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Posted to commits@pulsar.apache.org by GitBox <gi...@apache.org> on 2018/12/12 11:10:26 UTC

[GitHub] cbornet opened a new pull request #3171: Add bookkeeperClientRegionawarePolicyEnabled and bookkeeperClientReor…

cbornet opened a new pull request #3171: Add bookkeeperClientRegionawarePolicyEnabled and bookkeeperClientReor…
URL: https://github.com/apache/pulsar/pull/3171
 
 
   …derReadSequenceEnabled config parameters
   
   Fix #3119
   
   ### Motivation
   
   This allows to configure region-aware policy and read-reordering so that brokers first read on bookies of their own region.
   
   ### Modifications
   * Added parameters:
   ```
   # Enable region-aware bookie selection policy. BK will chose bookies from
   # different regions and racks when forming a new bookie ensemble
   # If enabled, the value of bookkeeperClientRackawarePolicyEnabled is ignored
   bookkeeperClientRegionawarePolicyEnabled=false
   
   # Enable/disable reordering read sequence on reading entries.
   bookkeeperClientReorderReadSequenceEnabled=false
   ```
   * Fixed bug in `ZkBookieRackAffinityMapping`: the value set to `racksWithHost` by `deserialize() was overriden by the affectation in `setConf()`. The fix just moves the hostname workaround in `setConf()`.
   
   ### Result
   
   Users can enable `bookkeeperClientRegionawarePolicyEnabled` and `bookkeeperClientReorderReadSequenceEnabled` to make brokers read on bookies of their own region
   

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