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Posted to commits@pulsar.apache.org by gi...@git.apache.org on 2017/09/13 20:55:57 UTC

[GitHub] rdhabalia opened a new pull request #758: Add option to persist unack-msg range to cursor-ledger if range is high

rdhabalia opened a new pull request #758: Add option to persist unack-msg range to cursor-ledger if range is high
URL: https://github.com/apache/incubator-pulsar/pull/758
 
 
   ### Motivation
   
   To address #742, we can solve it by recovering unack-message range while recovering managed-cursor. However, storage of large number of unack-msg range can increase zk footprint size. Therefore, we can store this unack-msg range to bookkeeper instead of ZK if unack-msg range is higher than certain threshold.
   
   ### Modifications
   
   introduce threshold to decide if cursor-state should store in zookeeper or bookkeeper-ledger.
   
   ### Result
   
   Broker can have capability to store cursor-state into bookkeeper-ledger if unack-range is higher than the threshold.
   
 
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