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https://issues.apache.org/jira/browse/GIRAPH-273?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13447414#comment-13447414
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Eli Reisman commented on GIRAPH-273:
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Wanted to add something: rereading the thread here, I think I can address the
HDFS concern from earlier: the NameNode unduly suffers when HDFS is loaded up
with lots of tiny files.
> Aggregators shouldn't use Zookeeper
> -----------------------------------
>
> Key: GIRAPH-273
> URL: https://issues.apache.org/jira/browse/GIRAPH-273
> Project: Giraph
> Issue Type: Improvement
> Reporter: Maja Kabiljo
> Assignee: Maja Kabiljo
>
> We use Zookeeper znodes to transfer aggregated values from workers to master
> and back. Zookeeper is supposed to be used for coordination, and it also has
> a memory limit which prevents users from having aggregators with large value
> objects. These are the reasons why we should implement aggregators gathering
> and distribution in a different way.
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