A DNS Failover Service – Is it right for you?

Over the years, DNS Failover has become a very popular service primarily due to the fact that it is relatively inexpensive and fairly easy to deploy and manage. But is it the right solution for your organization? In this article, we’ll outline what DNS failover is and provide an overview of the benefits and appropriate uses for this type of technology.

What is DNS Failover?

First, we must define what DNS failover is before trying to understand whether or not it offers benefits. Simply put, DNS failover is an add-on feature of a DNS Service and is a system that consists of two main components. The first component monitors servers or devices behind IP addresses in an effort to determine their state, e.g. up or down. Second, it uses the server state information to automatically update the IP address associated with a particular DNS record, such as an ‘A’ record, ‘AAAA’ record or otherwise. It may consist of other components designed to deliver email or SMS alerts in the event that an outage is detected or changes are made, but any successful DNS Failover solution must consist of at least the first two essential elements.

Common Applications for DNS Failover

So now that we know what DNS Failover is, what is the most common use for it and what applications can benefit from this method of automating DNS updates?

Perhaps the most obvious use that comes to mind is to control web traffic. Failing over between redundant web servers is a very common implementation, and is probably the most frequently used application. From the failover system’s perspective, it really doesn’t matter where the two IP addresses are, so long as they are different. So because of this, it could be used to failover between two different servers at the same datacenter, servers at different datacenters (even across the globe) or it could be even the same server with two different network connections, each having their own IP address, for example a server at a corporate office with one IP on each of two different T1 lines.

Naturally, what can be done for web servers can also be done for mail servers, FTP servers, streaming media servers or VoIP servers, just to name a few. Essentially, if it has an IP address and can be monitored externally, DNS Failover can route traffic to it when it is up, and redirect to another server when it is down.

Common Features

Most well thought out DNS Failover implementations should have at least a few basic features. First, and probably paramount to failover success, is monitoring. The more advanced the monitoring feature-set, the better. This allows you to detect outages as accurately as possible. At a minimum, we would expect functionality to fine-tune the monitors and to run them from multiple geographic locations in order to create an accurate picture for when failover actually needs to occur. Of course, it should probably go without saying that the monitoring and alerting functionality should be able to send alerts via email, SMS or both.

Another important feature, in our opinion, is some flexibility in how traffic is routed. The most common traffic routing configurations are sequential or round-robin. Sequential allows you to list servers in the order you want traffic to be delivered so that if the server with a priority of 1 goes down, it sends traffic to the server with a priority of 2 and so forth. Round-robin publishes a DNS record for every one of the active and available servers so that traffic is distributed amongst them as evenly as possible. When one goes down or becomes otherwise unavailable, it is simply removed from the pool allowing traffic to continue being distributed amongst the remaining server(s).

And finally, you’ll probably want a feature that prevents the automatic re-announcement of a server’s IP address when it comes back online. In the case of a server providing static web content, re-adding may not pose a problem, but in the case of a database server requiring resynchronization, this little feature is critical.

Limitations of DNS Failover

The biggest limitation when using DNS Failover for application switching is the ability to quickly detect an outage and make a change that will actually propagate the Internet in relatively short order to seamlessly redirect users, both current and future. Even the best DNS Failover solutions that accurately detect an outage and update DNS quickly and accurately still leave customers at the mercy of a well known problem called caching. This is an extremely tough issue to resolve because it is not within the DNS Failover service providers control.

Caching issues are created when ISPs ignore TTL values, or they can be caused by something as simple as default Internet browser settings which are configured to cache images in order to improve page load times. The shortest compliant TTL value is 60 seconds, and for some ISPs this is simply too short. AOL, for example, is known to ignore low TTL values and substitute them with something much higher, say 15 minutes, for example. But other than those ISPs who ignore TTL values, a 60 second setting in theory *should* propagate the Internet relatively quickly.

Is there anything better?

Depending on your application, Cloud Load Balancing might be a better fit. That, of course, should be dictated by your specific requirements for uptime, flexibility for balancing traffic among servers and how critical the need to avoid caching created by TTL avoidance or just plain old browser settings. Cloud Load Balancing is similar in design, but offers extremely powerful traffic management solutions similar to hardware load balancers (except on a global scale) for serious online organizations.

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When Money Is Involved In The Diet Plan

When it comes down to it, losing weight is all about structure. Very few people can lose weight without having some sort of structure in their life, especially if they have issue with things like will-power, and following through with exercise. This is one of the reasons why so many people out there spend money on diet programs, especially those that include meetings and weigh-ins. By having a structure that includes public adulation (and let’s face it: pressure), most people are better apt to follow through with their dieting. Of course, while you should be willing to pay for your diet program, you shouldn’t have to overpay for it. While there is going to always be a debate amongst dieters between Nutrisystem vs Jenny Craig, the truth is that Jenny Craig is always going to be the more expensive option.

How much more expensive is Jenny Craig? The average cost for a month of a Jenny Craig program is $500-650, while Nutrisystem is $250-350. Does this mean that either one of them are necessarily “better” options than the other? Ultimately, it’s going to depend on what is right for you. If you read a lot of the Jenny Craig reviews online, you are going to get the feeling that the company is driven by money, which may catch some people off guard. While, truthfully, all companies are ultimately driven by profit, reading the reviews you will get an idea that Jenny Craig may not be hiding that drive so well.

This isn’t to say that every one of the Nutrisystem reviews you read are going to be positive. There are going to be some negative reviews in there that you are going to have to weigh. All in all, though, you need to make the decision based on your own needs, not the needs of those people who are writing reviews. If you have the money and don’t mind paying it, you can go with the more expensive option; if not, go with something that you can afford. You are ultimately looking for something that you know you can follow through with.

Article about Drug Rehab

Drug and alcohol addiction is fast becoming a problem for many individuals and families alike. Most are under the impression that drug and alcohol dependency is only reserved for people who are perhaps less fortunate, with little motivation or ambition. This however, is not true. Drug and alcohol abuse can affect anyone regardless of their social standing. It doesn’t matter who you are, where you live, or how affluent you are, drug and alcohol addiction can affect anyone at any time.

A high pressure job can lead to problems with addiction; however, one wouldn’t expect a doctor to succumb to the temptation of alcohol or drugs. Knowing all there is to know on the medical front about health implications and the possibility of addiction, you would assume that doctors have a moralistic view that simply wouldn’t allow them to even consider taking substances, let alone become addicted to drugs or alcohol so that they become highly dependent.
Doctors may find asking for help or admitting they have dependency issues a little more problematic. Having a certain amount of expectation placed upon them, doctors are supposed to be upstanding and dependable citizens, however, they are human and experience emotional issues that can lead to addiction just like everyone else.

The first thing a doctor should do when searching for help is to actually see another doctor. It can be a colleague or friend, but it can also be a doctor that is part of a private clinic which may feel a little more comfortable. As a doctor with a drug or alcohol addiction, you will more than likely need to attend a rehabilitation center to help you deal with your substance dependency issues. There are many programs available within private rehabilitation centers that can be tailored specifically to your individual needs. It is usually the case that a recovery program is devised for an individual based on the type of addiction you have. Treatments and rehabilitation recovery program for doctors deal with everything from the psychological and emotional issues that have led to the addiction to a full scale plan that will help you and your family come to terms with these issues and lead you on the right path to a full and long term recovery.

With thousands of rehabilitation centers across the country, it can be difficult to find the right kind of clinic for you. Each clinic has developed their own unique treatments to deal with all aspects of addiction. Some offer extreme detox programs which don’t allow you to host visits from family during the rehabilitation process, while others offer a more supportive, family orientated style of recovery which even allow you to have the company of your own pet as part of your treatment.

Doctors can fall foul to drug and alcohol addiction just like anyone else, but regardless of who you are there is help and treatments to help you on the road to a full and healthy recovery.

Bmw Sports Cars

BMW or Bayerische Motoren Werke has long been conceived all over the world as “The Ultimate Driving Machine.” The company has proven this statement true in the past years.

The current models of BMW sports car will attest to that statement.

Here are some of the current models of BMW, with their corresponding characteristics.

-BMW M3 2006

Engine specifications:

BMW M3 has an in-line, 3.2 liter capacity engine with a compression ratio of 11.5. It has four valves per cylinder. It promises to deliver 248 KW power and 333 HP at 7900 rpm (SAE).

Brake Features:

The car has electronic brake distribution, brake assist system, four disk brakes with ventilated disks, cornering brake control, and four-wheel ABS.

Handling Features:

BMW M3 is equipped with stability control, immobilizer and limited slip differentia at the rear. The ABS and engine management control the electronic traction.

Aerodynamics Exterior features:

The car has 0.35 drag coefficient, body side moldings, and 3771 lbs. curb weight.

-BMW M5 2006

Engine specifications:

The BMW M5 2006 car has a V10, and 3.2 liter capacity engine with a compression ratio of 12. It has four valves per cylinder. It promises to deliver 373 KW power and 500 HP at 7750 rpm (SAE).

Brake Features:

The car has brake assist system, four disk brakes with ventilated disks, electronic brake distribution, cornering brake control, and four-wheel ABS.

Handling Features:

The BMW M5 is equipped with stability control, immobilizer and limited slip differentia at the rear. The ABS and engine management control the electronic traction. It is also equipped with a responsive suspension.

Aerodynamics Exterior features:

The car has 0.31 drag coefficient and 4012 lbs. curb weight.

-BMW 6-Series

Engine specifications:

The BMW M5 2006 has a V8, 4.8 liter capacity engine with a compression ratio of 10.5. It has four valves per cylinder. It promises to deliver 268 KW power and 360 HP at 6300 rpm (SAE).

Brake Features

The car has electronic brake distribution, brake assist system, four disk brakes with ventilated disks, cornering brake control, and four-wheel ABS.

Handling Features:

BMW M3 car is equipped with stability control, immobilizer and limited slip differentia at the rear. The ABS and engine management control the electronic traction. It is also equipped with an adjustable responsive suspension.

Aerodynamics Exterior features:

The car has 0.3 drag coefficient, and 3814 lbs. curb weight.

With all the features these cars have, BMW truly is the “Ultimate Driving Machine.”

The Porsche Carrera GT is a racecar

Unofficially, the Porsche Carrera GT is a racecar, a racecar built for the street. What makes it a racecar is not necessarily the huge power produced by its V10 engine or the carbon fiber construction that keeps everything very lightweight – although these features surely make it a fast car. It’s more the sum of its parts that make this car worth every bit of its $440,000 price tag.

The Porsche Carrera GT was introduced as a 2004 model and until 2005 there were already a few changes in order to make the Carrera GT the new Porsche super car. These were minor updates in order to make it a little more street friendly. Between the supplemental bar hoops is now mounted a glass screen. The seats height is adjusted along with the additional bolstering in the thigh area. The Carrera GT is easy recognizable, as it’s a low, sleek, lightweight roadster, very beautiful on the outside as it is on the inside. Two removable panels that can be stored in the front trunk make the foul weather protection available.

The car has unique features, among which are: 5.7 liter, 605 horsepower V10 engine, monocoque chassis with Porsche-patented engine and transmission mounts made of carbon-reinforced plastic and the first use of a ceramic composite clutch in a production car. A very important aspect is that The Carrera is safe and stable at speeds up to 205 mph, thanks to its aerodynamic and race-bred suspension package.

The design of the suspension is so sophisticated that the shape of its components improves the Carrera GT`s aerodynamics. The designers used lightweight materials such as magnesium for the car’s substantial wheels and the frames of its special sport seats, the result being a faster and safer car. To prove so, The Carrera GT accelerates from a standing start to 62 mph (100km/h) in only 3.9 seconds reaches 100 mph (160 km/h) in less than seven seconds, 125 mph (200 km/h) in less than 10 seconds, and can achieve a top test-track speed of 205 mph (330 km/h).

What makes this car have these impressive results is it’s 5.5 liter, normally aspirated V10 engine for racing created in the development center in Weissach, Germany. That engine’s bores have been enlarged to displace 5.7 liters in the Carrera GT. It has a very low center of gravity, a 68-degree V angle and four valves-per-cylinder heads. Since the block, crankshaft and camshafts are all made of light alloys, the engine weights only 472 pounds (214 kg).

To stop this ‘monster” Porsche`s team used a high-tech braking system. Developed for demanding motorsports applications, ceramic brakes are the first to work for on-road use. The massive 15 inch ventilated discs and six-piston calipers have the amazing capacity of bringing the car to a sure and safe stop, matched only by the stunning acceleration of Carrera GT.

Porsche Carrera GT is definitely a exotic appearance, a car that can do it all: fascinate you with its good looks,   astound you with its performance and abilities on the race track.

Four Bodybuilding Supplements You Might Want to Try

As people become more aware of the need for physical fitness, more men and women are turning to weight lifting as a way to build muscles and trim the body. In many cases, a supplement can help trim the fat, provide needed energy, or boost muscle mass. For anyone looking to build or tone muscles, here are four supplements that are worth trying.

CNP Pro Flapjack Bars

Not everyone likes their boost in the form of a powder or drink, and these convenient bars are a great on-the-go energy snack. Packed with proteins and healthy carbs, the Pro Flapjack Bar is the perfect pre-workout snack. Fitness experts believe that a high-energy, nutritious snack before a workout helps your body get the most out of exercise.

Mutant Mass

When it comes to USN, Mutant Mass is the beast. The supplement is chocked full of protein and high-energy carbs, but the strong formula is only meant for those with serious muscles in mind. In order to unlock the power of this formula, you need to be ready for a rigid workout schedule.

Reflex One Stop Extreme

This shake system provides a one-stop shop for all your Sports Supplements needs. One serving includes over 550 calories, 55 grams of protein, 72 grams of carbohydrates, and 5 grams of creatine. This is a great supplement for someone who is training for extreme sports or marathons, or for anyone who hits the gym hard for a couple of hours every day.

Maximuscle Weight Loss Pack

Not everyone wants to bulk up. For those looking to drop a few pounds while toning muscles, the complete weight loss program included in this pack may help. The pack includes protein bars, diet capsules, and shake powder. As a best-selling weight loss supplement, Maximuscle combines nutrition with your workout program in order to shed pounds in a safe manner. You will find yourself with extra energy and feeling great when you use these products along with a healthy cycle of meals and exercise.

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Car Show Basic

Have you ever wondered what the point of a car show is? After all, what could possibly be so much fun about accumulating so many cars in a single area? Most people do not realize, but car shows are about so much more than simply lining up a bunch of beautiful cars for people to admire. There are typically contests that are involved in the shows as well with awards handed out in several categories including Best Overall, and often Best Restoration and other similar categories.

For those who are bringing cars to the show, it is a chance to show off the handiwork that they have put into the car, and also a chance to see how others feel about their work. Of course, some people are lucky and walk away from almost every show they enter with a prize, but generally this does not happen. Most people put months and even years of work into a car before they leave a show with a prize.

This can translate into thousands of dollars worth of work often. Dog shows are for dog lovers, and car shows are the equivalent but based around cars. Because of this the competition can sometimes be quite stiff, but in general terms they are still a ton of fun to watch. There is hardly ever a time when someone is unable to find something to do at a car show that does not interest them.

From the dozens to hundreds of cars that are entered there are only a small handful that will leave with a prize or a place as one of the top cars. The fun of looking around and seeing who wins, combined with seeing the beautiful cars, and also participating in some of the other activities that are going on make it a great way to spend the weekend. There are many people who spend all of their weekends looking around for a car show to attend.

Not everyone who is dedicated to attending car shows actually have cars. Some of the people who enjoy car shows the most do not have a car, and may not even have an interested in getting a car that would be able to enter the car show. Deciding if you are interested in attending the car show is often dependent on your personality but realizing that there is much more to the car show than simply walking the rows and rows of cars is often enough to catch many people’s interest.

While car shows are not always considered a sport, they often help to foster great sportsmanship amongst competitors and can be a great way to share experiences and learn plenty about cars. If you are interested in getting involved in the car shows then sometimes attending a few shows before you enter can be a great way to learn as much as possible about what the judges are typically looking for so that you can improve your vehicle to improve your overall chances of walking away as a winner.

Just think in a single location there are so many gorgeous cars that are all beautifully restored and you can spend all of the time you want looking and dreaming about each one. There are so many people to meet as well that you can have a lot of fun and you may discover that car shows are your favorite weekend activity that you never knew about.

Car Rental Safety

Urgency always calls for haste and therefore, one should thoroughly check the car before renting it for any specific purpose.

If the car is not properly checked, there are chances the car may break down after a few miles and may jeopardize your safety. Besides this, your vacation will not work out the way you wanted it to.

You might spend all your time and money on the repairs and maintenance. The interior and the exterior of the car should be examined accurately.

The main things to be checked are the lights, wipers, radio, cruise control and signals before signing the papers with the rental company.

A test drive would help a big deal in understanding the smoothness factor that one longs for when planning long tours.

It is always better to be safe than sorry and hence, the rented car’s insurance is a very important aspect. By opting in for insurance, the car rental may not be all that cheap.

However, in case there is a sudden breakdown, you are certainly endowed with a good amount of compensation to cover repairs and maintenance costs.

Answers to questions pertaining car rental insurance can be found on company brochures that indicate the factors involved in car rental insurance.

To avoid any problems, you should clearly understand the rental car insurance procedure and what type of coverage does it provide. It is also favorable to understand the nature and make of the car.

All of these factors should be considered before deciding to rent a car. These factors are important for the safety of you and your family.

Hybrid Car Models Are The Best

Since its first production commercially in the 1990’s, the number of hybrid cars models had swollen into gargantuan volumes.

In 2004, some 80,000 hybrid vehicles (cars and trucks included) were sold, reaching a some 17 million USD in total sales, in the US alone. In 2005, about 200,000 hybrids cars, with different models, were sold. This singular sale represented the total of 1.2 percent of all cars sold in the US, in the same year. Some authorities believe that that by 2007, some 400,000 hybrid vehicles will be sold in the US.

The Toyota Prius, however, rules supreme over other hybrid car models. With 107,897 units sold for the year 2005, which represented 52% of the total hybrid market, Toyota Prius is currently unbeatable. The next most popular hybrid was the Honda Civic Hybrid, which sold over 25,000 vehicles.

Here’s a look at different models of hybrid cars

2005 Honda Civic Hybrid. This is a 4 door/5 seat sedan, with automatic or manual CVT for its transmission. MPG is 47city/ 48 hwy, while the range per fillup is 650 miles. Base on 2005 pricing, this model is worth $19,800 per unit in the US.

This model boasts of such features as full climate control, a Micron air filtration, and built with an Anti-Lock Braking System (ABS). It has Cruise Control, Power windows, mirrors and door locks, together with AM/FM/CD audio system with 4 speakers.

2005 Honda Accord Hybrid. This one is4 door and 5 seat midsize sedan. Transmission is 5-speed automatic, while the mileage (mpg) is 29 city/ 37 hwy. Range per fillup is 600 miles (1000 km). Based on the 2005 Base Retail Price, this car worth $30,000 in the US.

This hybrid car model’s notable features are its unique hybrid air-conditioning system, Anti-Lock Braking System (ABS), Grade logic control, a Driver’s seat with 8-way power adjustment, and a Satellite-linked navigation system. The last feature, though, is optional for the owner.

Another hybrid car model from Honda that made it to the list is its 2005 Insight. It has 3 doors and two seat coupe. Transmission is CVT automatic or 5-speed manual. Mileage (mpg) is 60 city/ 70 hwy (3.2L/100km), while its range per fillup is 600 miles (1000 km).

Retail price is pegged at 2003 Price: $19,080 – $21,280 in the US.

In terms of features, this hybrid car model has full climate control, a CFC-Free Air Conditioning, with Anti-Lock Braking System (ABS), and an Electronic instrument display. It also has a tachometer, power windows and mirrors; door locks; and AM/FM Stereo/Cassette System.

2005 Toyota Prius. Of course, the first among the hybrid car models to successfully reached the US market is included among the best. This one is 4 door and a 5 seat sedan with a liftback. Transmission is CVT automatic, while mileage (mpg) is 60 city/ 51 hwy. range per fillup is 566 miles. Based on the 2005 Base Retail Price, this model is $20,875 per unit, in the US.

This one has a full climate control, a CFC-Free Air Conditioning and an Anti-Lock Braking System (ABS). Also comes with central instrument display, LCD energy monitor, power windows and mirrors, door locks with deluxe AM/FM ETR/Cassette with 4 speakers.

2005 Ford Escape Hybrid. The Ford answer with Japanese cars is this 4 door/5 seat SUV unit. Transmission is CVT automatic with a mileage (city/hwy) of 2wd 31/36 | 4wd 29/33. Range per fillup is 400 to 600 miles. It has manual Air Conditioning, with Anti-Lock Braking System (ABS), a roof rack with 2 horizontal bars and also comes with power windows and mirrors, door locks, and AM/FM stereo with 6-disc in-dash CD system. The price based on 2005 $26,970

2006 Lexus RX 400h. This hybrid car model is a 4 door/5 seat SUV unit. Transmission is ECVT automatic, a 31city/ 27hwy mileage (mpg), and the range per fillup is 450 to 530 miles. The retail price is $48,500

This one has dual-zone automatic climate control, and an exclusive Lexus 8-speaker sound system, 6-disk CD, power tilt and slide moon roof, transceiver to operate garage doors, lights, and part-time all-wheel drive (AWD).

The 2005 hybrid car models include some of the best and ingenious ones. Car experts believe that other models in the future will just take their improvement from this most productive year in the history of hybrid cars.