NoSQL Data Modeling Techniques

Originally posted on Highly Scalable Blog:

NoSQL databases are often compared by various non-functional criteria, such as scalability, performance, and consistency. This aspect of NoSQL is well-studied both in practice and theory because specific non-functional properties are often the main justification for NoSQL usage and fundamental results on distributed systems like the  CAP theorem  apply well to NoSQL systems.  At the same time, NoSQL data modeling is not so well studied and lacks the systematic theory found in relational databases. In this article I provide a short comparison of NoSQL system families from the data modeling point of view and digest several common modeling techniques.

I would like to thank Daniel Kirkdorffer who reviewed the article and cleaned up the grammar.

To  explore data modeling techniques, we have to start with a more or less systematic view of NoSQL data models that preferably reveals trends and interconnections. The following figure depicts imaginary “evolution” of the major NoSQL…

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Slack, Flickr Co-Founder Butterfield’s Business Collaboration App, Exits Beta & Goes Freemium

Originally posted on TechCrunch:

Stewart Butterfield, the co-founder of Flickr who eventually left its acquirer Yahoo and started TinySpeck (and an ill-fated multiplayer game called Glitch), last year decided to take a different turn, porting his expertise in consumer services to tackle the enterprise market. The result was Slack , a collaboration platform that lets users port in conversations and links to other work from dozens of other apps (including Dropbox, Google Docs, GitHub and Asana) so that they can track progress on different projects in one common platform; more generally converse about work in a less fragmented way, and crucially reduce email overload.

Or, in Butterfield’s words, help the working world emerge from “email bankruptcy.”

Today, after a successful, limited beta run that kicked off in August 2013, Slack is launching to the rest of the world — a step, Butterfield tells me, that it’s making as it prepares to introduce pricing tiers…

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Facebook Starts Showing Fewer Text Status Updates From Pages, More From Friends | TechCrunch

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Facebook has just announced a slight tweak to the Newsfeed algorithm. The newest version of the Newsfeed will show fewer text-based status updates from Pages,..

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Top 10 cloud trends for 2014 | GigaOM Tech News

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Cloud computing made big strides in 2013. Let’s start with a quick recap. The public cloud Infrastructure-as-a-Service (IaaS) market has seen many new entrants in the form of Google, HP, and Microsoft. Amazon Web Services (AWS) has launched more than 200 new features this year.


Apache Hadoop has gone mainstream with the traditional database vendors partnering with young startups to offer big data as a service. Salesforce has finally bridged and Heroku. VMware got rid of every distraction to focus on the hybrid cloud market. Pivotal has gone live with Cloud Foundry, and Red Hat OpenShift graduated to the second version.


On the Mobile Backend-as-a-Service (MBaaS) front, Parse was acquired by Facebook while PayPal bought StackMob. Enterprises gained confidence in cloud computing and they are planning to go beyond development and testing environments. OpenStack saw yet another release this year with increased support from the industry. Devops has become mainstream with enterprises taking it seriously. And cloud-based management services picked up momentum, offering additional opportunities for the traditional system integrators.


What’s in store for the cloud in 2014?


Click headline to read more–

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Phonebloks: Open, modular phone hardware platform

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Support Phonebloks! A phone worth keeping by Dave Hakkens (Radical design thinking: Open, modular phone hardware platform.

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Nielsen: Internet Advertising Grew 32% In 2013, But It’s Still Only 4.5% Of Spend Vs. TV At 57.6%

Originally posted on TechCrunch:

Nielsen put out its latest figures on the state of the advertising market across old and new media platforms this morning. One big takeaway is that Internet advertising continues to be the fastest-growing medium, but it remains a small player. Global display advertising across the web, mobile internet and apps collectively grew by 32.4% in 2013 — by far the biggest leap of any media — but that still worked out to a 4.5% share of the overall spend in ads. In contrast, television grew only 4.3% but remains the behemoth when it comes to ad spend, taking nearly 58% of the market.

Nielsen does not include monetary figures in its forecasts — only what percentages each platform is getting in terms of ad spend, and how those are declining or growing. For an idea of what kind of size we are looking at here, Zenith Optimedia estimates that in…

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Evernote’s Market For Physical Goods Now Accounts For 30% Of Its Monthly Sales

Originally posted on TechCrunch:

Evernote‘s CEO Phil Libin today disclosed some of the company’s latest revenue numbers at LeWeb in Paris. While it took Evernote about 16 months to get to the first $1 million in sales through its freemium model, he said, Evernote Business took five months and Evernote Market, which launched this September, took just a single month.

Right after the launch of the Market, which offers users everything from post-it notes to Evernote-branded socks and backpacks, the company started having a hard time keeping many items in stock, Libin said. To him, the market isn’t just a merchandising business, however, it’s a mainline product. The bestsellers in the store are backpacks, the Scansnap Evernote Scanner and the Jot Script Stylus. Together, they make up about 30% of Evernote Market sales and the marketplace itself is now responsible for 30% of Evernote’s monthly sales.

Before it launched, premium accounted for 89%…

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