Andrew Musselman and Suneel Marthi, Thank you two and I really appreciate it! Wish you two very successful in your company!
I was wondering is there any documentation or tutorial which can go through how the Hadoop is written, not like the definition guide one. For example, from the very beginning when we run start-all.sh to setup Hadoop till the Hadoop is ready to run MapReduce jobs. is it possible to debug the every step from the very beginning to the end? When you have a Java program, you can know exactly every step by debug it in Java IDE. Is it possible to debug every step in Hadoop from start-all.sh, or even format namenode, till the end of some Mapreduce job? Any suggestion or guidance will be deeply appreciated. On Wed, Jan 29, 2014 at 6:16 PM, Andrew Musselman < andrew.mussel...@gmail.com> wrote: > Those aliases are defined in src/conf/driver.classes.default.props. > > That language is shell-scripting, e.g. bash. > > > On Wed, Jan 29, 2014 at 2:15 PM, qiaoresearcher <qiaoresearc...@gmail.com > >wrote: > > > when run the command like: > > > > mahout seq2sparse -i inputfile -o outputfile > > > > where is the command seq2sparse defined? how does the system know to > > actually run the SparseFileFromSequenceFile class? > > > > what is the language used in the command Mahout such as the language > given > > below: > > > > ======================================== > > > > THIS="$0" > > while [ -h "$THIS" ]; do > > ls=`ls -ld "$THIS"` > > link=`expr "$ls" : '.*-> \(.*\)$'` > > if expr "$link" : '.*/.*' > /dev/null; then > > THIS="$link" > > else > > THIS=`dirname "$THIS"`/"$link" > > fi > > done > > > > IS_CORE=0 > > if [ "$1" == "-core" ] ; then > > IS_CORE=1 > > shift > > fi > > > > if [ "$MAHOUT_CORE" != "" ]; then > > IS_CORE=1 > > fi > > > > # some directories > > THIS_DIR=`dirname "$THIS"` > > MAHOUT_HOME=`cd "$THIS_DIR/.." ; pwd` > > > > # some Java parameters > > if [ "$MAHOUT_JAVA_HOME" != "" ]; then > > #echo "run java in $MAHOUT_JAVA_HOME" > > JAVA_HOME=$MAHOUT_JAVA_HOME > > fi > > >
