many tags it carries
  bhouse-nexthop
  committed
  752b454
Commits on Nov 9, 2026
- Sample host load for weighted DRS, not only for the weighted allocator
  bhouse-nexthop
  committed
  bc94968
Commits on Nov 10, 2026
- Let WeightedHostScorer implement HostScoringWeights
  bhouse-nexthop
  committed
  e40f962

Commits

Commits on Oct 26, 2026

Commits on Nov 9, 2026

Commits on Nov 10, 2026