Quote:
Originally posted by jaguar:
Can someone tell me why DanielP said a T-1 wouldnt get me more than 400gig? I guess Im not quite understanding the concept. If you had 1.54mb connection and just absolutely filled (I realize you wouldnt want that) then you would move 1.5mb/sec * 60 sec. in a min. * 60 min. in an hour * 24hrs a day * 30 days amonth = pushes to about 4000gig not 400. Am I doing something wrong?
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The following is a very complex series of mathematics. Note that
this is not my work - I am
not this good at math
This formula was worked out by a friend of mine, and I am re-posting it here for your enjoyment.
If you'd rather skip all the math, just scroll to the bottom and the conclusions are there.
The Math:
1,000,000 bits = 1 megabit
8 bits = 1 byte
1,048,576 bytes = 1 Megabyte
(220 is the closest power of 2 to one million, so that is how they came up with this number)
1024 Megabytes = 1 Gigabyte
take:
1 byte / 8 bits * 1,000,000 bits / 1 megabit = 125,000 bytes / 1 megabit
125,000 bytes / 1 megabit * 1 megabyte / 1,048,576 Bytes = .119 megabytes / 1 megabit
The above two equations are zero-sum. In other words, because 1 byte = 8 bits, you could always cancel the whole thing out and call it zero. This means that even though it looks like I am dividing .119 megabytes by 1 megabit, I'm really saying they're equal because they could cancel each other out.
Here is where we bring time into the picture:
.119 megabytes / 1 second * 3600 seconds / 1 hour = 428.4 megabytes / hour
428.4 megabytes / hour * 24 hours / 1 day = 10281.6 megabytes / 1 day
10,281.6 megabytes / day * 1 gigabyte / 1024 megabytes = 10.04 GB / day
In other words, 1 megabit per second is 10.04 gigabytes per day. Because there are an uneven number of days in any given month, I'd just take this figure per megabit and multiply it by the number of megabits and the number of days. All this is is multiplying fractions with variables and cross canceling. It gets confusing because a "megabyte" represents "something." If you just handle it as an "x" that can be cancelled out by the same variable on the other side of a fraction or equation, it's easy.
End Math
Conclusion: 1 megabit per second is 10.04 GB per day. Therefore, 1.5 megabits per second is 15.06 GB per day.
Assuming an average 30-day month, then a 1.5 megabits per second T-1 line will process 451.8 GB per month if fully saturated.
Hopefully this is helpful. Note that in reality a T-1 line is actually 1.54 megabits per second, not 1.5 megabits per second - but since the math above computes to 1 megabit per second, you can apply the 10.04 GB per day per mbps to any amount you want and it should be correct.
Good luck,
Jason
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Jason Ellis, CEO
Hosting Solutions, Inc.
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[This message has been edited by Jason Ellis (edited 08-03-2000).]
[This message has been edited by Jason Ellis (edited 08-03-2000).]
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