many parameters from ambari gui are diff from json why?

[#1]

hi all

in the Amabri GUI we have a lot of parameters that actually have different name from the json file (we generate json file from blueprint )

as the following example:

DataNode failed disk tolerance - appears as dfs.datanode.failed.volumes.tolerated in ouput json

DataNode maximum Java heap size - appears as dtnode_heapsiz in ouput json

DataNode max data transfer threads - appears as dfs.datanode.max.transfer.threads in ouput json

any idea if we can find some table that show the parameters from amabri and the equivalent parameters from json ?

or any other advice ?

[#2 · Accepted solution]

Hi @uri ben-ari,

You can find the display-names and the property names in the xml configs like hdfs-site, hadoop-env.xml, core-site.xml, etc.

https://github.com/apache/ambari/blob/cc412e66156d5a887a725015537dcb75b0caf986/ambari-server/src/mai...

https://github.com/apache/ambari/blob/cc412e66156d5a887a725015537dcb75b0caf986/ambari-server/src/mai...

for example:

 <property>    
    <name>dfs.datanode.max.transfer.threads</name>    
    <value>1024</value>    
    <description>
    Specifies the maximum number of threads to use for transferring data in and out of the datanode.
    </description>
    <display-name>DataNode max data transfer threads</display-name>
    <value-attributes>
      <type>int</type>      
        <minimum>0</minimum>      
        <maximum>48000</maximum>    
    </value-attributes>    
    <on-ambari-upgrade add="true"/>
</property>

If you can't find something under the common-services then go the appropriate stack directory:

ambari-server/src/main/resources/stacks/<STACK>/<STACK_VERSION>/services/<SERVICE_NAME>/configuration