Re: [PLUG] bandwidth calcuations

["Brian Stempin" <brian.stempin@gmail.com>]

> A) how can you calculate this so you don't get a big surprise bill? I
> wanted to use my current T1 to baseline. So if I were to peak my T1
> 100% all month, how much usage would that be. I have a a pretty good
> idea of how much traffic I have now - so maybe a could figure out how
> much i'll need for growth.

If this is the route you want to go, I would recommend purchasing a connection that charges based on bandwidth and not transfer.  I would also recommend that you make doubly sure that there is no cap and no "burst" bandwidth.  These both lead to billing surprises if you go over.  

If you want burst bandwidth, then you have to ask the prospective colo how to calculate the usage.  Most use the 95/5 rule.  Here is a link that can explain this rule better than I can:  
http://en.wikipedia.org/wiki/Burstable_billing

If you're stuck and you can't afford an uncapped connection, here is how to calculate the amount of transfer you'd need to run a connection 24/7:

Transfer per month = 
 (30 (days) * 24 (hrs) *  3600 (seconds in an hour) * 1.5Mb (connection speed [note that this is in megabits]) / 8 (because there are 8 bits in a byte)) = number of MB (mega
bytes)
Using these calculations, a 1.5 Mb connection could use up 486000 MB in 30 days, or 474.6 GB.

> B) who is your colo with? I'm investigating providers 


My company uses USLec.  I can't say too much for them...we purchased
the space, and we don't use it :-/.  I can thank my predecessor for
that one.

On 5/24/07, W. Chris Shank <shankwc@acetechgroup.com> wrote:

So with a T1, if it was maxed my montly usage would be 463,485Mb? that doesn't sound right to me.

----- Original Message -----
From: Malcolm J Harwood < mjhlists-plug-20060801@liminalflux.net>
To: Philadelphia Linux User's Group Discussion List < plug@lists.phillylinux.org>
Sent: Thursday, May 24, 2007 8:30:19 AM GMT-0500
Subject: Re: [PLUG] bandwidth calcuations

On Wednesday 23 May 2007, W. Chris Shank wrote:

> I'm considering moving some servers to a co-location facilities and most
> charge based on bandwidth usage. I'd like to use my existing pipe a a
> barometer to figure what my maximum usage could be (assuming I maxed my
> line 24x7). Can anyone help me with a formula for calculating bandwidth
> usage like this?

Well, what's your existing pipe? Your ISP probably specifies it in bits per
second. In which case:

monthly use (Megabytes)= (bits-per-second/8) * 60 * 60 * 24 * 30 / 1048576

___________________________________________________________________________
Philadelphia Linux Users Group         --         http://www.phillylinux.org
Announcements - http://lists.phillylinux.org/mailman/listinfo/plug-announce
General Discussion  --   http://lists.phillylinux.org/mailman/listinfo/plug

--
W. Chris Shank
ACE Technology Group, LLC
www.myremoteITdept.com
(610) 640-4223

--------------------------------
Security Note: To protect against computer viruses, 
e-mail programs may prevent sending or receiving 
certain types of file attachments. Check your e-mail 
security settings to determine how attachments are 
handled. 

___________________________________________________________________________
Philadelphia Linux Users Group         --         http://www.phillylinux.org
Announcements - http://lists.phillylinux.org/mailman/listinfo/plug-announce
General Discussion  --   http://lists.phillylinux.org/mailman/listinfo/plug

___________________________________________________________________________
Philadelphia Linux Users Group         --        http://www.phillylinux.org
Announcements - http://lists.phillylinux.org/mailman/listinfo/plug-announce
General Discussion  --   http://lists.phillylinux.org/mailman/listinfo/plug