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About us

About us | DBVERSITY.COM (University of Database Technologies) | Scoop.it
  We're here to integrate all database technologies together to provide you one stop solutions for any database related queries/information. We can share your ideas, queries, information here and if you're interested to contribute any of your database technology please let…
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Now newly designed DBVERSITY !!

You can check about us at http://dbversity.com/about-us/

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What is NewSQL ?

What is NewSQL : NewSQL is a category of SQL database products that address the performance and scalability issues posed by traditional online transaction processing (OLTP) relational database management systems (RDBMS). Such systems aim to achieve the scalability of NoSQL…
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About us

About us | DBVERSITY.COM (University of Database Technologies) | Scoop.it
  We're here to integrate all database technologies together to provide you one stop solutions for any database related queries/information. We can share your ideas, queries, information here and if you're interested to contribute any of your database technology please let…
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Now newly designed DBVERSITY !!

You can check about us at http://dbversity.com/about-us/

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NodeJS And Couchbase

NodeJS And Couchbase | DBVERSITY.COM (University of Database Technologies) | Scoop.it
  The first thing you got to do is download and install Couchbase for your OS.  Navigate to http://www.couchbase.com/download and download Couchbase for Mac OSX. The install is very straight forward and easy to do and well documented. Next we…
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MongoDB Java driver testing

MongoDB Java driver testing | DBVERSITY.COM (University of Database Technologies) | Scoop.it
1. Install latest JDK(jdk-8u5-linux-x64.rpm) 2. Download MongoDB Java driver(mongo-java-driver-2.12.1.jar) 3. Export the variables / run the program in the below given format by keeping jar file in the same folder. 3. Run the java code example code;- [root@myhostname JAVA]$ cat…
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How to set-up Kerberos in RHEL

How to set-up Kerberos in RHEL | DBVERSITY.COM (University of Database Technologies) | Scoop.it
At Authentication Server ( Master KDC ) :- #######################################

 

1) Install the following Kerberos packages (on your Kerberos Server ) i.e., krb5 server, workstation & thier libraries ---------------------------------------------------------------------------------------------------------------------- Install the krb5-libs, krb5-server, and krb5-workstation packages on the dedicated machine which…

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How to add script in Linux start-up

How to add script in Linux start-up | DBVERSITY.COM (University of Database Technologies) | Scoop.it
To add the scripts in start-up, we can use any of the one following command. In the below scenario, say you wanted add mongod start/stop/restart script to Linux ( reboot/start-up) [root@12d4-dl585-03 init.d]# chkconfig --add mongod [root@12d4-dl585-03 init.d]# (OR) Add a…
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MemSQL Cluster set-up

MemSQL Cluster set-up | DBVERSITY.COM (University of Database Technologies) | Scoop.it
Step 1: Install the below required packages on all the servers which you want to make MemSQL Cluster. Required Packages for memSQL Installation :- ------------------------------------------ [root@hostname rpms]# ls -lhtr total 118M -rw-r--r-- 1 mongod games 2.8M May 14 06:43 binutils-2.20.51.0.2-5.36.el6.x86_64.rpm…
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http://dbversity.com/memsql-cluster-set-up/

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MongoDB Shard creation script

MongoDB Shard creation script | DBVERSITY.COM (University of Database Technologies) | Scoop.it
Below shell script will be useful to create a MongoDB's sharded environment on a single sever/multiple servers depending on your requirement. Things to remember to execute below automated script. 1) We should have required privileges to the user on your…
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PostgreSQL Installation

PostgreSQL Installation | DBVERSITY.COM (University of Database Technologies) | Scoop.it
PostgreSQL is an object-relational database management system (ORDBMS) based on POSTGRES, Version 4.2, developed at the University of California at Berkeley Computer Science Department. POSTGRES pioneered many concepts that only became available in some commercial database systems much later. PostgreSQL…
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PostgreSQL 

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Hadoop

Hadoop | DBVERSITY.COM (University of Database Technologies) | Scoop.it
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Setting password for MySQL root ID

Setting password for MySQL root ID | DBVERSITY.COM (University of Database Technologies) | Scoop.it
Once you're done with MySQL Installation from http://dbversity.com/mysql-rpm-installation/ You can set password for MySQL root ID as below. MySQL installs with no password protection on root access (blanks) We use this method to set it to Winter06 and GPA will…
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Tag aware sharding in MongoDB

Tag aware sharding in MongoDB | DBVERSITY.COM (University of Database Technologies) | Scoop.it
MongoDB supports tagging a range of shard key values to associate that range with a shard or group of shards. Those shards receive all inserts within the tagged range. The balancer obeys tagged range associations, which enables the following deployment…
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MongoDB ODBC Driver (by Easysoft Ltd.)

MongoDB ODBC Driver (by Easysoft Ltd.) | DBVERSITY.COM (University of Database Technologies) | Scoop.it
Real-time, SQL access to MongoDB from BI, Analytics and Reporting applications As part of our commitment to bringing SQL functionality to NoSQL databases, we are pleased to release a beta version of our MongoDB ODBC Driver. Our driver allows you…
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[MariaDB]: Overview & Installation

[MariaDB]: Overview & Installation | DBVERSITY.COM (University of Database Technologies) | Scoop.it
MariaDB is a drop-in replacement for MySQL. MariaDB strives to be the logical choice for database professionals looking for a robust, scalable, and reliable SQL server. To accomplish this, the MariaDB Foundation work closely and cooperatively with the larger community…
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http://dbversity.com/mariadb-overview-installation/

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Creating a view on the fly from code using Node.JS

Creating a view on the fly from code using Node.JS | DBVERSITY.COM (University of Database Technologies) | Scoop.it
The Code : // load the Couchbase driver and connect to the cluster var couchbase = require('couchbase'); var cluster = new couchbase.Cluster('localhost:8091'); //it is important to make this async call as otherwise you will try create the //view before the…
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Failed to create a table in Hive backed by HBase ?

Failed to create a table in Hive backed by HBase ? | DBVERSITY.COM (University of Database Technologies) | Scoop.it
Failed to create a table in Hive backed by HBase. Will it fix the error to copy hbase-site.xml into /etc/hive/conf/ ? Often when you use Impala with Hbase and first you need create metastore from Hive. $ hive --auxpath /opt/cloudera/parcels/CDH-4.5.0-1.cdh4.5.0.p251.30/lib/hive/lib/zookeeper.jar,/opt/cloudera/parcels/CDH-4.5.0-1.cdh4.5.0.p251.30/lib/hive/lib/hbase.jar,/opt/cloudera/parcels/CDH-4.5.0-1.cdh4.5.0.p251.30/lib/hive/lib/hive-hbase-handler-0.10.0-cdh4.5.0.jar,/opt/cloudera/parcels/CDH-4.5.0-1.cdh4.5.0.p251.30/lib/hive/lib/guava-11.0.2.jar…
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Hadoop Streaming with Python

Hadoop Streaming with Python | DBVERSITY.COM (University of Database Technologies) | Scoop.it
Hadoop Streaming Hadoop streaming is a utility that comes with the Hadoop distribution. The utility allows developers to create an run Map/Reduce jobs with any executable or script as the ampper and/or the reducer. For example: hadoop jar /opt/cloudera/parcels/CDH/lib/hadoop-0.20-mapreduce/contrib/streaming/hadoop-streaming-2.0.0-mr1-cdh4.5.0.jar \…
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yum install “package” is Not working ?!!

yum install “package” is Not working ?!! | DBVERSITY.COM (University of Database Technologies) | Scoop.it
How do we copy ‘Yum Repositories’ from one server to another :- Imagine, you have java package not available in your SERVER#1 and you know it is available with SERVER#2. Then you can copy the require yum repositories configs from…
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Node requirement for MemSQL commands

Node requirement for MemSQL commands | DBVERSITY.COM (University of Database Technologies) | Scoop.it
MemSQL commands must be run on the appropriate type(s) of node in a MemSQL cluster. Please refer the link MemSQL Commands by Type — MemSQL 2.6 documentation for more details. X = recommended to run on this type of node…
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There is no reason at all to use MySQL !

There is no reason at all to use MySQL ! | DBVERSITY.COM (University of Database Technologies) | Scoop.it
MySQL was once the most popular open source database (it still is), but it’s popularity and deployment is declining under the ownership of Oracle. The founder of MySQL Michael Widenius “Monty” was not happy when Oracle announced to acquire MySQL…
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Depth of an attribute in Document

Depth of an attribute in Document | DBVERSITY.COM (University of Database Technologies) | Scoop.it
Say my document is very huge & have multiple sub-documents & attributes (i.e, dotted notation with long depth) in it. And assume I don't the schema design of my document, but I want to query on the db to count…
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Depth of an attribute in Document in MongoDB
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Hadoop

Hadoop | DBVERSITY.COM (University of Database Technologies) | Scoop.it
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Chunk Size in MongoDB

Chunk Size in MongoDB | DBVERSITY.COM (University of Database Technologies) | Scoop.it
  When the first mongos connects to a set of config servers, it initializes the sharded cluster with a default chunk size of 64 megabytes. This default chunk size works well for most deployments; however, if you notice that automatic…
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MongoDB Connector for Hadoop

MongoDB Connector for Hadoop | DBVERSITY.COM (University of Database Technologies) | Scoop.it
Purpose The MongoDB Connector for Hadoop is a library which allows MongoDB (or backup files in its data format, BSON) to be used as an input source, or output destination, for Hadoop MapReduce tasks. It is designed to allow greater…
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Hadoop Streaming

Hadoop Streaming | DBVERSITY.COM (University of Database Technologies) | Scoop.it
Hadoop Streaming ---------------- Hadoop streaming is a utility that comes with the Hadoop distribution. The utility allows you to create and run Map/Reduce jobs with any executable or script as the mapper and/or the reducer. For example: $HADOOP_HOME/bin/hadoop jar $HADOOP_HOME/hadoop-streaming.jar…
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