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Big Data Consultant

Ranko Mosic

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Top Stories by Ranko Mosic

Many products are available as open source or proprietary products that can handle Big Data. Which one is best fit for this task? Today's classic RDBMSs and tools are able to quickly load the data, process it and present results in an easy to understand format.  You can use SQL or programmatic interface to process the data randomly or in batch; RDBMS's keep data safe, protected against hardware and software failures. Standards tools and products are not able to cope with Big Data requirement, which is not dissimilar to  what is involved in processing today's regular data sets, just on a much bigger scale. Mainstream companies like telcos, financials, web companies as well as government are reaching the limit of what  can be efficiently processed by classic RDBMS techhnologies. When it comes to picking a proper platform and tools to handle your Big Data there are a cou... (more)

Big Data: Enterprise Class Machine Learning with Spark and MLbase

Machine Learning is a critical part of extracting value from Big Data. Choosing proper model, preparing data and getting usable results on large scale data is non-trivial exercise. Typically process consists of model prototyping using higher level, (mostly) single machine based tool like R, Matlab, Weka, then coding in Java or some other language for large scale deployment. This process is fairly involved, error prone, slow and inefficient. Existing tools aiming at automating and improving this process are still somewhat immature and wide scale Machine Learning enterprise adopti... (more)

The Oracle Database Cloud Service vs Oracle on Amazon RDS, EC2

The Oracle Database Cloud is Platform as a Service ( PaaS ) so it only makes sense to compare it to Oracle on Amazon RDS.  Oracle on Amazon EC2, on the other hand, is an IaaS ( Infrastructure as a Service ) offering, which gives you full control over the installation, features and actions around your database. Oracle Public Cloud will consist of a number of major services, the Oracle Database Cloud being one of them. Please refer here for a complete list  of services. One of the most interesting characteristics of the Oracle Database Cloud is that there is no need to  purchase d... (more)

Importance of Having DR Procedures

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 proc... (more)

Oracle RMAN, BMC Patrol Catalogs Hosted in Amazon Cloud

Oracle RMAN  (Recovery Manager) catalog database contains backup metadata for all enterprise wide Oracle databases. Each database backed up through RMAN needs connection to a central backup repository database. RMAN catalog  is purged and maintained by removing obsolete backup records, crosschecking with existing media etc. If central repository grows too big then backup performance will suffer since it will take too long for RMAN to locate metadata. Amazon Web Services gives us the ability to quickly and easily create either brand new RMAN catalog database or move an existing c... (more)