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Posted to issues@zookeeper.apache.org by "Enrico Olivelli (JIRA)" <ji...@apache.org> on 2019/07/25 19:44:00 UTC

[jira] [Resolved] (ZOOKEEPER-3437) Improve sync throttling on a learner master

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

Enrico Olivelli resolved ZOOKEEPER-3437.
----------------------------------------
    Resolution: Fixed

Committed as f38905e58e4961ae04d876e1855d6ccb372a706b to master branch
thank you Jie !

> 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: 3h 40m
>  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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