January 31, 2010
Hadoop at Heise c’t # <surreptitious_advertising>
Interesting for those readers speaking German: Heise published an introductory article on Hadoop in its latest issue. Have fun reading.
<surreptitious_advertising/>
Thanks to Simon for proof-reading and providing valuable input. Thanks to Thilo Fromm for the hadoop graphics (unfortunately none of them got published in its original form), the catchy title, proof-reading the text over and over again and for keeping me sane during several past and coming months.
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December 11, 2009
Apache Hadoop at FOSDEM 2010
#
Though the official schedule is not yet online: I will be giving an introductory talk about Apache Hadoop at next
year’s FOSDEM (Free and Open Source Developer European Meeting) in Brussles. This will be the 10th birthday of the
event - looking forward to a fun event, meeting other free and open source software developers from all over
Europe.
If you are a Apache
Hadoop developer and would like me to include some particular topic in the talk - please feel free to contact me. If
you are an Apache Hadoop user and would like to learn more on the project, please come to the talk and ask questions.
If you are an Apache Hadoop Newbie - feel free to join us.
In addition there will be a NoSQL Dev Room at FOSDEM
as well. The call for presentations is up already. So if you are doing fun stuff with CouchDB, HBase and friends or are
a developer of these projects - submit a talk and join us in early-February in Brussles.November 16, 2009
Open Source Expo 09 # I spent last Sunday and the following Monday at Open Source Expo Karlsruhe - co-located with web-tech and php-conference organized by the Software-and-Support Verlag. Together with Simon Willnauer I ran the Lucene/Mahout booth at the expo.
So far the conference is still very small (about 400 visitors) compared to free software community events. However the focus was set to be more on professional users, accordingly several projects showed that free software can be used successfully for various business use cases.
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October 29, 2009
Open Source Expo # Title: Open Source Expo
Location: Karlsruhe
Link out: Click here
Description: There will be a booth at Open source expo introducing interested visitors to the Apache projects Lucene and Mahout. Of course we are also happy to answer any questions on the ASF in general.
Start Date: 2009-11-15
End Date: 2009-11-16
September 9, 2009
First NoSQL Meetup in Germany # On October 22nd 2009 the first NoSQL Meetup Germany is going to take place in newthinking store/ Berlin: http://nosqlberlin.de
Please submit your presentation proposals until September 22nd, accepted speakers will be notified soon after.
If you would like to sponsor the event, feel free to contact us: We would be very happy to provide videos after the event and free drinks for everyone during the event.
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August 23, 2009
September Apache Hadoop Get Together @ Berlin # The upcoming Apache Hadoop Get Together Berlin is to take place on September 29th in newthinking store. Details are up on the web page at upcoming and will be sent out to the mailing list soon.
July 10, 2009
AMQP Erlang user group talk # Last Wednesday at the Erlang user group Berlin Matthias Radestock from the RabbitMQ project gave a talk on RabbitMQ, AMQP and messaging in general. Slides are available online.
First Matthias motivated the need for an open standard for messaging: So far, their are a few provides of middleware systems like Tibco and IBM. But those solutions are usually closed, expensive, cumbersome to handle. In short they do not fit into a world where people rely on open standards for communication, free software for development and lightweight implementations.
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June 30, 2009
Lucene slides online # The slides of the Lucene talk at the last Apache Hadoop Get Together Berlin are available online: Lucene Slides. Especially interesting to me are the last few slides which detail both index size and machine setup:
The installation is running on two standard PCs with 2 dual-core processors (usual speed, bought in January 2008 for about 4000 Euro). They have 32GB RAM, 24 GB are used as ramdisk for the index.
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June 26, 2009
Data serialization # XML, JSON and others are currently standard data exchange formats. Being human-readable but still structured enough to be easily parsable by programs is their main benefit. Problems are overhead in size and parsing time. In addition at least xml is not really as human-readable as it could be.
An alternative are binary formats. Yet those often are not platform independent (either C++ or Java or Python bindings) or are not upgradable (what if your boss comes along and wants you to add yet another field?
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June 21, 2009
Scrum Table Berlin # Last week I attended the scrum table Berlin. This time around Phillippe gave a presentation on “backlog colours”, that is types of work items tracked in the backlog.
The easiest type to track are features - that is items that generate revenue and are on the wishlist of the customer. Second type of items he sees are infrastructure items - that is, things needed to implement several features but invisible to the customer.
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