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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (ZOOKEEPER-3437) Improve sync throttling on a learner master
Date Thu, 20 Jun 2019 22:27:00 GMT

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

ASF GitHub Bot updated ZOOKEEPER-3437:
--------------------------------------
    Labels: pull-request-available  (was: )

> 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
>            Priority: Minor
>              Labels: pull-request-available
>             Fix For: 3.6.0
>
>
> 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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