Victory goes to the player who makes the next-to-last mistake
May 28, 2013 Leave a comment
We can execute hadoop commands in hive cli. It is very simple.
Just put an exclamation mark (!) before your hadoop command in hive cli and put a semicolon (;) after your command.
Example:
hive> !hadoop fs –ls / ; drwxr-xr-x - hdfs supergroup 0 2013-03-20 12:44 /app drwxrwxrwx - hdfs supergroup 0 2013-05-23 11:54 /tmp drwxr-xr-x - hdfs supergroup 0 2013-05-08 18:47 /user
Very simple.. 🙂
Filed under BigData World Tagged with Apache Hadoop, BigData, exclamation mark, hadoop, hadoop command, hadoop command in hive, hdfs, hive, hive cli, hive permissions, mapreduce, semicolon
May 28, 2013 2 Comments
By default, hive operations are limited to the superuser. If you are using cdh, then the superuser is hdfs.
The reason for this is because of the permission of hive warehouse directory.
By default the read/permission of this directory is given only to the superuser.
So if we want to use hive from multiple users, change the permission of this directory accordingly.
If you want to make hive usable by all users, then do the following command.
hadoop fs –chmod –R 777 /user/hive/warehouse hadoop fs –chmod –R 777 /tmp
If you group the users in specific groups, then you can do this by giving read/write permission to group only. ie 775
Filed under BigData World Tagged with Apache Hadoop, BigData, chmod, hadoop, hdfs, hive, hive metastore, hive multiuser, hive permissions, hive warehouse, hive-site.xml, mapreduce, multi-user, multiple users, permission issue, shell, software, Superuser, technology, tmp, User Groups
