Michael Schatz[1]: Otherwise, the main technical challenge of this design is the graph structure must be available at each step of the iterative algorithm, but in the design above we only distribute the mutable values (partial PageRank value, partial search path, etc). This challenge is normally resolved by encoding the graph structure and mutable values as tuples that are separately tagged to ind
Karmasphere, a a Big Data Intelligence (BDI) software company bringing Apache Hadoop power to developers and analysts, has published the results of a survey among Hadoop users. The report can be downloaded from ☞ here (PDF). Interesting notes: Within a year, 86% of projects have moved to either active development or productionIn 68% of the cases, the first use of Hadoop was not mandated by s
I was reading ☞ this post by Mark Suster explaining the innovator’s dilemma, incumbent and new comers behavior in the market. And then I realized that it applies very well to the NoSQL databases market too: Professor Clayton M.Christensen’s, author of The Innovator’s Dilemma, definition: An innovation that is disruptive allows a whole new population of consumers access to a product or service that
Just a quick reference of the continuously growing Hadoop tools ecosystem. HadoopThe Apache Hadoop project develops open-source software for reliable, scalable, distributed computing. hadoop.apache.org HDFSA distributed file system that provides high throughput access to application data. hadoop.apache.org/hdfs/ MapReduceA software framework for distributed processing of large data sets on compute
Hal Varian[1] said a couple of years ago[2]: The sexy job in the next ten years will be statisticians. While Hal Varian’s call it statisticians, others have been using terms like data scientists. But what is data science? O’Reilly has long but very interesting article on this subject: The web is full of “data-driven apps.” Almost any e-commerce application is a data-driven application. There’s a d
In case you have a hard time reading it: RDBMS (SQL) was worried when the news about a new technology called NoSQL SQL: Oh, he is this new NoSQL guy. People say he is here to beat me out. Hmm. I just hate him! NoSQL: Howdy, senior SQL. How are you? SQL: um… uh… oh Hi young man. Looks like you are new to this place? NoSQL: Oh yeah! Just out of the ‘Latest computing trends’ school. SQL: He is just a
An extensive post about Hadoop best practices and anti-patterns from Yahoo!: This blog post represents compendium of best practices for applications running on Apache Hadoop. In fact, we introduce the notion of aGrid Pattern which, similar to a Design Pattern, represents a general reusable solution for applications running on the Grid. This blog post enumerates characteristics of well behaved appl
From ☞ DBMS2: eBay sees Hadoop as an interesting tool for certain special purposes: eBay likes Hadoop for certain tasks such as image analysis.eBay doesn’t like Hadoop for anything that requires data movement, such as a join.Similarly, eBay doesn’t like HBase.But based on reports from Hadoop World it looks like eBay usage of Hadoop is quite wide: eBay had a 4 node cluster in 2007, a 28 and a 10 no
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