# About

Hive-ptest is a parallel testing framework for executing the Hive unit tests. If you'd like
to dive into the code, start with org.apache.hive.ptest.RunTests.

# Building

    mvn clean package

# Sizing

We utilize 8 servers for this process and trunk builds complete in 1 hour. Each slave
has 8 physical cores with hyperthreading enabled and 48GB of ram. Each slave is allowed
8 test "threads". I had used more than 8 threads but Zookeeper timed out randomly.

# Configuring

* Create a user such as hiveptest on the master and all slaves.
* Setup passwordless ssh form the master to all slaves.
* Ensure that SSH connection attempts won't fail.

On all slaves add the following to /etc/ssh/sshd_config:

    MaxAuthTries 100
    MaxSessions 100
    MaxStartups 100

# Install git, svn, make, patch, java, ant, and maven

Recent version of git, svn, make, patch, java, ant and maven should be installed. Additionally
environment variables such as MAVEN_OPTS and ANT_OPTS should be configured with large leap sizes:

    $ for item in java maven ant; do echo $item; cat /etc/profile.d/${item}.sh;done
    java
    export JAVA_HOME=$(readlink -f /usr/java/default)
    export PATH=$JAVA_HOME/bin:$PATH
    maven
    export M2_HOME=$(readlink -f /usr/local/apache-maven)
    export PATH=$M2_HOME/bin:$PATH
    export MAVEN_OPTS="-Xmx2g -XX:MaxPermSize=256M"
    ant
    export ANT_HOME=$(readlink -f /usr/local/apache-ant)
    export PATH=$ANT_HOME/bin:$PATH
    export ANT_OPTS="-Xmx1g -XX:MaxPermSize=256m"

# Ensure umask is setup to 0022

    $ cat /etc/profile.d/umask.sh 
    umask 0022

# On all slaves ensure that nproc and nofile are set to high values

# rm /etc/security/limits.d/90-nproc.conf

# cat /etc/security/limits.d/nproc.conf

* soft nproc 32768
* hard nproc 65536

root soft nproc 32768
root hard nproc 65536
# cat /etc/security/limits.d/nofile.conf 

* soft nofile 32768
* hard nofile 32768

root soft nofile 32768
root hard nofile 32768

# If using the Cloud Host Provider:

Ensure the user running the tests has strict host/key checking disabled:

   $ cat ~/.ssh/config
   StrictHostKeyChecking no
   ConnectTimeout 20
   ServerAliveInterval 1

# Configure properties file

See conf/example-apache-trunk.properties

# Execute

    mvn dependency:copy-dependencies
    java -Xms4g -Xmx4g -cp "target/hive-ptest-1.0-classes.jar:target/dependency/*" org.apache.hive.ptest.execution.PTest --properties apache-trunk.properties