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OrientDB : Graph Store

Brief

We will be using OrientDB as the Graph Storing Component.

There are a lot of interconnections within the data like links between articles, links between promotions and articles, and links between various variants of the articles, among others. This leads to a lot of joins in traditional RDBMS systems leading to performance degradation. In order to significantly boost the performance of fetching linked data, we use a graph database.

Installation

Setup and configuration


  1. Download OrientDB Community 2.1.16 (/opt/cs/orientdb).


  1. Extract tar.gz.

    cd /opt/cs/orientdb

tar -zxvf orientdb-community-2.1.16.tar.gz

  1. Specify path and user in orientdb.sh (orientdb-community-2.1.16/bin).

    vim orientdb-community-2.1.16/bin/orientdb.sh

Add the following :
 ORIENTDB_DIR=/opt/cs/orientdb/orientdb-community-2.1.16
 ORIENTDB_USER=<system username>

  1. Change configurations.

    vim orientdb-community-2.1.16/bin/orientdb.sh

Add the following line in start() function (and comment the previous line which looks similar to the one below. This is done so that password will not be asked while starting the service).

  sudo -u $ORIENTDB_USER sh -c "cd \"$ORIENTDB_DIR/bin\"; /usr/bin/nohup ./server.sh 1>../log/orientdb.log 2>../log/orientdb.err &"

Add the following line in stop() function (and comment the previous line which looks similar to the one below. This is done so that password will not be asked while stoping the service).

  sudo -u $ORIENTDB_USER sh -c "cd \"$ORIENTDB_DIR/bin\"; /usr/bin/nohup ./shutdown.sh 1>>../log/orientdb.log 2>>../log/orientdb.err &"

  1. Specify Memory.

    vim orientdb-community-2.1.16/bin/server.sh

Search for "ORIENTDB_OPTS_MEMORY="-Xms512m -Xmx512m"".

Change it to the required values as per your hardware configurations.

  1. Replace orientdb-server-config.xml and cp OrientDB.jar.

    Note: Replace orientdb-server-config.xml with the one modified by our developers.

    cp <path of CS-Refactored >/CS-Refactored/ServerPlugins/OrientDB/src/main/resources/orientdb-server-config.xml

PATH To Copy : /opt/cs/orientdb/orientdb-community-2.1.16/config/

  1. Add plugins.

    cp <path of CS-Refactored >/ CS-Refactored/ServerPlugins/OrientDB/build/libs/OrientDB.jar

PATH To Copy : /opt/cs/orientdb/orientdb-community-2.1.16/lib

Verification

  1. Verify If Plugin (OrientDB.jar) and xml file (orientdb-server-config.xml) are present in their respective locations.

    /opt/cs/orientdb/orientdb-community-2.1.16/lib

/opt/cs/orientdb/orientdb-community-2.1.16/config.

Application Startup

  1. Start Orientdb.

    /opt/cs/orientdb/orientdb-community-2.1.16/bin/orientdb.sh start

  1. Check whether the service is running or not.

    netstat -tulpn | grep 2480

Commands

  1. Stop OrientDB.

    /opt/cs/orientdb/orientdb-community-2.1.16/bin/orientdb.sh stop

# fuser is used just to kill the process if it is running even after using 'orientdb.sh stop'

fuser -k 2480/tcp

  1. Start OrientDB.

    /opt/cs/orientdb/orientdb-community-2.1.16/bin/orientdb.sh start

  1. Check if application is running.

    netstat -tulpn | grep 2480

ps -ef | grep orientdb

Contentserv line

Last updated: Jul 27, 2018

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