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[GitHub] [dubbo] 24kpure opened a new pull request #8758: add peakEwmaLoadBalance

24kpure opened a new pull request #8758:
URL: https://github.com/apache/dubbo/pull/8758


   ## What is the purpose of the change
   I am disappointment with shortestResponseLoadBalance，though  it  is better than others in latency spike. However, it’s slow for it  depends on average.I am looking forwad to a sensitive loadbance.
   
   PeakEwmaLoadBalance is designed to converge quickly when encountering slow endpoints.
   It is quick to react to latency spikes recovering only cautiously.Peak EWMA takes history into account,so that slow behavior is penalized relative to the supplied `decayTime`.
   
   Inspiration drawn from:[finagle](https://github.com/twitter/finagle/blob/1bc837c4feafc0096e43c0e98516a8e1c50c4421/finagle-core/src/main/scala/com/twitter/finagle/loadbalancer/PeakEwma.scala)
   
   ## note
   We will have a try first and  feed back to the community in time.
   
   ## Brief changelog
   -  calculate cost by exponential moving averages
   -  add decayTime
   -  ignore invoker‘s weight
   
   ## Reference
   [finagle](https://github.com/twitter/finagle/blob/1bc837c4feafc0096e43c0e98516a8e1c50c4421/finagle-core/src/main/scala/com/twitter/finagle/loadbalancer/PeakEwma.scala)
   [apisix](https://github.com/apache/apisix/blob/131998df4f44720b7ddf0424f4d381efb689d4ce/apisix/balancer/ewma.lua
   )
   [paper](http://www.eckner.com/papers/Algorithms%20for%20Unevenly%20Spaced%20Time%20Series.pdf)
   
   
   
   
   
   
   
   


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[GitHub] [dubbo] AlbumenJ commented on pull request #8758: add peakEwmaLoadBalance

Posted by GitBox <gi...@apache.org>.
AlbumenJ commented on pull request #8758:
URL: https://github.com/apache/dubbo/pull/8758#issuecomment-917624641


   Please move this feature to dubbo-spi-extensions


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[GitHub] [dubbo] codecov-commenter commented on pull request #8758: add peakEwmaLoadBalance

Posted by GitBox <gi...@apache.org>.
codecov-commenter commented on pull request #8758:
URL: https://github.com/apache/dubbo/pull/8758#issuecomment-916312106


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   > Merging [#8758](https://codecov.io/gh/apache/dubbo/pull/8758?src=pr&el=desc&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=The+Apache+Software+Foundation) (7b41f07) into [3.0](https://codecov.io/gh/apache/dubbo/commit/1b100f84cb51a590c865e2d28d159b4d4c203409?el=desc&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=The+Apache+Software+Foundation) (1b100f8) will **increase** coverage by `0.04%`.
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   ```diff
   @@             Coverage Diff              @@
   ##                3.0    #8758      +/-   ##
   ============================================
   + Coverage     63.70%   63.75%   +0.04%     
   + Complexity      312      311       -1     
   ============================================
     Files          1145     1146       +1     
     Lines         48188    48235      +47     
     Branches       7255     7261       +6     
   ============================================
   + Hits          30699    30751      +52     
   + Misses        14123    14122       -1     
   + Partials       3366     3362       -4     
   ```
   
   
   | [Impacted Files](https://codecov.io/gh/apache/dubbo/pull/8758?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=The+Apache+Software+Foundation) | Coverage Δ | |
   |---|---|---|
   | [...o/rpc/cluster/loadbalance/PeakEwmaLoadBalance.java](https://codecov.io/gh/apache/dubbo/pull/8758/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=The+Apache+Software+Foundation#diff-ZHViYm8tY2x1c3Rlci9zcmMvbWFpbi9qYXZhL29yZy9hcGFjaGUvZHViYm8vcnBjL2NsdXN0ZXIvbG9hZGJhbGFuY2UvUGVha0V3bWFMb2FkQmFsYW5jZS5qYXZh) | `95.74% <95.74%> (ø)` | |
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   | [.../apache/dubbo/remoting/transport/AbstractPeer.java](https://codecov.io/gh/apache/dubbo/pull/8758/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=The+Apache+Software+Foundation#diff-ZHViYm8tcmVtb3RpbmcvZHViYm8tcmVtb3RpbmctYXBpL3NyYy9tYWluL2phdmEvb3JnL2FwYWNoZS9kdWJiby9yZW1vdGluZy90cmFuc3BvcnQvQWJzdHJhY3RQZWVyLmphdmE=) | `65.21% <0.00%> (-4.35%)` | :arrow_down: |
   | [.../client/metadata/ServiceInstanceMetadataUtils.java](https://codecov.io/gh/apache/dubbo/pull/8758/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=The+Apache+Software+Foundation#diff-ZHViYm8tcmVnaXN0cnkvZHViYm8tcmVnaXN0cnktYXBpL3NyYy9tYWluL2phdmEvb3JnL2FwYWNoZS9kdWJiby9yZWdpc3RyeS9jbGllbnQvbWV0YWRhdGEvU2VydmljZUluc3RhbmNlTWV0YWRhdGFVdGlscy5qYXZh) | `84.61% <0.00%> (-2.89%)` | :arrow_down: |
   | [...e/dubbo/remoting/transport/netty/NettyChannel.java](https://codecov.io/gh/apache/dubbo/pull/8758/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=The+Apache+Software+Foundation#diff-ZHViYm8tcmVtb3RpbmcvZHViYm8tcmVtb3RpbmctbmV0dHkvc3JjL21haW4vamF2YS9vcmcvYXBhY2hlL2R1YmJvL3JlbW90aW5nL3RyYW5zcG9ydC9uZXR0eS9OZXR0eUNoYW5uZWwuamF2YQ==) | `54.54% <0.00%> (-1.14%)` | :arrow_down: |
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   | [...ava/org/apache/dubbo/common/utils/ConfigUtils.java](https://codecov.io/gh/apache/dubbo/pull/8758/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=The+Apache+Software+Foundation#diff-ZHViYm8tY29tbW9uL3NyYy9tYWluL2phdmEvb3JnL2FwYWNoZS9kdWJiby9jb21tb24vdXRpbHMvQ29uZmlnVXRpbHMuamF2YQ==) | `69.51% <0.00%> (-0.61%)` | :arrow_down: |
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[GitHub] [dubbo] 24kpure commented on pull request #8758: add peakEwmaLoadBalance

Posted by GitBox <gi...@apache.org>.
24kpure commented on pull request #8758:
URL: https://github.com/apache/dubbo/pull/8758#issuecomment-917804416


   That's a good idea. Dubbo is gradually weakening the concepts of load balancing and routing in 3.0,but I still want to fight for it. If we don't use service mesh for traffic distribution, a new smart loadBalance will be good for Dubbo. The existing loadBalance can not be adjusted adaptively and peakEwma  is a good choice.
   I'd like to ask for your confirmation.If you stick to your ideas, I will move this feature to dubbo-spi-extensions. Thanks for your advice.


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[GitHub] [dubbo] 24kpure commented on pull request #8758: add peakEwmaLoadBalance

Posted by GitBox <gi...@apache.org>.
24kpure commented on pull request #8758:
URL: https://github.com/apache/dubbo/pull/8758#issuecomment-920008920


   I moved this feature to [dubbo-spi-extensions](https://github.com/apache/dubbo-spi-extensions/pull/68)


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[GitHub] [dubbo] 24kpure closed pull request #8758: add peakEwmaLoadBalance

Posted by GitBox <gi...@apache.org>.
24kpure closed pull request #8758:
URL: https://github.com/apache/dubbo/pull/8758


   


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[GitHub] [dubbo] codecov-commenter edited a comment on pull request #8758: add peakEwmaLoadBalance

Posted by GitBox <gi...@apache.org>.
codecov-commenter edited a comment on pull request #8758:
URL: https://github.com/apache/dubbo/pull/8758#issuecomment-916312106


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   > Merging [#8758](https://codecov.io/gh/apache/dubbo/pull/8758?src=pr&el=desc&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=The+Apache+Software+Foundation) (7b41f07) into [3.0](https://codecov.io/gh/apache/dubbo/commit/1b100f84cb51a590c865e2d28d159b4d4c203409?el=desc&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=The+Apache+Software+Foundation) (1b100f8) will **increase** coverage by `0.06%`.
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   [![Impacted file tree graph](https://codecov.io/gh/apache/dubbo/pull/8758/graphs/tree.svg?width=650&height=150&src=pr&token=VnEIkiFQT0&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=The+Apache+Software+Foundation)](https://codecov.io/gh/apache/dubbo/pull/8758?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=The+Apache+Software+Foundation)
   
   ```diff
   @@             Coverage Diff              @@
   ##                3.0    #8758      +/-   ##
   ============================================
   + Coverage     63.70%   63.76%   +0.06%     
   + Complexity      312      311       -1     
   ============================================
     Files          1145     1146       +1     
     Lines         48188    48235      +47     
     Branches       7255     7261       +6     
   ============================================
   + Hits          30699    30758      +59     
   + Misses        14123    14116       -7     
   + Partials       3366     3361       -5     
   ```
   
   
   | [Impacted Files](https://codecov.io/gh/apache/dubbo/pull/8758?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=The+Apache+Software+Foundation) | Coverage Δ | |
   |---|---|---|
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   | [...ubbo/registry/client/AbstractServiceDiscovery.java](https://codecov.io/gh/apache/dubbo/pull/8758/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=The+Apache+Software+Foundation#diff-ZHViYm8tcmVnaXN0cnkvZHViYm8tcmVnaXN0cnktYXBpL3NyYy9tYWluL2phdmEvb3JnL2FwYWNoZS9kdWJiby9yZWdpc3RyeS9jbGllbnQvQWJzdHJhY3RTZXJ2aWNlRGlzY292ZXJ5LmphdmE=) | `87.50% <0.00%> (-12.50%)` | :arrow_down: |
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