MAPREDUCE-6150. Update document of Rumen (Masatake Iwasaki via aw)
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Allen Wittenauer
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@ -264,6 +264,8 @@ Release 2.7.0 - UNRELEASED
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MAPREDUCE-6141. History server leveldb recovery store (jlowe)
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MAPREDUCE-6150. Update document of Rumen (Masatake Iwasaki via aw)
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OPTIMIZATIONS
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MAPREDUCE-6169. MergeQueue should release reference to the current item
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@ -105,6 +105,7 @@
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<item name="Hadoop Streaming" href="hadoop-mapreduce-client/hadoop-mapreduce-client-core/HadoopStreaming.html"/>
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<item name="Hadoop Archives" href="hadoop-mapreduce-client/hadoop-mapreduce-client-core/HadoopArchives.html"/>
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<item name="DistCp" href="hadoop-mapreduce-client/hadoop-mapreduce-client-core/DistCp.html"/>
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<item name="Rumen" href="hadoop-rumen/Rumen.html"/>
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</menu>
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<menu name="MapReduce REST APIs" inherit="top">
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@ -29,9 +29,7 @@ Rumen
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- [Components](#Components)
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- [How to use Rumen?](#How_to_use_Rumen)
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- [Trace Builder](#Trace_Builder)
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- [Example](#Example)
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- [Folder](#Folder)
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- [Examples](#Examples)
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- [Appendix](#Appendix)
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- [Resources](#Resources)
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- [Dependencies](#Dependencies)
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@ -128,18 +126,21 @@ can use the `Folder` utility to fold the current trace to the
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desired length. The remaining part of this section explains these
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utilities in detail.
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> Examples in this section assumes that certain libraries are present
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> in the java CLASSPATH. See <em>Section-3.2</em> for more details.
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Examples in this section assumes that certain libraries are present
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in the java CLASSPATH. See [Dependencies](#Dependencies) for more details.
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$H3 Trace Builder
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`Command:`
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$H4 Command
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java org.apache.hadoop.tools.rumen.TraceBuilder [options] <jobtrace-output> <topology-output> <inputs>
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```
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java org.apache.hadoop.tools.rumen.TraceBuilder [options] <jobtrace-output> <topology-output> <inputs>
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```
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This command invokes the `TraceBuilder` utility of
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*Rumen*. It converts the JobHistory files into a series of JSON
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This command invokes the `TraceBuilder` utility of *Rumen*.
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TraceBuilder converts the JobHistory files into a series of JSON
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objects and writes them into the `<jobtrace-output>`
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file. It also extracts the cluster layout (topology) and writes it in
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the`<topology-output>` file.
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@ -169,7 +170,7 @@ Cluster topology is used as follows :
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* To extrapolate splits information for tasks with missing splits
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details or synthetically generated tasks.
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`Options :`
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$H4 Options
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<table>
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<tr>
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@ -204,33 +205,45 @@ Cluster topology is used as follows :
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$H4 Example
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java org.apache.hadoop.tools.rumen.TraceBuilder file:///home/user/job-trace.json file:///home/user/topology.output file:///home/user/logs/history/done
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*Rumen* expects certain library *JARs* to be present in the *CLASSPATH*.
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One simple way to run Rumen is to use
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`$HADOOP_HOME/bin/hadoop jar` command to run it as example below.
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```
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java org.apache.hadoop.tools.rumen.TraceBuilder \
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file:///tmp/job-trace.json \
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file:///tmp/job-topology.json \
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hdfs:///tmp/hadoop-yarn/staging/history/done_intermediate/testuser
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```
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This will analyze all the jobs in
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`/home/user/logs/history/done` stored on the
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`local` FileSystem and output the jobtraces in
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`/home/user/job-trace.json` along with topology
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information in `/home/user/topology.output`.
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`/tmp/hadoop-yarn/staging/history/done_intermediate/testuser`
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stored on the `HDFS` FileSystem
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and output the jobtraces in `/tmp/job-trace.json`
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along with topology information in `/tmp/job-topology.json`
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stored on the `local` FileSystem.
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$H3 Folder
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`Command`:
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$H4 Command
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java org.apache.hadoop.tools.rumen.Folder [options] [input] [output]
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> Input and output to `Folder` is expected to be a fully
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> qualified FileSystem path. So use file:// to specify
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> files on the `local` FileSystem and hdfs:// to
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> specify files on HDFS.
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```
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java org.apache.hadoop.tools.rumen.Folder [options] [input] [output]
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```
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This command invokes the `Folder` utility of
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*Rumen*. Folding essentially means that the output duration of
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the resulting trace is fixed and job timelines are adjusted
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to respect the final output duration.
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`Options :`
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> Input and output to `Folder` is expected to be a fully
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> qualified FileSystem path. So use `file://` to specify
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> files on the `local` FileSystem and `hdfs://` to
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> specify files on HDFS.
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$H4 Options
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<table>
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<tr>
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@ -335,14 +348,28 @@ to respect the final output duration.
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$H4 Examples
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$H5 Folding an input trace with 10 hours of total runtime to generate an output trace with 1 hour of total runtime
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java org.apache.hadoop.tools.rumen.Folder -output-duration 1h -input-cycle 20m file:///home/user/job-trace.json file:///home/user/job-trace-1hr.json
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```
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java org.apache.hadoop.tools.rumen.Folder \
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-output-duration 1h \
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-input-cycle 20m \
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file:///tmp/job-trace.json \
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file:///tmp/job-trace-1hr.json
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```
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If the folded jobs are out of order then the command will bail out.
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$H5 Folding an input trace with 10 hours of total runtime to generate an output trace with 1 hour of total runtime and tolerate some skewness
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java org.apache.hadoop.tools.rumen.Folder -output-duration 1h -input-cycle 20m -allow-missorting -skew-buffer-length 100 file:///home/user/job-trace.json file:///home/user/job-trace-1hr.json
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```
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java org.apache.hadoop.tools.rumen.Folder \
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-output-duration 1h \
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-input-cycle 20m \
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-allow-missorting \
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-skew-buffer-length 100 \
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file:///tmp/job-trace.json \
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file:///tmp/job-trace-1hr.json
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```
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If the folded jobs are out of order, then atmost
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100 jobs will be de-skewed. If the 101<sup>st</sup> job is
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@ -350,23 +377,37 @@ If the folded jobs are out of order, then atmost
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$H5 Folding an input trace with 10 hours of total runtime to generate an output trace with 1 hour of total runtime in debug mode
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java org.apache.hadoop.tools.rumen.Folder -output-duration 1h -input-cycle 20m -debug -temp-directory file:///tmp/debug file:///home/user/job-trace.json file:///home/user/job-trace-1hr.json
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```
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java org.apache.hadoop.tools.rumen.Folder \
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-output-duration 1h \
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-input-cycle 20m \
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-debug -temp-directory file:///tmp/debug \
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file:///tmp/job-trace.json \
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file:///tmp/job-trace-1hr.json
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```
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This will fold the 10hr job-trace file
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`file:///home/user/job-trace.json` to finish within 1hr
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`file:///tmp/job-trace.json` to finish within 1hr
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and use `file:///tmp/debug` as the temporary directory.
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The intermediate files in the temporary directory will not be cleaned
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up.
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$H5 Folding an input trace with 10 hours of total runtime to generate an output trace with 1 hour of total runtime with custom concentration.
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java org.apache.hadoop.tools.rumen.Folder -output-duration 1h -input-cycle 20m -concentration 2 file:///home/user/job-trace.json file:///home/user/job-trace-1hr.json</source>
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```
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java org.apache.hadoop.tools.rumen.Folder \
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-output-duration 1h \
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-input-cycle 20m \
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-concentration 2 \
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file:///tmp/job-trace.json \
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file:///tmp/job-trace-1hr.json
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```
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This will fold the 10hr job-trace file
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`file:///home/user/job-trace.json` to finish within 1hr
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with concentration of 2. `Example-2.3.2` will retain 10%
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of the jobs. With *concentration* as 2, 20% of the total input
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jobs will be retained.
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`file:///tmp/job-trace.json` to finish within 1hr
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with concentration of 2.
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If the 10h job-trace is folded to 1h, it retains 10% of the jobs by default.
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With *concentration* as 2, 20% of the total input jobs will be retained.
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Appendix
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@ -377,21 +418,21 @@ $H3 Resources
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<a href="https://issues.apache.org/jira/browse/MAPREDUCE-751">MAPREDUCE-751</a>
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is the main JIRA that introduced *Rumen* to *MapReduce*.
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Look at the MapReduce
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<a href="https://issues.apache.org/jira/browse/MAPREDUCE/component/12313617">
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rumen-component</a>for further details.
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<a href="https://issues.apache.org/jira/browse/MAPREDUCE/component/12313617">rumen-component</a>
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for further details.
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$H3 Dependencies
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*Rumen* expects certain library *JARs* to be present in
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the *CLASSPATH*. The required libraries are
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*Rumen* expects certain library *JARs* to be present in the *CLASSPATH*.
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One simple way to run Rumen is to use
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`hadoop jar` command to run it as example below.
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* `Hadoop MapReduce Tools` (`hadoop-mapred-tools-{hadoop-version}.jar`)
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* `Hadoop Common` (`hadoop-common-{hadoop-version}.jar`)
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* `Apache Commons Logging` (`commons-logging-1.1.1.jar`)
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* `Apache Commons CLI` (`commons-cli-1.2.jar`)
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* `Jackson Mapper` (`jackson-mapper-asl-1.4.2.jar`)
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* `Jackson Core` (`jackson-core-asl-1.4.2.jar`)
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> One simple way to run Rumen is to use '$HADOOP_HOME/bin/hadoop jar'
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> option to run it.
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```
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$HADOOP_HOME/bin/hadoop jar \
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$HADOOP_HOME/share/hadoop/tools/lib/hadoop-rumen-2.5.1.jar \
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org.apache.hadoop.tools.rumen.TraceBuilder \
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file:///tmp/job-trace.json \
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file:///tmp/job-topology.json \
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hdfs:///tmp/hadoop-yarn/staging/history/done_intermediate/testuser
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```
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