As More Servers Hosting Uptime Impact on Your Web Pages
Placed in Web Hosting Server | January 13th, 2010
This article describes the technology behind multiple server hosting and how you can use to maximize your site’s security and availability
Web hosting has become essentially a commodity. There is very little distinguishing one hosting company to the next. Basic schemes and functionality are the same and price is no longer a real critical factor. In fact, the selection of a host on the best available rates can be more costly in the long term in terms of reliability issues and the potential loss of sales due to downtime caused site.
Selecting a host from thousands of suppliers and resellers can be a very difficult task, which is in a hit and miss approach in May. But although the accommodation in May has become a commodity, a special feature that you are always on the lookout for reliability.
At the heart of the reliability of a hosting company is redundancy. This ensures that if a problem exists at a given moment, there is an alternative which ensures continuity of direct and transparent as possible.
Most hosts of redundant network connections. These are the high speed pipes that route data from the server to your web browser. But several redundant Web servers “are extremely rare and very expensive, expensive routing equipment, which had been previously used in critical applications for Fortune 500 companies.
Function However, a beautiful but little known Domain Name Server (DNS) with the name “Round Robin” allows selection and delivery of a specific IP address from a pool of addresses when a request DNS arrives.
To understand how this with a reliable server, it is important to remember that the name server (DNS) maps database host name to their IP address. Instead of using a difficult series of numbers (IP address), it passes right in your web browser www.yourdomain.com not forget your website.
Now we have generally spread at least 2 to 3 days or the words “DNS information disseminated on the Internet. Therefore, when you register or transfer a domain name, it is not immediately accessible to anyone surfing the web.
This delay has safety benefits of hosting your site on multiple servers to a halt, just like your site a few days if something went wrong with a server. You do not take into account your DNS change to your second server and wait days before the change was included in the routers on the Internet.
However, the resolution of the round-robin DNS strategy of this predicament, by mapping your domain name in more than one IP address.
Select hosting companies now employ the DNS round-robin technique in conjunction with’failover monitoring.
Round Robin DNS failover monitoring process starts with a web hosting company setting up your site on two or more independent web servers (preferably with different IP blocks assigned to them). Your domain name is assigned so that 2 or more IP addresses.
Then the failover monitor watches your web server (s) by sending data to a URL you specify and search for specific text in the results. If the system detects that your IP address, an error message back, and the other not, it pulls the IP address of the list. The DNS issues, then your domain name to the IP address of the working class / s.
If one of your IPs are online again, returned to the pool of IP. This effectively and safely keeps your site online? Even if a server crashes on your website.
The detection of failures, and the average recovery time with a system like this can be as low as 15 minutes. This time depends on the speed of your site and the nature of the error and how long other ISP’s cache (save) your DNS information.
The time for caching your ISP other information can be made live in the failover monitor by lowering the time “to” (TTL) cache settings to be changed. These are the settings that other ISPs will use to determine how long you have empty your DNS information.
Of course, you must, to the question, how many times the data transport between servers your website is synchronized. It is the responsibility of the host, and this May is complicated when the databases and user sessions are affected.
Switching equipment very expensive monitoring systems that point virtual IP address with any other ISP, while behind the scenes juggling a number of unique IP addresses on different servers, of course, is “elegant” solution for multi-server hosting.
In this way, the whole issue of “caching” information the ISP will not come into play.
Therefore, for the site who really have 99.99995% uptime, without huge expenditures of money, but the technology is already available and certain proprietary failure monitoring is now relatively inexpensive to implement.
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