Oracle10g: Manual standby database (initial approach)


An Oracle database in Standby is an exact copy of an operational database on a remote server, used as a backup, and copy for reference, disaster recovery, etc..

A database in the Standby mode is more than a normal backup because it can be put into production disaster in less time than if we had to restore a copy (either from a simple rman or export).Restore a copy from file takes time, and during this period the system is unavailable. With an additional database in standby mode there is nothing (or almost nothing to restore) in case of disaster. Within minutes, allowing the change is continuity of service. It offers the performance advantages of a cluster or safety of the mirror but the ratio of costs versus benefits and leave time seems right to me.

From a global perspective:

We release the weekly Newsletter Dataprix


Subscripción a la Newsletter Semanal de DataprixWe have modified the email subscription system to Dataprix content.

So far this subscription using the Feedburner system associated with the main RSS Dataprix to send automatically to every user subscribed to a daily email with the new publications of the previous day.

We decided to change this system to one that allows itself a subscription / low snapshot from the same page. For registered users only a matter of pressing a button, and the user is not only need to enter an email address and validate it later from the mail that will be sent.

Another advantage we get is that we will create a newsletter for each language Dataprix for each one would reach the new content of your preferred language.

Furthermore, the creation of the Newsletter will be weekly and manual, thus having the possibility to further customize the content of it, and select what they consider most interesting of everything published during the week.

The Newsletter is sent every Tuesday, referring to the new content published since the previous Tuesday.

Slowly Changing Dimensions


Slowly changing dimensions or SCD (Slowly Changing Dimensions) are dimensions in which their data tend to change over time, either occasional or constant, or involving a single record or the entire table. When these changes occur, you can opt to follow one of these two great options:

@ User Manual in Spanish Spoon


I have just completed the update of User Manual in Spanish Spoon @  (See manual..)

The manual has been prepared in full, based on the translation I have been provided by Leonardo M. Tito and Felipe Mullicundo:

jQuery FlexiGrid 2 in Pentaho

Hello People

Following a series of needs I have decided to develop for the group eglu and, of course, to all of you, a plugin that allows you to use jQuery FlexiGrid since Pentaho-CDF.
Not if you permit to happen, my especially if they need a list with a number of features such as filtering, sorting, paging, sorting, selection of visible columns, resize, etc.. Without doubt, this is what jQuery provides FlexiGrid 2.0. The theme is to make it work in Pentaho is somewhat cumbersome, this was my trigger. Without further ado I attached a video showing the functionality of the plugin. In a few days annexed to the plugin, source, demos and documentation so they can try and give me feedback. 

Spectacular graphics that meets the key figures for Google


Spectacular graphics that meets the key figures for Google


To get an idea of the volume of business that moves Google infografia nothing better than that prepared in pingdom, which collected on the same graph one timeline with key milestones of the company, impressive numbers on the form, increase in revenues , figures on company employees, and the most significant data on other successful products such as Android, YouTube, Blogger, Gmail, Chrome, Orkut or Analytics.

A good source of inspiration for anyone eager to create a scorecard where we could see these evolve dynamically as so well chosen indicators.

Surely more than one person has clicked on an indicator in the chart to see if anything more;)..

Oracle10g: Change the character set of the database


It may happen that after you install or configure a new Oracle database we realize that the character set chosen during installation is not correct. What we may happen in cases like this is to delete the database and reconfigure it or worse ...But you do not. We can change the character set stopping the database, looking up strictly by changing the settings and restart the database. Howto:

- First we connect to the database 

$ sqlplus sys/pwd@prod as sysdba

- We stop the database 



- We raise strictly * 


- Change the character map 


- Restart the database and yata 

Evolution of the importance of Dataprix, according to Alexa


Today we have consulted our position in the Alexia ranking,  and we have been pleasantly surprised to find that this March we are located at or even above doorways as TDWI o BeyeNETWORK  are undisputed global benchmark .

Pentaho BI Server 3.5.2 stable


A few minutes are up to publish the stable versions of Pentaho BI Server 3.5.2.

You can download it at:

I have not reviewed this version, but I am doing beta testing before and have found no major changes in the UI, just some updates of bookstores, but not widen too much.

Whenever I get more information, I have the relevant comments.


Twitter will migrate from MySQL to Cassandra DB


Cassandra is an open source database distributed, is one of the noteworthy projects of the Apache Software Foundation and appears to be hitting hard. By being distributed enables high availability, fault tolerance and, above all, a highly scalable without loss of performance.

And were using companies that handle large amounts of data such as Rackspace, Digg, or Facebook, and the list is expanding.

The latest news, coming from a blog interview with Ryan King MyNoSQL is that Twitter is considering migrating their MySQL server clusters Cassandra DB.

This is a product presentation, which can be found in the same web Cassandra Project 

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