When Should You Use Hadoop?

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A post from ReadWriteWeb by Klint Finley has the whole story. Here is a part:

Hadoop logo 150x150 RedMonk analyst Stephen O'Grady tackles the question "What Factors Justify the Use of Apache Hadoop?" O'Grady cites two of the most common criticisms of Hadoop: 1) Most users don't actually need to analyze big data 2) MapReduce is more complex than SQL. O'Grady confirms these criticisms, but finds Hadoop useful anyway.
O'Grady acknowledges that volume isn't the only factor in the complexity of a dataset. "Larger dataset sizes present unique computational challenges," writes Grady. "But the structure, workload, accessibility and even location of the data may prove equally challenging."

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Predicates in Core Data

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Database programming is all about filtering and sorting tables linked to each other. According to the book Core Data , «Core Data is Apple’s object graph management and persistency framework for iOS, OS X, watchOS, and tvOS.» In a sense, predicates are an object version of the WHERE clause in SQL. Just like NSFetchRequest represent the FROM clause in SQL. I never have had problems with WHERE and FROM in SQL, but the predicate format strings in Core Data has been quite a struggle for me. I don’t think the struggle is only my fault. Predicates should clearly be thought, at least to me, as a method of writing WHERE clauses. Here is some notes from tutplus’ Core Data and Swift: Relationships and More Fetching : let predicate = NSPredicate(format: "%K == %@", "last", "Doe") The predicate format string uses %K (K stands for Key) for the property name and %@ for the value. let predicate = NSPredicate(format: "%K >= %i", ...
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How To Disable Google’s Personalization Of Search Results

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Do you want to know what the rest of the world gets as answer for their search, instead of what Google thinks you may want to see? I do, therefore the post from MakeUseOf.com by Ann Smarty did catch my interest. She explains it well, both for one-time use and how to change your firefox and chrome browser, and I just copy the one-time part: 2. Disable Google Personalization: One-Time (Browser Independent) Again, you may like the feature and the fact that Google tries to show you what you really want (your favorite sites or sites you are more likely to like on top), but in some cases you will want to see “real” results (for example, to check how your own website is doing). In this case, what you need to do is manually modify the search query URL path: just add this parameter: pws=0 The ‘pws=0′ parameter removes the search personalization: If you don’t want to add the parameter manually, use this browser bookmarklet (courtesy of  Google System Blog ): Turn off Google perso...
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InvestorForum by VentureLab in Oslo a success story #startups

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Photo from Hotel Continental website 200 persons, mostly investors, joined to see what 20 startups could offer in Oslo after the finance crisis . I was astonished to see so many foreign investors, from US and from UK. There was in my opinion a lot of great projects . Since I also presented, I could only follow some: Yes Game : They have ingenuos  reduced the chess board from 8X8 to 5X6 by taking away all second officers. In that way they have create a Chess Attack, which can take you into the final stage of a chess party immediately. They have it for iPhone and very important, also as a physical board. uformia created software very well suited for 3D printing. The CEO Cherie Stamm was an American living in Norway. She softened every Norwegian heart when the said the reason was our beautiful nature. 3D Printing is in my opinion a possibility for the Western society to rebuild the manufacturing industry we lost to China. kikora presented a math editor, which evalua...
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