Understanding HBase and BigTable - Jimbojw.com From Jimbojw.com The hardest part about learning HBase (the open source implementation of Google's BigTable), is just wrapping your mind around the concept of what it actually is. I find it rather unfortunate that these two great systems contain the words table and base in their names, which tend to cause confusion among RDBMS indoctrinated individuals (like myself). This article aims to describe these distributed data storage systems from a conceptual standpoint. It's all in the terminology Fortunately, Google's BigTable Paper clearly explains what BigTable actually is. A Bigtable is a sparse, distributed, persistent multidimensional sorted map. Note: At this juncture I like to give readers the opportunity to collect any brain matter which may have left their skulls upon reading that last line. The BigTable paper continues, explaining that: The map is indexed by a row key, column key, and a timestamp; each value in the map is an uninterpreted array of bytes. map persistent distributed sorted
ArangoDB - The universal free and open source nosql database Apache Hadoop! HBase Home Redis 52 Cool Facts About Social Media 13.5K Shares 13.5K Shares × As social media continues to gain acceptance as a bona-fide communications platform, I thought it might be fun to have a cool fact about it for every week of the year. So, here are ten facts about the five most well-known social media outlets – Facebook, Twitter, LinkedIn, YouTube and blogging – with two more bonus facts thrown in just for fun. (And to get to the figure of a fact a week for a year). Enjoy! Facebook 1. Statistics from Facebook press office. Twitter 11. Statistics from Twitter and the Chirp Conference . LinkedIn 21. Statistics from LinkedIn press centre and SysComm International . YouTube 31. Statistics from YouTube press centre. Blogging 41. 77% of Internet users read blogs. 42. Statistics from Technorati’s State of the Blogosphere 2009 . Bonus Facts 51. 90% of Internet users know at least one social network. 52. Statistics from Online Media Gazette . Cheers!
Ehcache | Performance at Any Scale 60 Inspiring Examples of Twitter in the Classroom Social media offers some great opportunities for learning in the classroom, bringing together the ability to collaborate, access worldwide resources, and find new and interesting ways to communicate in one easily accessible place. Teachers and educators around the world have found innovative ways to use Twitter as a teaching tool, and we’ve shared many of these great ideas here with you. Read on, and we’ll explore 60 inspiring ways that teachers and students can put Twitter to work in the classroom. Communication Twitter makes staying in touch and sharing announcements super simple and even fun. Twitter as a bulletin board: Jim Newman at Northern Illinois University uses Twitter as a bulletin board for his class, letting students know about last minute news like canceled classes. Organization Twitter’s hashtags and other tools share a great way to organize information for your classroom. Resources Use these ideas to take advantage of the vast resources that Twitter has to offer.
leveldb - A fast and lightweight key/value database library by Google. HTML 5 Reference It is useful to make a distinction between the vocabulary of an HTML document—the elements and attributes, and their meanings—and the syntax in which it is written. HTML has a defined set of elements and attributes which can be used in a document; each designed for a specific purpose with their own meaning. Consider this set of elements to be analogous to the list of words in a dictionary. The basic structure of elements in an HTML document is a tree structure. 3.1 Syntactic Overview There are two syntaxes that can be used: the traditional HTML syntax, and the XHTML syntax. The HTML syntax is loosely based upon the older, though very widely used syntax from HTML 4.01. <! XHTML, however, is based on the much more strict XML syntax. <html xmlns=" HTML Document</title></head><body class="example"><h1>Example</h1><p>This is an example HTML document. 3.2 The Syntax 3.2.1 DOCTYPE Declaration 3.2.1.1 Obsolete But Permitted DOCTYPEs 3.2.2 Elements tag name
Apache Accumulo SimpleDB Amazon SimpleDB is a highly available NoSQL data store that offloads the work of database administration. Developers simply store and query data items via web services requests and Amazon SimpleDB does the rest. Unbound by the strict requirements of a relational database, Amazon SimpleDB is optimized to provide high availability and flexibility, with little or no administrative burden. Behind the scenes, Amazon SimpleDB creates and manages multiple geographically distributed replicas of your data automatically to enable high availability and data durability. The service charges you only for the resources actually consumed in storing your data and serving your requests. You can change your data model on the fly, and data is automatically indexed for you. The service allows you to focus fully on value-added application development, rather than arduous and time-consuming database administration. Amazon SimpleDB passes on to you the financial benefits of Amazon’s scale.