Where to set hadoop tmp dir core-site xml or hdfs-site xml

Question

While searching on Internet I found that somewhere it is mentioned that hadoop.tmp.dir be set in hdfs-site.xml and somewhere it is mentioned to specify it in core-site.xml. Which is the right place to put it?

Answer 1

hadoop.tmp.dir (A base for other temporary directories) is property, that need to be set in core-site.xml

Ex:

<name>dfs.namenode.name.dir</name>

<value>file://${hadoop.tmp.dir}/dfs/name</value>

You can use reference of hadoop.tmp.dir in hdfs-site.xml like above

For more core-site.xml and hdfs-site.xml

There're three HDFS properties which contain hadoop.tmp.dir in their values

dfs.name.dir: directory where namenode stores its metadata, with default value ${hadoop.tmp.dir}/dfs/name.

dfs.data.dir: directory where HDFS data blocks are stored, with default value ${hadoop.tmp.dir}/dfs/data.

fs.checkpoint.dir: directory where secondary namenode store its checkpoints, default value is${hadoop.tmp.dir}/dfs/namesecondary