Install DataNode Role on NameNode/SNN machine

[#1]

Hi all,

can I install an HDFS datanode role in machine with installed HDFS NameNode or into machine with SecondaryNameNode?

I use CDH 6.3.2

Thanks,

Francesco

[#2]

Hi paras,

is this solution suitable for a production environment? I read some topic that do not recommend it (link below)

https://serverfault.com/questions/763797/hadoop-name-node-and-data-node-on-the-same-machine

https://www.researchgate.net/post/Can_a_Hadoop_name_node_also_double_duty_as_a_data_node

https://www.ibm.com/support/pages/can-biginsights-have-datanode-same-machine-namenode#:~:text=Yes%2C...

Thanks,

Francesco

[#3]

The data node question has been answered, but one tangental comment - you say you are using the Secondary Name Node service. You almost certainly do not want to be using that. You do not get any HA with the SNN. What you probably want is the Standby Namenode. In Cloudera Manager you can enable HA from the HDFS service actions and that will replace your Secondary Name Node with a Standby Name Node.