(I'm going to revive this thread because I'm looking for Co-Location or a dedicated server and I have some quesitons related to the past posts in this thread.)
For folks who are using dedicated hosting or co-location what type of bandwidth billing plans do you have? Basically, from my reading I see there are three basic ways that hosters charge for bandwidth.
1. Capped or valved bandwidth
2. Total Monthly transfer
3. 95th percentile
1. Capped bandwidth – you get bandwidth limited by the network. Typical limits are 1Mb/s or 1.5 Mb/s. You cannot go over this limit. Typically rated in Mega BITS per second. A 1.5 Mb/s rating is similar to a traditional T1 line.
2. Monthly transfer – you get a budget of total data that can be transferred per month. If you go over your budget you are charged extra for at a per GB rate. Rated in Giga BYTES per second. A typical rating is 1000 GB per month.
3. 95th percentile – in this type of plan they give you a bandwidth rate, but you are not capped. Your line speed can burst higher. They sample your bandwidth usage, eliminate the top 5% of the samples, and charge you for the bandwidth of the 95 percentile. There is an excellent explanation of this at http://www.webair.com/support/NEW_faq_billing.htm#whatis. According to the explanation, you normally get free upload bandwidth and your busiest 36 hours each month (5% of a month is 36 hours) are dropped. If you go over your budget you are charged extra at a per Mb/s rate.
So, how does one compare these plans? Here is my attempt. There are:
(30 days/month) * (24 hours/day) * (60 minutes/hour) * (60 seconds/minute) = 2,678,400 Seconds/Month
So, a 1 Mb/s capped bandwidth is equivalent to:
(1 Mb/s) * (2,678,400 Seconds/month) / (8 bits/byte) / (1000 G/M) = 334.8 GB / month Transfer
(not sure if they use 1024 G/M or not)
Bandwidth (mbps) Monthly transfer (GB)
0.5 167
1 335
1.5 502
2 670
2.5 837
3 1,004
Bandwidth (mbps) = Mega bits per second rate
Monthly transfer (GB) = Giga Bytes transferred each month
Michael's hosters have a similar chart - http://www.calpop.com/bandwidth.html so I think I'm on track.
If this is correct, why do so many plans have seemingly cheaper monthly transfers than bandwidth caps. Here is example, from I've seen many plans in the $200/month range with 1000 GB monthly transfer. I belive that is comparable to a 3 mbps capped plan. However, when I look at hosters that offer capped plans, they are incredibly expensive relative to Monthly Transfer plans. For example, at http://www.twshosting.com/services.php 3 mbps is $640/month just for bandwidth costs. At serverbeach.com they offer 2000 GB monthly transfers on their $200 packages, for $80 extra you can get a 10Mbps capped line which is equivilent to 3,350 GB monthly transfers. Other providers want $1500 per month just for a 10Mpbs capped connection. From the Icthus speed test it seems the serverbeach is capable of bursting to these high speeds.
I know there is no free lunch. Is there a catch in these monthrly transfer plans or cheaper bandwidth plans that I am missing? or is this just smart shopping and finding providers who are more competitve?