GHC Hadoop cluster information
Status: all students registered for 10-605 should have accounts on these machines --Wcohen (talk) 11:18, 11 February 2014 (EST)
Anyone can log into these machines with their Andrew account. Registered 10-605 students will also have a HDFS home directory. To use Hadoop you need a small amount of setup: here's a working .bashrc file. [Your default shell may or may not be bash - that's just what I use - W].
export PATH=$PATH:/usr/local/hadoop/bin
export JAVA_HOME=/usr/lib/jvm/jre-sun
export CLASSPATH=`ls -1 /usr/local/hadoop/*.jar|perl -ne 'do{chop;print $sep,$_;$sep=":";}'`
We recommend running some simple job very soon to verify your setup (and also make sure that the permissions and access for your account are set properly). For instance, to copy a sharded version of the rcv1 data from William's HDFS account to yours:
hadoop jar /usr/local/hadoop/contrib/streaming/hadoop-streaming-1.0.1.jar -mapper cat -reducer cat -numReduceTasks 10 -input /user/wcohen/rcv1/small/unsharded -output tmp-output
FQDNs are ghc{01..81}.ghc.andrew.cmu.edu. There will be a user directory for you already under your andrew id.
The NameNode and Map/Reduce Admin. URLs:
- http://ghc81.ghc.andrew.cmu.edu:50070/dfshealth.jsp
- http://ghc81.ghc.andrew.cmu.edu:50030/jobtracker.jsp
Specs:
- 25 nodes have 12 Intel Xeon cores @ 3.20GHZ, 12288KB cache. 12GB RAM.
- 56 nodes have 4 Intel Xeon cores @ 2.67GHz, with 8192KB cache. Also 12GB RAM.
