how can I increase hdfs capacity

Question

How can I increase the configured capacity of my hadoop DFS from the default 50GB to 100GB?

My present setup is hadoop 1.2.1 running on a centOS6 machine with 120GB

Answer 1

Set the location of the hdfs to a partition with more free space. For hadoop-1.2.1 this can be done by setting the hadoop.tmp.dir in hadoop-1.2.1/conf/core-site.xml

   
      fs.default.name
     hdfs://localhost:9000
     
   
    hadoop.tmp.dir
    /home/myUserID/hdfs
    base location for other hdfs directories.
   

Running

df

had said my _home partition was my hard disk, minus 50GB for my /
( _root) partition. The default location for hdfs is /tmp/hadoop-myUserId which is in the / partition. This is where my initial 50GB hdfs size came from.

Creation and confirmation of the partition location of a directory for the hdfs was accomplished by

mkdir ~/hdfs
df -P ~/hdfs | tail -1 | cut -d' ' -f 1

successful implementation was accomplished by

stop-all.sh
start-dfs.sh
hadoop namenode -format
start-all.sh
hadoop dfsadmin -report

which reports the size of the hdfs as the size of my _home partition.

Thank you jtravaglini for the comment/clue.