Hosting Domain
In this section may only know the technology used in multiple server hosting and how to maximize use ONEA € ™ s site and security and uptime
Now hosting the site to become a product where the competition came to a much higher level and CA € ™ is very difficult discriminate between hosting plans on the basis of basic plans, specifications and prices. Moreover, a number of options based on the cheapest price is not an idea better, rather than later proved to be very costly in terms of reliability and the potential loss of sales due to website downtime.
Choose the best of thousands of suppliers and retailers is a very scary, which is rather based on hit and trial method. Even if housing has become a commodity while choosing a new host should look for reliability.
However, in the heart of any host reliability is redundancy. Redundancy offers an alternative route in case a problem occurs. This is to ensure continuity of work in the most open and transparent as possible.
There are several casualties host, using redundant network connections. These are high-speed pipes that route data from the server to ONEA € ™ s Web browser. In contrast several redundant Web servers "are rare and expensive and therefore rarely used. They are expensive due to the use of expensive routing equipment, which has only used in mission critical applications for Fortune 500 companies.
There is another very neat but little known Domain Name Server (DNS) feature called "round robin" which allows the selection and provision of an IP address from a pool address in a DNS request arrives.
The Domain Name (DNS) database maps the host name to IP address. So instead of remembering a wide range of numbers (IP address) just type www.mydomain.com web browser, ONEA to reach € ™ s website.
Now, to find the DNS information throughout the market generally takes a minimum of 2 to 3 days. By So when you register or transfer a domain name is not immediately available to the person browsing the Web.
The delay has frustrated the benefits Security of accommodation ONEA € ™ s website on multiple servers, the site could be for a couple of days if things go wrong with a server. As a remedy must change to reflect the DNS server and the second must wait several days before the change was arrested in Internet routers.
There is another solution to the problem above, ie round robin DNS strategy solves this dilemma by mapping ONEA € ™ s domain name in more than one IP address.
Now we have to select the hosting companies using the technique of round robin DNS related with'failover followed.
Round Robin DNS switch startup process followed for a web hosting company setting ONEA € ™ s website in two or more independent web servers. Therefore, ONEA € ™ s domain name therefore have 2 or more IP addresses assigned.
Then the failover monitor watches ONEA € ™ s web server (s) by sending data to a specific URL and the search for a particular text in the results. Now when an error is returned by an IP address, extracts the IP address of the list. DNS points after ONEA € ™ s domain name address IP work / s
In userA If a ™ € s IP comes back online they are restored to the pool of intellectual property. This ensures effective and conserve security ONEA € ™ s online site, even if a Web server is down.
In this case, detection of failures and the average recovery time of a system is very low, with only 15 minutes. However, this period varies Sitea € ™ s speed and nature of the court and also hides how long other ISP (backup) ONEA € ™ s DNS information.
The time needed for caching ONEA ISP € ™ s information can be manipulated in the failure to monitor more to reduce the time to "live" (TTL) cache settings. These are the settings used by other Internet service providers to determine how long to cache ONEA € ™ s DNS information.
We must also into account the issue of frequency of the data is synchronized between the Web Server site. Now it is the responsibility of the host, is complicated when the databases and sessions user is concerned.
The most elegant solution to a multiple server host is a very expensive hardware based systems for monitoring failover this time, a virtual IP address to other ISPs, while behind the scenes juggling a number of unique IP addresses on different servers.
Of Thus, the whole question of PSI ONEA € ™ s cache information does not come into play.
Therefore, to obtain uptime of 99.99995%, without having to spend a large sum of money, the technology is already available and some failure monitoring property is now relatively cheap to implement.
About the Author:
How to host with the best web host? Web hosting blog provides one cents web hosting for hostgator and cheap domain names from godaddy domain registrar. You can read more about dedicated servers
Article Source: ArticlesBase.com – Web Hosting With Multiple Servers – Impact on a Website’s Uptime
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