Category Archives: Technology

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.

Repairing your cracked damaged lcd screen display touch digitizer on Samsung Galaxy Note 3 N9005 using original genuine products

Phones these days get bigger and bigger, more complex and often easier to break. If you drop your phone there is always a chance of breaking your lcd screen display. The ideal solution is not to crack your display by dropping your phone but of course it can happen sometimes unfortunately. If you have the misfortune of breaking your screen then many people assume it will be an incredibly expensive job to repair your phone with an authorised Samsung authentic screen. This is simply not the case if you do a DIY do it yourself repair. Is this possible for the average joe is a very often asked question.. The answer in general is yes. There are many youtube videos and disassembly instructions to help you in the repair. It’s a simple case of unscrewing your phone and swapping over everything.

Why, you may be thinking is it important to use an original authentic display and not some Chinese copy screen? The answer is very simple, Chinese displays are of a poor quality which often breaks after a small period of time as they use previously damaged and repaired parts. What’s more they don’t have gorilla glass on the front of the display so they break incredibly easy and you end up paying double in the end. The answer is to buy an original display and get your phone fixed back to the factory standard as new. Black mist, blue dark grey, white or black edition makes no difference, all the displays are the same when sourced from Samsung.

Now you understand what you need and why, you are probably wondering where can you buy your new Samsung Galaxy Note 3 N9005 lcd screen display touch screen digitizer Note 3 Original Lcd Screen Display from at a cheap good price whilst making sure that you really are buying an authentic supplied by Samsung UK product? Well with 14 years of supplying genuine original displays your honest supplier of choice could be mobile phone parts who buy directly from Samsung. Good luck with your repair, buy original and save money with the cheapest repair getting it done properly the 1st time.

Make Your Voice Sessions Seem Top Notch

If you work with any kind of microphone for you to record your own voice, it’s likely that you’ve identified the small hisses plus popping noises which manifest while you are communicating. Whether you’re recording for your podcast, video clip, or for other reasons, you’re not likely to desire to have these sounds while you are talking. They are often distracting to audience members at best, plus they are most likely going to help make it tough for your audience members to comprehend every bit of what you’re really declaring. In its place, you ought to research acquiring a pop filter for your microphone.

The pop filter hooks up on your microphone and permits you to eliminate the different sounds the microphone generates whenever you talk in it. You are able to state nearly anything properly, particularly letters which may have trouble transferring to an audio recording properly. One particular option for a suitable pop filter that’s been very popular would be the Blue Yeti pop filter. This filter is inexpensive, however functions sufficiently for even experts to work with. An additional affordable but top quality choice is the Auphonix filter. Both of these are really simple to install right out of the package, so you’re able to have them working in only a couple of moments.

Experts prefer to have pop filters to make certain their voices seem professional and are very easy to hear and fully grasp. Even if you’re merely creating podcasts or movies for fun, you may want any podcasts or videos to seem top notch also. By getting a pop filter, you can make sure your audio seems great every time you record it. The audience will certainly enjoy the premium quality audio tracks, and you’ll probably generate repeat people listening. For a thing that has an extremely significant effect, a suitable pop filter doesn’t have to be extremely expensive or hard to use.

Should you be thinking about utilizing a pop filter to easily clean up all of the sounds your microphone creates whenever you record your voice, you might like to watch this video about a pop filter on YouTube. It is possible to discover everything you need to get going utilizing a pop filter right away. If you are done, go ahead and buy the pop filter of your choosing. You’ll be thankful you did once you hear just how crystal clear your own voice can appear right after it is recorded.

Staff members Improving Themselves For The Benefit Of Competition

During this time period, it is usually highly problematic for enterprises to help maintain or perhaps stay ahead of the very competition. Every single company has got their unique strategies meant for challenging and even strengthening the actual way they perform. Nonetheless, almost every small business owner hinges on the particular talents and dedication of their very own laborers. That said, if perhaps you’re an employee, it’s significant for you to comprehend what is required of you. Everyone will be able to click reference so as to learn how the huge level of competition is staying handled.

Being an staff member, you can easily count on the actual skills and experience you possessed when you started off working for your own boss. Almost all organizations assume their own staff members to truly develop and improve while keeping their particular current jobs. Regrettably, you can find a lot of employees that are blind to precisely what is definitely needed of them and are generally impacted greatly after the corporation progresses. It’s very critical for laborers to be able to continue in order to really carry the effort to learn additional skills and the way different procedures operate. It is possible to visit the site to help locate additional information pertaining to ways to advance and become better.

You can find a lot of ways individuals can easily considerably better their own skillsets and jobs. Among the most regular means is simply by rediscovering the reassurance of college. A number of individuals imagine that rediscovering the reassurance of college is without a doubt the very best or only way to get more expertise around a specialized area. However, not everyone gets the time or funds to follow a different college degree. Luckily, much more instructive companies are usually seeking to making it simpler just for professionals to learn and get ahead. Everyone will be able to look here to look at the companies which are making this unique dilemma important.

Far more instructive organizations happen to be supplying a great deal more solutions with respect to online learning. Nowadays, you can find a lot of organizations offering online courses that are based around helping specialists understand certain subjects or assignments. As opposed to traversing to a classroom every day, qualified people may spend their online time within the convenience of their own homes. People can easily try this web-site as a way to learn more about precisely what web based courses have to offer.

Many sectors carry on and progress, which means it’s dependent on personnel to keep up the tempo. Employees can find lots of solutions to enable them to match the needs of their unique managers. In case you’re a serious worker, take into account using online courses to give your main company just what they’re looking for.

Uncovering an Emergency Plumbing Professional Rapidly

Individuals often neglect to seek out an emergency plumber chicago until they desperately need a plumbing service, but this is a single task that should be addressed well before this problem arises. When water actually starts to enter into the home, each moment is very important as water is capable of doing a great deal of damage in a short time period. Just what should you ask of various plumbing contractors when researching them for this specific undertaking?

Inquire about the insurance a plumbing company carries. Respectable plumbing contractors maintain liability and worker’s comp policies as they want to be certain they’re covered if something does go wrong and a consumer’s residence is damaged or maybe a staff member is without a doubt injured. Contact the insurance service providers to make sure these insurance policies are still in effect.

Just how long would it really take for the plumbing company to show up? When you’ve got any domestic plumbing crisis, he / she must show up in the speediest time possible as water could be going into the home. The longer time this plumber takes, the greater amount of destruction that may be done.

Pay a visit to http://emergencyplumberchicago.blogspot.com/ for more information on choosing a plumbing technician, one capable of handling day-to-day and emergency situations easily. Your home is an investment of your foreseeable future. You want to make sure that any professional you will bring in the residence honors this all of the time and handles the problem as if he or she were actually taking care of their own home.