Current Hama requires JRE 1.6 or higher and ssh to be set up between nodes in the cluster:
Note: Appending releases of Hadoop, e.G. 0.20.3, may not work because of changes in the RPC Protocol!
You can download Hadoop-0.20.2 here:
http://www.apache.org/dyn/closer.cgi/hadoop/core/
You can download Hama here:
http://www.apache.org/dyn/closer.cgi/incubator/hama
We recommend the installation guide of Michael Noll:
Single Node: http://www.michael-noll.com/tutorials/running-hadoop-on-ubuntu-linux-single-node-cluster/
Multi Node: http://www.michael-noll.com/tutorials/running-hadoop-on-ubuntu-linux-multi-node-cluster/
Untar the files to your destination of choice:
tar -xzf hama-0.3.0-incubating.tar.gz |
Don't forget to chown the directory as the same user you configured Hadoop in the step before.
The $HAMA_HOME/bin directory contains some script used to start up the Hama daemons.
start-bspd.sh - Starts all Hama daemons, the BSPMaster, GroomServers and Zookeeper.
Note: You have to start Hama with the same user which is configured for Hadoop.
The $HAMA_HOME/conf directory contains some configuration files for Hama. These are:
hama-env.sh - This file contains some environment variable settings used by Hama. You can use these to affect some aspects of Hama daemon behavior, such as where log files are stored, the maximum amount of heap used etc. The only variable you should need to change in this file is JAVA_HOME, which specifies the path to the Java 1.5.x installation used by Hama.groomservers - This file lists the hosts, one per line, where the GroomServer daemons will run. By default this contains the single entry localhosthama-default.xml - This file contains generic default settings for Hama daemons. Do not modify this file.hama-site.xml - This file contains site specific settings for all Hama daemons and BSP jobs. This file is empty by default. Settings in this file override those in hama-default.xml. This file should contain settings that must be respected by all servers and clients in a Hama installation.
This section describes how to get started by setting up a Hama cluster.
Just like Hadoop, we distinct between three modes:
This mode is the default mode if you download Hama (>= 0.3.0) and install it. When submitting a job it will run a local multithreaded BSP Engine on your server. It can be configured via the "bsp.master.address" property to "local". You can adjust the number of threads used in this utility by setting the "bsp.local.tasks.maximum" property. See the Settings step how and where to configure this.
This mode is when you just have a single server and want to launch all the deamon processes (BSPMaster, Groom and Zookeeper). It can be configured when you set the "bsp.master.address" to a host address, e.G. "localhost" and put the same address into the "groomservers" file in the configuration directory. As stated it will run a BSPMaster, a Groom and a Zookeeper on your machine.
This mode is just like the "Pseudo Distributed Mode", but you have multiple machines, which are mapped in the "groomservers" file.
bsp.master.address to the BSPMaster's intended host:port. Set the variable fs.default.name to the HDFS Namenode's intended host:port.
An example of a hama-site.xml file:
<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
<configuration>
<property>
<name>bsp.master.address</name>
<value>host1.mydomain.com:40000</value>
<description>The address of the bsp master server. Either the
literal string "local" or a host:port for distributed mode
</description>
</property>
<property>
<name>fs.default.name</name>
<value>hdfs://host1.mydomain.com:9000/</value>
<description>
The name of the default file system. Either the literal string
"local" or a host:port for HDFS.
</description>
</property>
<property>
<name>hama.zookeeper.quorum</name>
<value>host1.mydomain.com,host2.mydomain.com</value>
<description>Comma separated list of servers in the ZooKeeper Quorum.
For example, "host1.mydomain.com,host2.mydomain.com,host3.mydomain.com".
By default this is set to localhost for local and pseudo-distributed modes
of operation. For a fully-distributed setup, this should be set to a full
list of ZooKeeper quorum servers. If HAMA_MANAGES_ZK is set in hama-env.sh
this is the list of servers which we will start/stop zookeeper on.
</description>
</property>
</configuration>
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If you are managing your own ZooKeeper, you have to specify the port number as below:
<property>
<name>hama.zookeeper.property.clientPort</name>
<value>2181</value>
</property>
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Run the command:
% $HAMA_HOME/bin/start-bspd.sh |
This will startup a BSPMaster, GroomServers and Zookeeper on your machine.
Run the command:
% $HAMA_HOME/bin/stop-bspd.sh |
to stop all the daemons running on your cluster.
Run the command:
% $HAMA_HOME/bin/hama jar hama-examples-0.x.0-incubating.jar |
It will then offer you some examples to choose. Refer to our Examples site if you have additional questions how to use them.
The web UI provides information about BSP job statistics of the Hama cluster, running/completed/failed jobs.
By default, it’s available at http://localhost:40013