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

Draft

bhouse-nexthop wants to merge 19 commits into

apache:mainfrom

bhouse-nexthop:drs-weighted

Commits on Sep 16, 2026

Add a DAO method to count VMs per host
bhouse-nexthop
committed
e3de848
Track a moving average of real host utilisation
bhouse-nexthop
committed
d9b0403
Add 'balancedweighted' VM allocation algorithm
bhouse-nexthop
committed
af08cf4
Fix three defects found in review of the weighted scoring
bhouse-nexthop
committed
5377993
Address the rest of the weighted scoring review
bhouse-nexthop
committed
e888402
Fix unreachable and NPE-prone branch in host anti-affinity
bhouse-nexthop
committed
dbda9c7
Honor planned placements in host anti-affinity
bhouse-nexthop
committed
bc12fb0
Honor planned placements in non-strict host affinity
bhouse-nexthop
committed
537142e
Re-check affinity before executing each DRS migration
bhouse-nexthop
committed
0db2a8d
Make the DRS affinity check correct
bhouse-nexthop
committed
5d59398
Address the rest of the DRS anti-affinity review
bhouse-nexthop
committed
939fc1f
Stop DRS planning from redoing the same work
bhouse-nexthop
committed
338472e
Add 'weighted' DRS algorithm
bhouse-nexthop
committed
c3016c8
Fix defects found in review of the weighted DRS algorithm
bhouse-nexthop
committed
358e5b6
Verify equivalent VMs share one candidate host lookup
bhouse-nexthop
committed
cc01a72
Declare the host load tracker where both its consumers can see it
bhouse-nexthop
committed
7c41b79
Re-check every migration, not only VMs in an affinity group
bhouse-nexthop
committed
6a02514
Address review feedback on the weighted allocation algorithm
bhouse-nexthop
committed
8a3c8ae
Rank each candidate host once, however many tags it carries
bhouse-nexthop
committed
7bcf58f

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

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 Sep 16, 2026

Add a DAO method to count VMs per host

Track a moving average of real host utilisation

Add 'balancedweighted' VM allocation algorithm

Fix three defects found in review of the weighted scoring

Address the rest of the weighted scoring review

Fix unreachable and NPE-prone branch in host anti-affinity

Honor planned placements in host anti-affinity

Honor planned placements in non-strict host affinity

Re-check affinity before executing each DRS migration

Make the DRS affinity check correct

Address the rest of the DRS anti-affinity review

Stop DRS planning from redoing the same work

Add 'weighted' DRS algorithm

Fix defects found in review of the weighted DRS algorithm

Verify equivalent VMs share one candidate host lookup

Declare the host load tracker where both its consumers can see it

Re-check every migration, not only VMs in an affinity group

Address review feedback on the weighted allocation algorithm

Rank each candidate host once, however many tags it carries