A column-oriented DBMS is a database management system (DBMS) that stores its content bycolumn rather than by row. It serializes all of the value of a column together, then the values of the next column, and so on. So, only the columns in the query need to be retrieved.

A columnar database has an advantage over row oriented dtabases in terms of efficiency of hard-disk access.

Aside from that, you can also get the following benefits when you use a columnar database:

1. Better analytic performance - the row-oriented approach allows better performance in running a large number of simultaneous queries.

2. Rapid joins and aggregations - the data access streaming along column-oriented data allows for incrementally computing the results of aggregate functions, which is critical for data warehouse applications.

3. Suitability for compression - it eliminates storage of multiple indexes, views, and aggregations, and facilitates vast improvements in compression.

4. Rapid data loading - in a columnar arrangement, the system effectively allows one to separate storage by column. This means that each column is built in one pass, and stored separately, allowing the database system to load columns in parallel using multiple threads.

Further, related performance characteristics of join processing built atop a column store is often sufficiently fast that the load-time joining required to create fact tables is unnecessary, shortening the latency from receipt of new data to availability for query processing.

Finally, since columns are store separately, entire table columns can be added and dropped without downing the system, and without the need to returning the system following the change.

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However, there are also some drawbacks/challenges because no one-size-fits all system.

In terms of load time, converting the data source into columnar format can be unbearably slow where tens or hundreds of gigabytes of data are involved.

The incremental loads can be performance problematic.

For data compression, some columnar systems greatly compress the source data. However uncompressing the data to read it can slow performance.

There are also structural limitations. Columnar databases use different techniques to simulate a relational structure. Some require the same primary key on all tables, meaning the database hierarchy is limited to two levels. The limits imposed by a particular system may not seem to matter, but remember that your needs may change tomorrow. Constraints that seem acceptable now could prevent you from expanding the system in the future.

And lastly for scability. Columnar databases major advantage is to get good performance on large databases. But how about when you are dealing with common size database? Is it reasonable enough to use columnar database?

There have never been such a wide choice out there for techies than there is today. With such a wide variety of tech being released this year it can be hard to make the right choice and get the best gadget that suits you. With so much up and coming tech even now in November promising the best of the best in terms of performance often delivering little, there’s a lot to consider when making your decision. That’s where we come to give you a hand. Here is our top 5 tech.

LG G FLEX

The LG G Flex came out in February this year. It is the first phone to offer a POLED curved screen, the curved screen offers a more panoramic and immersive experience with a 720 x 1280 resolution. Feature wise the G Flex has a 6 inch screen, 2 GB of RAM, 32GB internal memory, 4G, a 13mp camera and a whopping 3,500 curved mAh battery. The phone also comes with a self-healing back cover which protects it from scratches and is said to heal them in 5 minutes.

HTC One M8

The HTC One M8 is simply an all-round great Android smartphone. It comes with 2 GB of ram, a 2.3 GHz quad core processor and come in both 16 and 32 GB variants. It has a 5 inch screen and dual, yes dual 4MP cameras on the back and is upgradeable to Androids latest 5.0 Lollipop OS. The build quality on the M8 is impressive in its own right using high quality materials and Corning Gorilla Glass 3. If it’s a premium quality flashy phone you are looking for than the HTC One M8 is a great choice.

Microsoft Surface Pro 3

The Microsoft Surface platform devices have gone through an identity crisis these past few years since release. The surface pro 3 is the first to finally deliver on all of the promises that Microsoft has made time and time again. Its specs are on par if not better than many of the top of the line Ultrabooks that have come out this year. It can sit up on any surface including your lap all thanks to the new hinge and kickstand, also kitted with your standard USB port and finally a well-deserved overhaul to the resolution that doesn’t make holding it as a tablet uncomfortable and awkward. It’s a refreshing new look to the well needed surface series and it’s the closest thing Microsoft has made that is comparable to both the iPad and iMac, with the advantage of all its features stuffed into one product with a price tag to match.

iPhone 6

The iPhone 6 is Apple’s most impressive phone to date, both in terms of physical size and its hardware specification. The iPhone 6 is the largest and thinnest iPhone yet with a 4.7-inch awe inspiring retina HD display or a massive 5.5-inch retina HD display if you chose the iPhone 6 Plus model. It features the new 8-megapixel iSight camera and a new 64-bit A8 chip with an M8 motion co-processor built in house. The iPhone 6 also has a on board fingerprint scanner built into the home button like the Samsung Galaxy S5 and sporting Apples new iOS 8 operating system.

Dell Chromebook 11

A perfect matrimony of design, performance, battery life, graphics and overall build quality. The Dell Chromebook 11 has a 11.6 inch screen with a resolution of 1,366 x 768. It is powered by a Dual Core Intel Celeron 2955U pushing out 1.4 GHz with on board Intel HD graphics and comes with either 2 or 4 GB of ram. Other noteable features of the Dell Chromebook 11 are it has a 16 GB SSD, HDMI out, SD card port and 2 USB 3.0 ports. Boot time is less than 10 seconds and has an excellent battery life. It’s an excellent package and you can pick it up for under £200 which is a steal.

About the author:

Cass is a writer and blogger covering all aspects of technology and home improvements. Working with companies such as JNB Aerials to promote the best technology to the world.

Running a modern business is nothing like it was twenty years ago. While computers may have been around back then, they were nowhere near as prevalent. It is vital that all company bosses move with the times and utilize all the latest tech to ensure their company makes the most profit possible. At the end of the day, your staff cost a lot of money to employ. So, if there are software solutions around that could save them time, they’ll become more productive. We’ve scoured the internet to find some of the best technology solutions you might like to consider. Most of them are used by thousands of businesses across the world.

If you only have a small budget, you’ll probably want to know how to get the best software without breaking the bank. Luckily, there are lots of articles online that can point you in the right direction. Just spend a few moments researching at some point in the near future. Thanks to monthly and yearly subscriptions, you no longer have to spend thousands to get the best solutions.

Apple computers

Whether you realize it or not, Apple computers are much better than their Microsoft counterparts. Not only do they run at faster speeds, but they’re almost immune to most of the viruses that can affect Windows systems. You can also get hold of lots of tools designed to improve performance even further. Mackeeper is one such tool. The cost of Mackeeper is lower than you might imagine, and so you should consider adding it to your machines as soon as they are delivered.

Video calling solutions

You need to deal with your customers and clients in the most-effective way possible. While you shouldn’t overlook the benefits of adding a live chat solution to your website, video calling with provide you with the best results. It will also help to increase consumer confidence in your brand. There is lots of different software you could use, but Skype is probably the best one out there. That is the case simply because the bulk of people who want to get in touch with you should have it installed on their machines.

Secure servers

You’ll want all the computers in your office to be interlinked. That means you’ll need to purchase a good quality server. You only have to look online to see a vast selection of good products on the market today. It is always a good idea to call in the professionals when it comes to setting up your server. The last thing you want is to find out hackers have managed to gain access and steal your most-important documents. Not only could that land you in trouble with the authorities, but it could also create the impression that you don’t know what you’re doing.

So long as you have those three essential technology solutions at hand, your chances of becoming successful will increase dramatically. While there are lots of other technology items you might require, those basic solutions are the best way to start.

Thanks for reading!

Phil Whitehouse

Nowadays, your participation in any large event like trade shows will demand that you provide internet access for participants. There are many companies that will try to provide access to you, and venues have their own systems hard-wired into their facilities. 

Unfortunately, neither will be completely reliable alternatives. Many companies treat event internet as an addition to their main business, and many venue solutions can be easily overwhelmed with traffic that they weren't designed to handle. For reliable internet for events, contact Trade Show Internet. They specialize in providing event internet, and their solutions can be scaled to your capacity and technological needs. 

Trade Show Internet provides both internet and bandwidth solutions. Simply put, bandwidth is the capacity of your network. You will want to match your internet technology with your capacity. They provide their internet services almost everywhere across the country, including Nashville event WiFi service and event WiFi in Boston. Wherever you are, contact them at http://tradeshowinternet.com.

It’s no secret that one of the biggest killers on our roads each year are sleepy drivers. It doesn’t matter whether someone falls asleep whilst driving for just a couple of seconds or longer.

Anything can happen when you’re driving. If you take your eyes off the road for just two seconds, a car or a pedestrian could cross your path without you knowing. That’s why the use of cell phones whilst driving is now banned in many states.

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Do you drive a lot in your car each day? If so, I’m sure you will have encountered times where fatigue started to set in. The trouble with those situations is that the more you fight your fatigue, the quicker you will start to fall asleep!

That’s why the purpose of today’s article is to ensure that you avoid such situations in the future. Here is what you need to know.

One of the most talked-about topics in the car world is gas mileage. Car makers around the world are often coming up with ways to introduce fuel-efficient vehicles to the market. Many of the world’s governments are also putting pressure on those car makers to do so.

Scores of nations around the world are keen to lower car tailpipe emissions. And one of the ways that can make this happen is to use less gas.

Some folks don’t have the money to buy new cars, and so they have to keep driving their gas guzzlers. They will have got told some gas mileage facts by various people at some point. But did you know that some of those “facts” are nothing more than a fallacy?

Photo obtained from Flickr (Image Credit)

Today I will share with you some surprising myths about gas mileage. Check them out below:

Myth: only small cars offer good gas mileage

Anyone that has listened to their physics teacher at high school will know about drag. Heavier cars place more load on engines, and so those engines will use more gas.

Small cars have always been lighter than bigger ones. But these days, car makers are using lightweight materials such as aluminum and carbon fiber in larger cars. In fact, many of the top-ten fuel-efficient cars of 2014 are medium-size to large cars!

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It’s easier than ever to start up a business in today’s economy. Maybe that’s why more and more people are doing it. Running your own business is a fun and challenging way to make money. It’s also a way to give yourself freedom from office 9-5 shifts and horrible bosses. You can run a business from your desk with your laptop. If you wanted, you could even run a business from your bed with your iPad!

That sort of life isn’t always possible, of course. It is easy for even the most technophobic individual to run a business today with modern software. That doesn’t mean that you can do everything from home. Modern startups tend to revolve around homemade goods and the personal touch. That’s what sets them apart from big businesses. You can’t always run an operation like that just from your home. You’ll have to get out there in the real world. That means getting the right car for your business.

It’s no secret that all modern cars on the road today don’t have silent cabins. The faster you drive your car, the more wind noise you hear. And if you’re stuck in traffic, you will doubtless hear noise from the world around you.

That can be quite annoying if you’re in a traffic jam, and you have to listen to some music you don’t like! On the other side of the spectrum, what happens if you want to listen to your favourite tunes at a loud volume?

Other road users stuck in the same traffic jam with you will have to listen to it too! There’s no point trying to shield them from your music by putting your windows up because they can still hear it!

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If you’re worried about hearing road noise, or other people hearing you inside your car, this blog post is for you! Here are some tips on how to soundproof your car’s interior.

Apply soundproofing mats to your car’s interior

The first thing you need to do is strip your car’s interior out. It can be quite a long and involved process, so make sure you have the time and space to do it.

You will need to remove your seats, carpets, and headlining. Some people will even remove their dashboard too; it’s up to you whether you wish to go that far!

Once your car’s cabin is shell-like, it’s time to get busy! I recommend applying some Dynamat soundproofing mats to all internal surfaces of your car. The floor, roof and door panels all need covering. I also recommend applying soundproofing mats to the bulkhead and in the boot (trunk) of your car too.

The soundproofing mats offer a soundproofing barrier between your car’s chassis and its interior.

Fit thicker carpets

The carpets that get installed in your car as standard are thin. Consider fitting thicker carpets to help absorb any noises from the rest of your car.

Now you can put your car’s interior back together again!

Upgrade your tyres

Here’s a great tip from Natalie at imperialcarsupermarkets.co.uk. If you hear a lot of road noise from your wheels at high speed, it will be because you have noisy tyres!

The chemicals used in the vulcanised rubber for tyres differ according to the make and model of tyres that you have. Some tyres are quieter than others. It’s worth doing some research into the subject, so that you can upgrade to some quieter tyres.

Tyres with soft compound rubber, such as Yokohama tyres, are often quiet. But the tradeoff is that they wear quicker. Still, if you’re in pursuit of a silent ride, you might not have any choice.

Tighten up and fix any loose components

A lot of the noises that you hear from your car are due to loose or broken components. For example, exhaust systems with worn rubber hangers can cause loud banging noises when you drive over bumps in the road.

If your mechanical knowledge is poor, get a mechanic to check your car for you. I hope this blog post has helped you today. Thanks for reading!

Everyone has their own preferences when it comes to buying cars. Yours might be different to mine, for instance. In the 16-odd years that I have been driving, I have owned all sorts of cars. My first car was a mk1 Volkswagen Golf, and I think that car might have started my affinity for German automobiles!

I now have a family, and so I need to buy a car that is suitable for transporting them with me. As I’ve developed a taste for luxury and refinement, I have decided that I am going to buy a BMW 5 Series for my next car.

Image via Flickr

You might be wondering why I’ve decided to go for that particular model. There are plenty of cheaper alternatives, granted. But there is something about the allure of the BMW 5 Series that I just can’t resist!

In this blog post, I’d like to share with you what I think the selling points of the BMW 5 Series are. But don’t blame me if you decide that you too would like to buy one!

Here are the simple steps to follow if you want to point the domain you purchased from Namecheap to your Blogger's blog. 

Outside of the obvious staples that are shelter and food, for many people, an automobile is the greatest monthly expense you will incur.  Granted, the convenience, and sometime critical need, of driving yourself around cannot be argued, but it comes with a hefty price.

Of course, the easiest way to save money on your car is simply not to use it. Walking, jogging and bicycling are not only free, but also good for your health. In many places, public transportation is a good option for the budget conscious. But, if you need to drive yourself, there are still ways to cut some corners.