In the recent past, there has been an increase in the number of companies using DNS failover systems, and this could be attributed to the benefits of using this system including its ease of deploying and management and it being quite inexpensive. However, before you can make the important decision to use a DNS failover service, it is critical for you to determine whether the system is suitable for your organization and whether it would meet the needs of your organization. You can only know if this service is suitable by knowing the different features and uses of this service.
One of the most common uses of a DNS failover service is the system being able to control web traffic. Use of this service to control web traffic is beneficial since even as the server goes down, the other servers available can take over the job and this will lead to there being consistent traffic. This is normally possible due to the different servers having varied IP addresses even if the servers may be located in the same place.
One of the most important features of a DNS failover service is the monitoring aspect. The more advanced the monitoring feature is set, the better. It is usually very critical for this system to have a suitable monitoring feature since it will be able to detect any outages. This monitoring feature will in most cases have an alerting system that can send alerts via email, SMS or even both. These alerts are usually critical in ensuring that the appropriate steps are taken.
One of the most critical features that a DNS failover system needs to have is that it has to be flexible when routing traffic. In most cases, the most used traffic routing configurations are usually sequential. The good thing about having routing configurations that are sequential is that you can decide the order that you would want the traffic to be routed. This means that in case the highest priority server goes down for whatever reason, then traffic will be directed to the second server. This will lead to the traffic being evenly distributed among the different servers.
It is usually very important for any DNS failover system that will prevent the announcement that the IP address of the server is back online. It would not be always necessary to have a feature preventing re-announcement when the server’s IP address is back online; for instance, if you have a server that usually offers static web content, then re-announcement may not be one of your biggest problems. However, if you have a database server that usually needs synchronization when it goes back online, the you should consider it critical to have this specific feature that will prevent any announcement when the server goes online.
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