[improve] [pip] PIP-354: apply topK mechanism to ModularLoadManagerImpl #22765
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BewareMyPower
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May 23, 2024
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Please add a warning that too small |
Updated, please take a look again, thanks. |
heesung-sn
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May 24, 2024
Demogorgon314
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May 27, 2024
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May 28, 2024
…pl (#22753) Implementation PR for #22765 ### Motivation `ModularLoadManagerImpl` rely on zk to store and synchronize metadata about load, which pose greate pressure on zk, threatening the stability of system. Every broker will upload its `LocalBrokerData` to zk, and leader broker will retrieve all `LocalBrokerData` from zk, generate all `BundleData` from each `LocalBrokerData`, and update all `BundleData` to zk. As every bundle in the cluster corresponds to a zk node, it is common that there are thousands of zk nodes in a cluster, which results into thousands of read/update operations to zk. This will cause a lot of pressure on zk. **As All Load Shedding Algorithm pick bundles from top to bottom based on throughput/msgRate, bundles with low throughput/msgRate are rarely be selected for shedding. So that we don't need to contain these bundles in the bundle load report.** ### Modifications Reuse the configuration loadBalancerMaxNumberOfBundlesInBundleLoadReport in ExtensibleLoadManager, apply the topK mechanism to ModularLoadManagerImpl.
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PIP-354
Implementation PR: #22753
Motivation
As every bundle in the cluster corresponds to a zk node, it is common that there are thousands of zk nodes in a cluster, which results into thousands of read/update operations to zk. This will cause a lot of pressure on zk.
As All Load Shedding Algorithm pick bundles from top to bottom based on throughput/msgRate, bundles with low throughput/msgRate are rarely be selected for shedding. So that we don't need to contain these bundles in the bundle load report.
Documentation
docdoc-requireddoc-not-neededdoc-complete