Sound an alarm: Sharding in the next release of Oracle Database 12c!

There is very little—if anything—about NoSQL that is incompatible with the relational model, the RDBMS vendors will eventually absorb the innovations of the NoSQL camp. Sharding is the perfect example and Oracle will announce support for it an Oracle OpenWorld 2015.(read more)

Cassandra 2.0 Architecture

In this article, I will cover various key structures that makes up Cassandra. We will also see what structure resides in memory and what resides on disk.

In next article, I will give an overview of various key components that uses these structure for successfully running Cassandra. Further articles will cover more details about each structure/components in details

Cassandra Node Architecture:

Cassandra is a cluster software. Meaning, it has to be installed/deployed on multiple servers (more...)

Introduction to MongoDB Security

View it on my new blog Last week at the Paris MUG, I had a quick chat about security and MongoDB, and I have decided to create this post that explains how to configure out of the box security available in MongoDB. You can find all information about MongoDB Security in following documentation chapter: In this post, I won't go into the detail about

Moving My Beers From Couchbase to MongoDB

See it on my new blog : here Few days ago I have posted a joke on Twitter Moving my Java from Couchbase to MongoDB — Tugdual Grall (@tgrall) January 26, 2015 So I decided to move it from a simple picture to a real project. Let’s look at the two phases of this so called project: Moving the data from Couchbase to MongoDB Updating the application code to use

Thoughts and notes, Thanksgiving weekend 2014

I’m taking a few weeks defocused from work, as a kind of grandpaternity leave. That said, the venue for my Dances of Infant Calming is a small-but-nice apartment in San Francisco, so a certain amount of thinking about tech industries is inevitable. I even found time last Tuesday to meet or speak with my clients at WibiData, MemSQL, Cloudera, Citus Data, and MongoDB. And thus:

1. I’ve been sloppy in my terminology around “geo-distribution”, in (more...)

Openworld 2014

Oracle OpenWorld

Are you going to Oracle OpenWorld 2014? I am, and I hope to see you there! As you probably know, OpenWorld is a humongous event with tens of thousands of people in attendance and some amazing presentations. Why, I even hear Oracle’s new CTO might be there. I wonder if he has anything to talk about?

This year we’ll have a ton of activity at the Delphix booth. You can check out the speaking schedule, (more...)

Editor’s Choice award at ODTUG Kscope14: NoSQL and Big Data for the Oracle Professional

My paper on NoSQL and Big Data won the Editor’s Choice award at ODTUG Kscope14. Here are some key points from the paper: The relational camp made serious mistakes that limited the performance and usefulness of the relational model. NoSQL is based on the incorrect premise that tables in the relational model must be mapped to […]

ADF UI with MongoDB for persistence

The sample application (JDeveloper 12c / 12.1.2) can be downloaded from here.
This is a simple ADF application whose underlying business service implementation uses MongoDB for persistence.
The application allows create & update operations on a one-to-many data model (Department-Employees)

As shown in the screenshot below, you can (more...)

How to implement Document Versioning with Couchbase

Introduction Developers are often asking me how to "version" documents with Couchbase 2.0. The short answer is: the clients and server do not expose such feature, but it is quite easy to implement. In this article I will use a basic approach, and you will be able to extend (more...)

SQL to NoSQL : Copy your data from MySQL to Couchbase

TL;DR: Look at the project on Github. Introduction During my last interactions with the Couchbase community, I had the question how can I easily import my data from my current database into Couchbase. And my answer was always the same: Take an ETL such as Talend to do it Just write a (more...)

Six months as Technical Evangelist at Couchbase

Already 6 months! Already 6 months that I have joined Couchbase as Technical Evangelist. This is a good opportunity to take some time to look back. So first of all what is a Developer/Technical Evangelist? Hmm it depends of each company/product, but let me tell you what it is for (more...)

Screencast : Fun with Couchbase, MapReduce and Twitter

I have created this simple screencast to show how you can, using Couchbase do some realtime analysis based on Twitter feed. The key steps of this demonstration are Inject Tweets using a simple program available on my Github Couchbase-Twitter-Injector Create views to index and query the Tweets by User name Tags (more...)

NoSQL and Oracle, Sex and Marriage

At last week’s Dallas Oracle Users Group meeting, an Oracle DBA asked me, “With all the new database alternatives out there today, like all these open source NoSQL databases, would you recommend for us to learn some of those?”

I told him I had a theory about how (more...)

Thirty years on, 10gen emulates Oracle

It's now more than thirty years since I first came across the Oracle database. At that time, Oracle had only just got a distributor in the UK (a small part of CACI, with just three staff: Geoff Squire, Mike Evans and Chris Ellis - soon to be joined by Ian (more...)

The 3 ways Hadoop will change your Business Intelligence

“It’s the analytics stupid!” Obviously the offense is not intended at the dear reader. It’s a wake up call for all the people excited with Hadoop and lack BI vision. The BI people that lack infrastructure vision are also to blame. Blame for what? We’ll see later in this (more...)

InfoQ : Running the Largest Hadoop DFS Cluster

Since I joined a Big Data Event : Frankfurter Datenbanktage 2013 - I started to take also a look to non-relational technics too. The RDBMS is not for every asepct the correct and fitting and fulfilling answer to all data related IT challenges. 

Frequently I wondered about how facebook (more...)

Easy application development with Couchbase, Angular and Node

A friend of mine wants to build a simple system to capture ideas, and votes. Even if you can find many online services to do that, I think it is a good opportunity to show how easy it is to develop new application using a Couchbase and Node.js. So (more...)

How to get the latest document by date/time field?

I read this question on Twitter, let me answer the question in this short article. First of all you need to be sure your documents have an attribute that contains a date ;), something like : To get the "latest hired employee" you need to create a view, and emit (more...)

Introduction to Collated Views with Couchbase 2.0

Most of the applications have to deal with "master/detail" type of data: breweries and beer department and employees invoices and items  ... This is necessary for example to create application view like the following: With Couchbase, and many of the document oriented databases you have different ways to deal with this, (more...)

Everything you ever wanted to know about Big Data, but had no PDF to carry around!

Back in March 2012 I experienced an air milage overflow: almost straight from Madrid I’ve picked a flight to Israel to speak at a Big Data conference, only to be back in Lisbon and fly again to Johannesburg in South Africa to meet several customers in the retail and manufacturing area. Back to Lisbon I packed again to London [...]