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Archive for April, 2011

Ruby, Io, Prolog, Scala, Erlang, Clojure, Haskell

April 12th, 2011 No comments

I found it in the book store next to my university. Bought it.

Read the introduction, and browsed through the first chapter (Ruby). Failed to do the exercises (a mixture of feeling I already know a bit of Ruby, and lack of time and motivation to really get my hands dirty).

Stopped reading the book.

I will start over now, I promise.

 

Categories: development Tags:

Cassandra, meet Hadoop. Hadoop, meet Cassandra.

April 11th, 2011 No comments

Just noticed that somebody had already made a product/service out of the idea to integrate Hadoop and Cassandra, two major hypes names in the Big Data, NoSQL space. – which is exactly what I had been planning as new architecture for my last project.

Datastax now offers Brisk:

  • CassandraFS has the same interface as HDFS. So, in particular, you should be able to use most Hadoop add-ons with Brisk.
  • CassandraFS has comparable performance to HDFS on sequential scans. That’s without predicate pushdown to Cassandra, which is Coming Soon but won’t be in the first Brisk release.
  • Brisk/CassandraFS is much easier to administer than HDFS. In particular, there are no NameNodes, JobTracker single points of failure, or any other form of head node. Brisk/CassandraFS is strictly peer-to-peer.
  • Cassandra is far superior to HBase for short-request use cases, specifically with 5-6X the random-access performance.

Checkout their white paper.

Categories: development, technics Tags: , , ,

New Google Analytics supports event goals

April 7th, 2011 No comments



Google announced that the new Google Analytics (currently in beta and only rolled out to selected accounts) supports event goals.

So, if you have been using GA to track events within your Flash game, Social Network app or anything else, you can now interpret them directly as goals and don’t need to fake Pageview-calls of “virtual” (non-existing) pages in a hidden div or iframe (which is what I have been using before).

Interestingly, no mentioning of event funnels so far – which is strange, since funnels can be defined for “normal” goals anyway.

 

Categories: online, tools Tags: , ,