Fix region aware placement policy disk weight dose not update.#4522
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StevenLuMT merged 2 commits intoFeb 14, 2025
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Looks good.
Thank you for the fix.
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reopen's reason: rerun failure checks |
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* Fix region aware placement policy disk weight dose not update. (cherry picked from commit 55d274b)
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* Fix region aware placement policy disk weight dose not update. (cherry picked from commit 55d274b)
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Motivation
We are using region aware policy in our Pulsar cluster and enable the disk weight base placement feature.
There are different CVMs with different free disk space in a region, but we found that the traffic still seems to be balanced and is not distributed according to the weight of the free disk space.
The root cause of this case is that the disk weight information actually used to allocate bookies in
RegionAwareEnsemblePlacementPolicyhas not been updated at all.The
RegionAwareEnsemblePlacementPolicyactually choose bookies for ensemble byRackawareEnsemblePlacementPolicyof each region inperRegionPlacement, seeorg.apache.bookkeeper.client.RegionAwareEnsemblePlacementPolicy#newEnsemble.RegionAwareEnsemblePlacementPolicy.updateBookieInfodose not update thebookieInfoMapinRackawareEnsemblePlacementPolicyof each region inperRegionPlacement, which results that the disk weight information actually used to allocate bookies inRegionAwareEnsemblePlacementPolicyhas not been updated at all.Changes
updateBookieInfoinRegionAwareEnsemblePlacementPolicy, update the bookie info inRackawareEnsemblePlacementPolicyof each region inperRegionPlacement.org.apache.bookkeeper.client.TestRegionAwareEnsemblePlacementPolicy#testRegionsWithDifferentDiskWeight.