Closes #4. DataNodes are launched via SimulatedDataNodes, which uses …

…MiniDFSCluster to launch many DataNodes in the same JVM. Additionally, SimulatedFSDataset is used to avoid the requirement of writing sparse files to the disk - all block metadata is now stored in-memory.

NOTICE

@@ -3,3 +3,230 @@ All Rights Reserved.
 
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README.md

@@ -163,10 +163,8 @@ First launch the infrastructure application to begin the startup of the internal
     -conf_path my-hadoop-conf
     -fs_image_dir hdfs:///fsimage
     -block_list_path hdfs:///dyno/blocks
-    -datanode_layout_version -56
 ```
-This demonstrates the required arguments. `-datanode_layout_version` is necessary to determine how the block
-files should be laid out on the DataNodes that are launched.
+This demonstrates the required arguments. You can run this with the `-help` flag to see further usage information.
 
 The client will track the Dyno-NN's startup progress and how many Dyno-DNs it considers live. It will notify
 via logging when the Dyno-NN has exited safemode and is ready for use.
@@ -200,11 +198,10 @@ launch an integrated application with the same parameters as were used above, th
     -conf_path my-hadoop-conf
     -fs_image_dir hdfs:///fsimage
     -block_list_path hdfs:///dyno/blocks
-    -datanode_layout_version -56
     -workload_replay_enable
     -workload_input_path hdfs:///dyno/audit_logs/
     -workload_threads_per_mapper 50
     -workload_start_delay 5m
 ```
 When run in this way, the client will automatically handle tearing down the Dyno-HDFS cluster once the
-workload has completed.
+workload has completed. To see the full list of supported parameters, run this with the `-help` flag.

build.gradle

@@ -23,6 +23,7 @@ ext.deps = [
     'yarn-common': "org.apache.hadoop:hadoop-yarn-common:${hadoopVersion}",
     'mapreduce-client-core': "org.apache.hadoop:hadoop-mapreduce-client-core:${hadoopVersion}",
     minicluster: "org.apache.hadoop:hadoop-minicluster:${hadoopVersion}",
+    'hdfs-test': "org.apache.hadoop:hadoop-hdfs:${hadoopVersion}:tests",
   ]
 ]
 

dynamometer-infra/build.gradle

@@ -9,6 +9,7 @@ dependencies {
   compile deps.hadoop.'yarn-api'
   compile deps.hadoop.'yarn-client'
   compile deps.hadoop.'yarn-common'
+  compile deps.hadoop.'hdfs-test'
   compile project(':dynamometer-workload')
 
   testCompile project(path: ':dynamometer-workload', configuration: 'testArtifacts')

dynamometer-infra/src/main/bash/create-slim-hadoop-tar.sh

@@ -27,7 +27,7 @@ hadoopShare="$baseDir/share/hadoop"
 # Remove unnecessary files
 rm -rf ${baseDir}/share/doc ${hadoopShare}/mapreduce ${hadoopShare}/yarn \
        ${hadoopShare}/kms ${hadoopShare}/tools ${hadoopShare}/httpfs \
-       ${hadoopShare}/*/sources ${hadoopShare}/*/jdiff ${hadoopShare}/*/*-tests.jar
+       ${hadoopShare}/*/sources ${hadoopShare}/*/jdiff
 
 tar czf "$hadoopTarTmp.tar.gz" -C "$hadoopTarTmp" .
 rm -rf "$hadoopTarTmp"