question Hadoop Rack-Awareness is only for datanode servers? in Archives of Support Questions (Read Only) https://community.cloudera.com/t5/Archives-of-Support-Questions/Hadoop-Rack-Awareness-is-only-for-datanode-servers/m-p/203250#M59653 <P>If this is the case,</P><P><STRONG>Rack-A</STRONG></P><P>Master 0 (Ambari)</P><P>Master 1 (NameNode Server 1, NameNodeHA)</P><P><STRONG>Rack-B</STRONG></P><P>Master 2 (NameNode Server 2, NameNodeHA)</P><P>Master 3 (Yarn, etc...)</P><P><STRONG>Rack-C</STRONG></P><P>Slave 1-10 (DataNode 1-10)</P><P><STRONG>Rack-D</STRONG></P><P>Slave 11-20 (DataNodes 11-20)</P><P>Just only set the rack awareness to datanode's racks using by ambari?</P><P>Like this</P><P>/default</P><P>: Master 0, Master 1, Master 2, Master 3</P><P>/Rack-C</P><P>: Slave 1-10</P><P>/Rack-D</P><P>: Slave 11-20</P> Wed, 19 Apr 2017 00:56:40 GMT MindGlass 2017-04-19T00:56:40Z Hadoop Rack-Awareness is only for datanode servers? https://community.cloudera.com/t5/Archives-of-Support-Questions/Hadoop-Rack-Awareness-is-only-for-datanode-servers/m-p/203250#M59653 <P>If this is the case,</P><P><STRONG>Rack-A</STRONG></P><P>Master 0 (Ambari)</P><P>Master 1 (NameNode Server 1, NameNodeHA)</P><P><STRONG>Rack-B</STRONG></P><P>Master 2 (NameNode Server 2, NameNodeHA)</P><P>Master 3 (Yarn, etc...)</P><P><STRONG>Rack-C</STRONG></P><P>Slave 1-10 (DataNode 1-10)</P><P><STRONG>Rack-D</STRONG></P><P>Slave 11-20 (DataNodes 11-20)</P><P>Just only set the rack awareness to datanode's racks using by ambari?</P><P>Like this</P><P>/default</P><P>: Master 0, Master 1, Master 2, Master 3</P><P>/Rack-C</P><P>: Slave 1-10</P><P>/Rack-D</P><P>: Slave 11-20</P> Wed, 19 Apr 2017 00:56:40 GMT https://community.cloudera.com/t5/Archives-of-Support-Questions/Hadoop-Rack-Awareness-is-only-for-datanode-servers/m-p/203250#M59653 MindGlass 2017-04-19T00:56:40Z Re: Hadoop Rack-Awareness is only for datanode servers? https://community.cloudera.com/t5/Archives-of-Support-Questions/Hadoop-Rack-Awareness-is-only-for-datanode-servers/m-p/203251#M59654 <P>Hi <A rel="user" href="https://community.cloudera.com/users/11679/peter1.html" nodeid="11679">@Peter Kim</A> Rack Awareness is only used by HDFS to ensure it accurately places replicas of data off-rack, therefore it only needs to have the datanodes listed.</P><P>Hope that helps!</P> Mon, 24 Apr 2017 15:35:57 GMT https://community.cloudera.com/t5/Archives-of-Support-Questions/Hadoop-Rack-Awareness-is-only-for-datanode-servers/m-p/203251#M59654 drussell 2017-04-24T15:35:57Z