Webfarms: The Only Way To Host!Networks can be configured to be so incredibly redundant now - for reasonable prices - that there is no excuse for a data center not to achieve five nines (99.999%) of availability.
But what about the servers and applications? Why spend so much time up front configuring the network to make sure it doesn't fail, and then deploy an application to a single server?
Sure, there are ways to make sure individual servers have some redundancy to minimize failures -- things like RAID1, RAID5, or RAID10 (redundant array of inexpensive disks) which will protect against a disk drive failure (and I highly recommend this type of configuration for all production servers - and preferably the use of hardware RAID vs. software RAID). But what happens if a file gets corrupt on the RAID array? Or a recent configuration change brings the application down? Or a newly released patch conflicts with other settings and causes problems? Well, in these situations the server will go down and the application(s) hosted on that server will be offline.
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Bandwidth ExplainedBandwidth Explained by Breal Web Design
What is Bandwidth and Data Transfer?
Simply put, bandwidth and data transfer are synonomous, referring to the amount of data sent to and from visitors and your website. It is calculated by the size of your web page and includes all scripting and images on a page. For example, if you have a page totalling 20KB in file size, then when a visitor loads that page on their browser, they are receiving 20KB of data.
This means to calculate bandwidth, you need to consider a) the size of your pages (or website) b) the number of visitors to your website c) the kind of files you offer your visitors.
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