For some reasons I started to play with Apache Hadoop (Core):

Hadoop is a software platform that lets one easily write and run applications that process vast amounts of data.

Here’s what makes Hadoop especially useful:

• Scalable: Hadoop can reliably store and process petabytes.
• Economical: It distributes the data and processing across clusters of commonly available computers. These clusters can number into the thousands of nodes.
• Efficient: By distributing the data, Hadoop can process it in parallel on the nodes where the data is located. This makes it extremely rapid.
• Reliable: Hadoop automatically maintains multiple copies of data and automatically redeploys computing tasks based on failures.

Hadoop implements MapReduce, using the Hadoop Distributed File System (HDFS). MapReduce divides applications into many small blocks of work. HDFS creates multiple replicas of data blocks for reliability, placing them on compute nodes around the cluster. MapReduce can then process the data where it is located.

Hadoop has been demonstrated on clusters with 2000 nodes. The current design target is 10,000 node clusters.

I followed the Quickstart guide and I can confirm that it works on Mac OS X too, but I managed only to make it run in “standalone” mode: usefull for first-stage development and debugging.
Continue…

Here we are. 0.2.
0.2 of nothing but a “divertissment” which help me to learn better and better the Cocoa Framework, and discover all the magic stuff it does.

The release notes is:

0.2 (2007-09-09)

Support for Italian, Spanish, French and German (Thanks to Manu).

New “Preferences” panel to set the “Default Currency” to convert from/to and the “Default Currency Ammount” to set at the application startup (Thanks to the Alhandra’s suggestion).

Remove a Bug in the “German Mark” definition (I wrote “Deutsche Mark” in the English version )

One important aspect I learnt is how to bind Preferences to the User Defaults (the Cocoa default preferences system). Pratically, the one that generates, for every app, a file .plist in your ~/Library/Preferences directory. Unix-Style joined with Apple-Style.

Who is interested, I updated the HiEuro page with Binary and Source of the version 0.2. so, don’t be shy!

First release, first problem.

After a lot of research about the standard ISO 4217 (the one that define the “3 letter name” for every currency in the world) and all the symbols of European currencies, I miss one: the Slovenian Tolar.

If someone is able to find it out and, ideally, to give me the relative Unicode it will be very appreciated.

Also, I’m looking for someone able to translate the name of the different currencies (13) in, at least, French, German and Spanish. Other languages are welcome too. Manu, this call is to you .

I started. What? My “project” of learn how to write (serious) apps for Mac OS X. Using Cocoa. Details on the “official” page: Experiments with Cocoa.

Cocoa Butter…

What’s the first “experiment”? HiEuro!

I tried it from the first release, but I was disappointed because of the “heavyness” of the indexing process: all my apps seems to be like “yawning” at every interaction I did.

But because I like Google (yes, I said! I like it!) I thought “why don’t give to it another chance?”.

I read a post on the Official Google Mac Blog about the latest release (1.1.0.520 (8/31/2007)) and I simply installed it (not a classical Mac OS X installer, but we can forgive this…).

I’ll let you know if all the improvement are enough to “avoid to kill the performance of my pretty honey IceBook”.

I know: Samba is Open Source and you can ALREADY do it by hand (on Tiger too) but it’s quite easier if you have a panel to set up it quicker.

Take a look at this:

Here is a complete gallery of screen-shots of the latest build of Leopard: 9A527.

Source, mela|blog.it.