org.apache.mahout.graph.linkanalysis
Class PageRankJob
java.lang.Object
org.apache.hadoop.conf.Configured
org.apache.mahout.common.AbstractJob
org.apache.mahout.graph.linkanalysis.PageRankJob
- All Implemented Interfaces:
- org.apache.hadoop.conf.Configurable, org.apache.hadoop.util.Tool
public class PageRankJob
- extends AbstractJob
Distributed computation of the PageRank a directed graph
This job outputs text files with a vertex id and its pagerank per line.
Command line arguments specific to this class are:
- --output=(path): output path
- --vertices=(path): file containing the list of vertices of the graph (one per line)
- --edges=(path): directory containing edges of the graph (pair of vertex ids per line in textformat)
- --numIterations=(Integer): number of numIterations, default: 10
- --stayingProbability=(Double): probability not to teleport to a random vertex, default: 0.85
General command line options are documented in AbstractJob
.
Note that because of how Hadoop parses arguments, all "-D" arguments must appear before all other arguments.
Methods inherited from class org.apache.mahout.common.AbstractJob |
addFlag, addInputOption, addOption, addOption, addOption, addOption, addOutputOption, buildOption, getAnalyzerClassFromOption, getCLIOption, getCombinedTempPath, getGroup, getInputPath, getOption, getOption, getOutputPath, getOutputPath, getTempPath, getTempPath, hasOption, keyFor, maybePut, parseArguments, parseDirectories, prepareJob, prepareJob, prepareJob, setS3SafeCombinedInputPath, shouldRunNextPhase |
Methods inherited from class org.apache.hadoop.conf.Configured |
getConf, setConf |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Methods inherited from interface org.apache.hadoop.conf.Configurable |
getConf, setConf |
PageRankJob
public PageRankJob()
main
public static void main(String[] args)
throws Exception
- Throws:
Exception
createDampingVector
protected Vector createDampingVector(int numVertices,
double stayingProbability)
addSpecificOptions
protected void addSpecificOptions()
evaluateSpecificOptions
protected void evaluateSpecificOptions(Map<String,String> parsedArgs)
run
public final int run(String[] args)
throws Exception
- Throws:
Exception
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