From Source Code (Github)

These instructions assume you are using Linux, MacOSX, or Cygwin (on Windows).

1. Create a git clone of the H₂O repository.

git clone https://github.com/0xdata/h2o.git

2. Build H₂O from source. You must have Java JDK 1.6 or higher. After the build finishes, some JUnit tests will run automatically.

$ cd h2o
$ make

(Output below)

PROJECT_VERSION is 99.99.99.99999
make build PROJECT_VERSION=99.99.99.99999
make build_h2o PROJECT_VERSION=99.99.99.99999
(export PROJECT_VERSION=99.99.99.99999; ./build.sh doc)
cleaning...
 - wiping tmp...
building classes...
warning: [options] bootstrap class path not set in conjunction with -source 1.6
Note: Some input files use unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
1 warning
building initializer...
~/Documents/h2o/lib ~/Documents/h2o
~/Documents/h2o
creating jar file... target/h2o.jar
copying jar file... target/h2o.jar to target/h2o-10.42.01-072913.jar
creating src jar file... target/h2o-sources.jar
copying jar file... target/h2o-sources.jar to target/h2o-sources-10.42.01-072913.jar
creating javadoc files...
make -C hadoop build PROJECT_VERSION=99.99.99.99999
rm -fr classes target
mkdir classes
mkdir target
make build_inner HADOOP_VERSION=mapr2.1.3
mkdir classes/mapr2.1.3
javac -source 1.6 -target 1.6 -sourcepath src/main/java -classpath
"../lib/log4j/log4j-1.2.15.jar:../target/h2o.jar:../lib/hadoop/mapr2.1.3/hadoop-0.20.2-dev-core.jar"
-d classes/mapr2.1.3 src/main/java/water/hadoop/*.java
warning: [options] bootstrap class path not set in conjunction with -source 1.6
1 warning
jar cf target/h2odriver_mapr2.1.3.jar -C classes/mapr2.1.3 .
make build_inner HADOOP_VERSION=cdh3
mkdir classes/cdh3
javac -source 1.6 -target 1.6 -sourcepath src/main/java -classpath
"../lib/log4j/log4j-1.2.15.jar:../target/h2o.jar:../lib/hadoop/cdh3/hadoop-core-0.20.2-cdh3u6.jar" -d
classes/cdh3 src/main/java/water/hadoop/*.java
warning: [options] bootstrap class path not set in conjunction with -source 1.6
1 warning
jar cf target/h2odriver_cdh3.jar -C classes/cdh3 .
make build_inner HADOOP_VERSION=cdh4
mkdir classes/cdh4
javac -source 1.6 -target 1.6 -sourcepath src/main/java -classpath
"../lib/log4j/log4j-1.2.15.jar:../target/h2o.jar:../lib/hadoop/cdh4/hadoop-common.jar:../
lib/hadoop/cdh4/hadoop-mapreduce-client-core-2.0.0-cdh4.2.0.jar" -d
classes/cdh4 src/main/java/water/hadoop/*.java
warning: [options] bootstrap class path not set in conjunction with -source 1.6
 ../lib/hadoop/cdh4/hadoop-common.jar(org/apache/hadoop/fs/Path.class):
 warning: Cannot find annotation method 'value()' in type
 'LimitedPrivate': class file for
 org.apache.hadoop.classification.InterfaceAudience not found
Note: src/main/java/water/hadoop/h2odriver.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
2 warnings
jar cf target/h2odriver_cdh4.jar -C classes/cdh4 .
make build_inner HADOOP_VERSION=cdh4_yarn
mkdir classes/cdh4_yarn
javac -source 1.6 -target 1.6 -sourcepath src/main/java -classpath
"../lib/log4j/log4j-1.2.15.jar:../target/h2o.jar:../lib/hadoop/cdh4_yarn/common/
hadoop-common-2.0.0-cdh4.3.0.jar:../lib/hadoop/cdh4_yarn/mapreduce2/hadoop-mapreduce-client-
core-2.0.0-cdh4.3.0.jar" -d
classes/cdh4_yarn src/ main/java/water/hadoop/*.java
warning: [options] bootstrap class path not set in conjunction with -source 1.6
../lib/hadoop/cdh4_yarn/common/hadoop-common-2.0.0-cdh4.3.0.jar(org/apache/hadoop/fs/Path.class):
warning: Cannot find annotation method 'value()' in type
'LimitedPrivate': class file for org.apache.hadoop.classification.InterfaceAudience not found
Note: src/main/java/water/hadoop/h2odriver.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
2 warnings
jar cf target/h2odriver_cdh4_yarn.jar -C classes/cdh4_yarn .
rm -rf ../target/hadoop
mkdir ../target/hadoop
cp README.txt ../target/hadoop
cp target/* ../target/hadoop
make -C R build PROJECT_VERSION=99.99.99.99999
sed 's/SUBST_PROJECT_VERSION/99.99.99.99999/' DESCRIPTION.template > h2o-package/DESCRIPTION
R CMD build h2o-package
* checking for file ‘h2o-package/DESCRIPTION’ ... OK
* preparing ‘h2o’:
* checking DESCRIPTION meta-information ... OK
* checking for LF line-endings in source and make files
* checking for empty or unneeded directories
* building ‘h2o_99.99.99.99999.tar.gz’

mkdir -p ../target/R
mv h2o_99.99.99.99999.tar.gz ../target/R
make -C launcher build PROJECT_VERSION=99.99.99.99999
rm -fr classes
rm -fr target
mkdir classes
mkdir target
javac -source 1.6 -target 1.6 -sourcepath src -d classes src/*.java
warning: [options] bootstrap class path not set in conjunction with -source 1.6
1 warning
jar cmf manifest.txt target/H2OLauncher.jar -C classes .
mkdir -p ../target/launcher
mv target/H2OLauncher.jar ../target/launcher
make package
rm -fr target/h2o-99.99.99.99999
mkdir target/h2o-99.99.99.99999
cp -rp target/R target/h2o-99.99.99.99999
cp -rp target/hadoop target/h2o-99.99.99.99999
cp -p target/h2o.jar target/h2o-99.99.99.99999
cp -p target/h2o-sources.jar target/h2o-99.99.99.99999
(cd target; zip -r h2o-99.99.99.99999.zip h2o-99.99.99.99999)
adding: h2o-99.99.99.99999/ (stored 0%)
adding: h2o-99.99.99.99999/h2o-sources.jar (deflated 3%)
adding: h2o-99.99.99.99999/h2o.jar (deflated 0%)
adding: h2o-99.99.99.99999/hadoop/ (stored 0%)
adding: h2o-99.99.99.99999/hadoop/h2odriver_cdh3.jar (deflated 8%)
adding: h2o-99.99.99.99999/hadoop/h2odriver_cdh4.jar (deflated 8%)
adding: h2o-99.99.99.99999/hadoop/h2odriver_cdh4_yarn.jar (deflated 8%)
adding: h2o-99.99.99.99999/hadoop/h2odriver_mapr2.1.3.jar (deflated 8%)
adding: h2o-99.99.99.99999/hadoop/README.txt (deflated 57%)
adding: h2o-99.99.99.99999/R/ (stored 0%)
adding: h2o-99.99.99.99999/R/h2o_99.99.99.99999.tar.gz (deflated 0%)
rm -fr target/h2o-99.99.99.99999
make build_installer PROJECT_VERSION=99.99.99.99999
make -C installer build PROJECT_VERSION=99.99.99.99999
InstallBuilder not found, skipping creation of windows and mac installer packages.
rm -fr target/h2o-99.99.99.99999-osx-installer.app
rm -f target/h2o-*-windows-installer.exe.dmg

3. The build produces target/h2o.jar. Now run h2o.jar from the command line. Note that Xmx is the amount of memory given to H2O. If your data set is large, increase the number immediately following Xmx from the default of 2. As a rule, the amount of memory given should be about 4 times the size of your data, but no larger than the total memory of your computer.

$ java -Xmx2g -jar target/h2o.jar

(Output below)

04:57:15.900 main      INFO WATER: ----- H2O started -----
04:57:15.901 main      INFO WATER: Build git branch: master
04:57:15.901 main      INFO WATER: Build git hash: 9b956b258f276b5187cecde2be193c6485bd4517
04:57:15.902 main      INFO WATER: Build git describe: 9b956b2
04:57:15.902 main      INFO WATER: Built by: 'tomk'
04:57:15.902 main      INFO WATER: Built on: 'Tue Jul 23 14:13:38 PDT 2013'
04:57:15.902 main      INFO WATER: Java availableProcessors: 8
04:57:15.906 main      INFO WATER: Java heap totalMemory: 0.08 gb
04:57:15.906 main      INFO WATER: Java heap maxMemory: 0.99 gb
04:57:15.918 main      INFO WATER: ICE root: '/tmp'
04:57:15.955 main      WARN WATER: Multiple local IPs detected:
+                                    /172.16.175.1  /192.168.183.1  /192.168.1.28
+                                  Attempting to determine correct address...
+                                  Using /192.168.1.28
04:57:15.997 main      INFO WATER: Internal communication uses port: 54322
+                                  Listening for HTTP and REST traffic on  http://192.168.1.28:54321/
04:57:16.029 main
04:57:16.029 main      INFO WATER: 192.168.1.28:54321, discovery address /236.151.114.91:60567
04:57:16.031 main      INFO WATER: Cloud of size 1 formed [/192.168.1.28:54321]
04:57:16.032 main      INFO WATER: Log dir: '/tmp/h2ologs'

4. Point your web browser to the HTTP URL (http://your-ip-address:54321); H2O will run from there.

Updating H₂O from Github

1. Change directory to H₂O directory created when the git repository was originally cloned.
2. Pull the latest code, and update

$ git pull
$ make