vRODBC setup for DistributedR and Vertica database cluster

Pre-requisites

• Make sure DistributedR is setup as per the steps described in previous guide.
• Check whether vertica server is up and accessible. vsql -h 10.0.0.3 -U dbadmin -d test

In this particular case there is vertica database server installed with Vertica-R-Udtf setup. The R runtime is being provided from within vertica hence the environment variables changed as below.

Reference: http://www.vertica.com/wp-content/uploads/2014/06/vRODBC-Installation-Guide.pdf

1. Add the following variables in the .bashrc of root for library linking and source it.

export R_HOME=/opt/vertica/R
export DR_HOME=/opt/hp/distributedR
export LD_LIBRARY_PATH=/usr/local/lib/:/opt/vertica/lib64/:/usr/lib/jvm/java-1.6.0-openjdk-1.6.0.34.x86_64/jre/lib/amd64/server:$DR_HOME/lib:$DR_HOME/third_party/lib:$DR_HOME/third_party/lib/atomicio/:$LD_LIBRARY_PATH

2. Install using the  DistributedR-master/third_party/unixODBC-2.3.1.tar.gz

$ tar -xvzf unixODBC-2.3.1.tar.gz
$ cd unixODBC-2.3.1
$ ./configure && make
$ make install

3. Install the vRODBC available in the DistributedR-master/ source folder

$ R CMD INSTALL vRODBC/

4. Create the config files for vRODBC

# Create a directory for the config files
$ mkdir /home/dbadmin/vRODBC/

5. Add the following content to this folder in vertica.ini

 [Driver]
 DriverManagerEncoding = UTF-16
 ODBCInstLib = /usr/local/lib/libodbcinst.so
 ErrorMessagesPath = /opt/vertica/lib64
 LogLevel = 0
 LogPath = /tmp

6. Add the following content to this folder in odbc.ini

 [Test]
 Description = vRODBC test client
 Driver = /opt/vertica/lib64/libverticaodbc.so
 Database = test
 Servername = 10.0.0.3
 UserName = dbadmin
 Password = test
 Port = 5433
 ConnSettings =
 Locale = en_US

7. Use the following environment variables in the users .bashrc and source it

 export R_HOME=/opt/vertica/R
 export JAVA_HOME=/usr/lib/jvm/java-1.6.0-openjdk-1.6.0.34.x86_64/jre
 export DR_HOME=/opt/hp/distributedR
 export PATH=/opt/vertica/bin:/opt/vertica/R/bin:$DR_HOME/bin:$PATH
 export LD_LIBRARY_PATH=/usr/local/lib/:/opt/vertica/lib64/:/usr/lib/jvm/java-1.6.0-openjdk-1.6.0.34.x86_64/jre/lib/amd64/server:/home/dbadmin/JAGS/lib:$DR_HOME/lib:$DR_HOME/third_party/lib:$DR_HOME/third_party/lib/atomicio/:$LD_LIBRARY_PATH

 # ODBC Configurations
 export VERTICAINI=/home/dbadmin/vRODBC/vertica.ini
 export ODBCINI=/home/dbadmin/vRODBC/odbc.ini

8. Open the R console and test the connections using the following script

library(vRODBC)
connect <- odbcConnect("Test")
segment <- sqlQuery(connect, "SELECT * FROM role")
segment
odbcClose(connect)

Advertisements