答复: What is the reason that DataNode should configured the http and streamer port with a number under 1024 in secure mode?

17日 3:41 收件人: hdfs-dev@hadoop.apache.org 主题: Re: What is the reason that DataNode should configured the http and streamer port with a number under 1024 in secure mode? Hi Xiaohan, You're right that if a malicious user can get a fake DN to register with the NN then the low ports don't mat

What is the reason that DataNode should configured the http and streamer port with a number under 1024 in secure mode?

Hi, guys. Now our cluster is moving to security mode. We find many difference with the non-security, one is the starting of datanode. And I am not sure how it works, so I send the email here to ask. Secure mode must use jsvc liking tools to start datanode because it allows the datanode listenin

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In our production environment. We encount a problem about the performance of NameNode. We configure the sharestorge of NameNode with bookkeeper. And our version of hadoop is 2.0.1, bk is 4.1.0. The problem is: When the hdfs system has run for a while(2-3 days), we found the performance descreas