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https://issues.apache.org/jira/browse/ZOOKEEPER-3437?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael Han reassigned ZOOKEEPER-3437:
--------------------------------------

    Assignee: Jie Huang

> Improve sync throttling on a learner master
> -------------------------------------------
>
>                 Key: ZOOKEEPER-3437
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-3437
>             Project: ZooKeeper
>          Issue Type: Improvement
>          Components: quorum
>    Affects Versions: 3.6.0
>            Reporter: Jie Huang
>            Assignee: Jie Huang
>            Priority: Minor
>              Labels: pull-request-available
>             Fix For: 3.6.0
>
>          Time Spent: 2h 20m
>  Remaining Estimate: 0h
>
> As described in ZOOKEEPER-1928, a leader can become overloaded if it sends 
> too many snapshots concurrently during sync time.  Sending too many diffs at 
> the same time can also cause the overloading issue. 
> In this JIRA, we will:
>  # add diff sync throttling in addition to snap sync throttling
>  # extend the protection to followers that serve observers
>  # improve the counting of concurrent snap syncs/diff syncs to avoid double 
> counting or missing counting



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