https://community.cloudera.com/t5/Archives-of-Support-Questions/HDFS-capacity/m-p/132462#M23180 <P><A rel="user" href="https://community.cloudera.com/users/3035/prakash6k.html" nodeid="3035">@Ram</A> Note that disks are required for NN also. See post related to sizing of NN. <A href="https://community.hortonworks.com/questions/1692/any-recommendation-on-how-to-partition-disk-space.html#answer-1762" target="_blank">https://community.hortonworks.com/questions/1692/any-recommendation-on-how-to-partition-disk-space.html#answer-1762</A></P> Tue, 22 Mar 2016 23:39:11 GMT drice1 2016-03-22T23:39:11Z https://community.cloudera.com/t5/Archives-of-Support-Questions/HDFS-capacity/m-p/132458#M23176 <P>our HDFS cluster size is 16 TB. have 3 data nodes and 1 name node.</P><P>1.how to find out the storage size alloted for 3 data nodes ?</P><P>2. Does name node uses only RAM memory ? how to find its capacity as well</P> Thu, 17 Mar 2016 14:27:01 GMT https://community.cloudera.com/t5/Archives-of-Support-Questions/HDFS-capacity/m-p/132458#M23176 Aswanth11 2016-03-17T14:27:01Z https://community.cloudera.com/t5/Archives-of-Support-Questions/HDFS-capacity/m-p/132459#M23177 <P>You can check data nodes hdfs configured capacity by</P><P>1. Going into namenode UI <A href="http://namenodeIp:50070/dfshealth.html#tab-datanode" target="_blank">http://namenodeIp:50070/dfshealth.html#tab-datanode</A></P><P>2. from command line use hadoop dfsadmin -report</P><P><A href="https://community.cloudera.com/legacyfs/online/attachments/2861-namenode.png">namenode.png</A></P> Thu, 17 Mar 2016 16:51:21 GMT https://community.cloudera.com/t5/Archives-of-Support-Questions/HDFS-capacity/m-p/132459#M23177 chennuri_gouris 2016-03-17T16:51:21Z https://community.cloudera.com/t5/Archives-of-Support-Questions/HDFS-capacity/m-p/132460#M23178 <P>Namenode ram capacity can be found in namenode ui only</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="2865-heapmemmory.png" style="width: 1304px;"><img src="https://community.cloudera.com/t5/image/serverpage/image-id/22244iD25B7C35A415D553/image-size/medium?v=v2&amp;px=400" role="button" title="2865-heapmemmory.png" alt="2865-heapmemmory.png" /></span></P> Mon, 19 Aug 2019 09:17:57 GMT https://community.cloudera.com/t5/Archives-of-Support-Questions/HDFS-capacity/m-p/132460#M23178 chennuri_gouris 2019-08-19T09:17:57Z https://community.cloudera.com/t5/Archives-of-Support-Questions/HDFS-capacity/m-p/132461#M23179 <P>Thanks much. Name node uses only RAM memory?..no space is required as such data node ?</P> Fri, 18 Mar 2016 16:50:10 GMT https://community.cloudera.com/t5/Archives-of-Support-Questions/HDFS-capacity/m-p/132461#M23179 Aswanth11 2016-03-18T16:50:10Z https://community.cloudera.com/t5/Archives-of-Support-Questions/HDFS-capacity/m-p/132462#M23180 <P><A rel="user" href="https://community.cloudera.com/users/3035/prakash6k.html" nodeid="3035">@Ram</A> Note that disks are required for NN also. See post related to sizing of NN. <A href="https://community.hortonworks.com/questions/1692/any-recommendation-on-how-to-partition-disk-space.html#answer-1762" target="_blank">https://community.hortonworks.com/questions/1692/any-recommendation-on-how-to-partition-disk-space.html#answer-1762</A></P> Tue, 22 Mar 2016 23:39:11 GMT https://community.cloudera.com/t5/Archives-of-Support-Questions/HDFS-capacity/m-p/132462#M23180 drice1 2016-03-22T23:39:11Z