[jira] [Commented] (ZOOKEEPER-3167) add an API to get total count of recursive sub nodes of one node

["maoling (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/ZOOKEEPER-3167?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16649248#comment-16649248 ] 

maoling commented on ZOOKEEPER-3167:
------------------------------------

[~TyqITstudent]

Zookeeper uses the github workflow.The contributor guide is [here](https://cwiki.apache.org/confluence/display/ZOOKEEPER/HowToContribute])

> add an API to get total count of recursive sub nodes of one node
> ----------------------------------------------------------------
>
>                 Key: ZOOKEEPER-3167
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-3167
>             Project: ZooKeeper
>          Issue Type: New Feature
>    Affects Versions: 3.4.5, 3.5.0
>            Reporter: 田毅群
>            Priority: Minor
>              Labels: patch
>             Fix For: 3.4.5
>
>         Attachments: 0001-add-get-recursive-children-node-api.patch
>
>
> 1. In production environment, there will be always a situation that there are a lot of recursive sub nodes of one node. We need to count total number of it.
> 2. Now, we can only use API getChildren  which returns the List<String> of first level of sub nodes. We need to iterate every sub node to get recursive sub nodes. It will cost a lot of time.
> 3.  In zookeeper server side, it uses Hasp<String, DataNode> to store node.  The key of the map represents the path of the node. We can iterate the map get total number of all levels of sub nodes of one node.



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