Hadoop Quick (Default) Port Reference & Help datanode startup on NTFS/Windows 8

Hadoop Quick (Default) Port Reference

This comes quite handy, e.g., when you need to setup firewall rules.

And here is a post related to the filesystem permission checks that the datanode service performs upon startup.

On my Windows 8 machine, I had to add the following lines to the hdfs-site.xml that comes with hortonworks hdp 1 distribution

 <description>The permissions that should be there on dfs.data.dir
 directories. The datanode will not come up if the permissions are
 different on existing dfs.data.dir directories. If the directories
 don't exist, they will be created with this permission.