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https://issues.apache.org/jira/browse/HDFS-16134?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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JiangHua Zhu resolved HDFS-16134.
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Resolution: Duplicate
> Optimize RPC throughput
> -----------------------
>
> Key: HDFS-16134
> URL: https://issues.apache.org/jira/browse/HDFS-16134
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: JiangHua Zhu
> Assignee: JiangHua Zhu
> Priority: Major
>
> Now RPC has the following phenomena:
> 1. Each RPC has 1 Responder, which is used to return the result, but many
> client requests are directly returned after the handler is processed;
> 2. Call#Connection#responseQueue uses synchronous control every time it is
> used;
> These phenomena will hinder the performance of RPC, we can try to make some
> changes.
> 1. Set multiple responders for each RPC, and the user returns the result;
> 2. After the Handler processing is completed, add the results that need to be
> returned to a queue, and the Responder will process the queue data;
> 3. Add an identifier similar to sequenceId to ensure the order of return;
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