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https://issues.apache.org/jira/browse/ZOOKEEPER-2260?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15056777#comment-15056777
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ASF GitHub Bot commented on ZOOKEEPER-2260:
-------------------------------------------

GitHub user mprimi opened a pull request:

    https://github.com/apache/zookeeper/pull/50

    ZOOKEEPER-2260: Paginated getChildren call

    Motivation
     - Allow listing children that normally would exceed the buffer limit
     - Get stat for children in the same call as the list
    
    Modifications
    - Implemetation of DataTree#getPaginatedChildren
    - Added the call to the zk client
    - Handle the call in the FinalRequestProcessor
    - Added PathWithStat, GetChildrenPaginatedRequest and 
GetChildrenPaginatedResponse to the protos
    - Added tests for pagination and watch

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/mprimi/zookeeper ZOOKEEPER-2260

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/zookeeper/pull/50.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #50
    
----
commit cfc4e2f9ea8582456e8de120b874301cfd7196b9
Author: Marco Primi <mpr...@apple.com>
Date:   2015-12-14T21:41:28Z

    ZOOKEEPER-2260: Paginated getChildren call
    
    Motivation
    Being able to get children with pagination.
    Two main benefits:
     - Allow listing children that normally would exceed the buffer limit
     - Get stat for children in the same call as the list
    
    Modifications
    - Implemetation of DataTree#getPaginatedChildren
    - Added the call to the zk client
    - Handle the call in the FinalRequestProcessor
    - Added PathWithStat, GetChildrenPaginatedRequest and 
GetChildrenPaginatedResponse to the protos
    - Added tests for pagination and watch

----


> Paginated getChildren call
> --------------------------
>
>                 Key: ZOOKEEPER-2260
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2260
>             Project: ZooKeeper
>          Issue Type: New Feature
>    Affects Versions: 3.4.5, 3.4.6, 3.5.0, 4.0.0
>            Reporter: Marco P.
>            Priority: Minor
>              Labels: api, features
>             Fix For: 4.0.0
>
>         Attachments: ZOOKEEPER-2260.patch
>
>
> Add pagination support to the getChildren() call, allowing clients to iterate 
> over children N at the time.
> Motivations for this include:
>   - Getting out of a situation where so many children were created that 
> listing them exceeded the network buffer sizes (making it impossible to 
> recover by deleting)[1]
>  - More efficient traversal of nodes with large number of children [2]
> I do have a patch (for 3.4.6) we've been using successfully for a while, but 
> I suspect much more work is needed for this to be accepted. 
> [1] https://issues.apache.org/jira/browse/ZOOKEEPER-272
> [2] https://issues.apache.org/jira/browse/ZOOKEEPER-282



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