Big Data Consultant

Ranko Mosic

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Top Stories by Ranko Mosic

A recent BlackBerry outage is the nightmare for both RIM and its users. Nature and mass popularity of Blackberry service  make this particular outage highly visible. There are many other in-house outages we never hear about. Companies prefer to keep silent about them, if they can. The only insight we get into the poor state of DR procedures is in some public cases like this one, or from limited personal experience. In my Oracle database infrastructure consulting career I have seen several serious production outages and was part of a few data recovery efforts. Backups and DR procedures are just not as high on IT priority list as development, production support and new projects are. Backups and DR are frequently considered a chore, mechanical stuff, uninteresting work. Oracle database works fine most of the time, it is very reliable and robust product. When disaster ... (more)

Installing Vertica

Vertica is high-performing, advanced RDBMS that is very simple to install and administer, thanks to the its modern design and purpose built architecture. Once we execute all preparatory steps on database servers and download Vertica software as per Installation Guide, we are starting installation process on a two node cluster (host01, host02): /opt/vertica/sbin/install_vertica -s host01,host02 -r vertica-ce-5.1.1-0.x86_64.RHEL5.rpm We initiate database creation process using dbadmin tool: $ /opt/vertica/bin/adminTools We will pick option 6 ( Configuration Menu ), then option 1 to... (more)

Deploying Oracle Databases to Amazon AWS (EC2, RDS)

Amazon recently added Oracle database hosting capabilities to its RDS service offering. You can rent an Oracle database related infrastructure in a pay-as-you-go fashion now. We are going to explore if corporations should be utilizing Amazon AWS Oracle Database related services (EC2, RDS ), how it should be used, where possible savings and potential trouble points are. With services like Amazon AWS it doesn't matter where your hardware and software physically is - it could be in a room next to you or in some other country. It is much easier and cheaper to procure and get new serv... (more)

Which Cloud Service Provider Should Host Your Oracle Databases?

Big shift towards Cloud environment has started. It is now clear that this change is similar in magnitude to the shift from mainframe to client-server computing two decades ago. Amazon Web Services is the pioneer and market leader in Cloud computing space. Other vendors are playing catch up and do not come close to the breadth and scale of AWS offerings. Services and features Amazon provides are quite extensive and cover many of the enterprise-class computing needs. APIs and command line interfaces are available for each service, which makes scripting and automation achievable. ... (more)

Oracle Fusion Applications - Installation and First Impressions (Part 4)

Oracle Identity Management is a component of Oracle Fusion Middleware and part of the Oracle Fusion Applications infrastructure. Its purpose is to manage user identities across the enterprise. We are going to install Oracle Internet Directory 11g (OID), Oracle Virtual Directory 11g (OVD), Oracle Identity Manager 11g (OIM), Oracle Access Manager 11g (OAM) as well as two instances of Oracle Database ( - one for the Identity Store and the other for the Policy Store. SOA Suite is first component to be installed since Identity Manager requires it. Some SOA Suite components (... (more)