[193346] in North American Network Operators' Group
Re: Bandwidth Savings
daemon@ATHENA.MIT.EDU (Fletcher Kittredge)
Wed Jan 11 23:51:40 2017
X-Original-To: nanog@nanog.org
In-Reply-To: <16704.1484161129@turing-police.cc.vt.edu>
From: Fletcher Kittredge <fkittred@gwi.net>
Date: Wed, 11 Jan 2017 14:36:52 -0500
To: Valdis.Kletnieks@vt.edu
Cc: NANOG list <nanog@nanog.org>
Errors-To: nanog-bounces@nanog.org
The problem with the local cache[s] is the bandwidth cost of populating the
cache and keeping it coherent can be greater than the bandwidth saved. From
your description, I would expect this to be the case so a local cache will
not help. Rule of thumb is if your downstream traffic is not at least
3gb/sec, you won't see a win from a cache. This problem can be mitigated if
you can find other large bandwidth consumers on the island and partner to
share a cache. Examples of potential partners would be your competitors,
universities, government organisations, etc. The savings can be
significant.
If there is a local peering point on the islands, this would be the best
place for shared caches. Sharing caches via an existing non-profit peering
organization or having a non-profit, educational organization, or the
government take the lead can lower the suspicion barrier and result in more
sign-ups.
On Wed, Jan 11, 2017 at 1:58 PM, <Valdis.Kletnieks@vt.edu> wrote:
> On Tue, 10 Jan 2017 23:08:45 -0500, Keenan Singh said:
>
> > do have a Layer 2 Circuit between the Island and Miami, I am seeing there
> > are WAN Accelerators where they would put a Server on either end and sort
> > of Compress and decompress the Traffic before it goes over the Layer 2, I
> > have never used this before, has any one here used anything like this,
> what
>
> Those will probably not help a lot with https: data, as a properly
> encrypted
> stream is very close to random bits and thus not very compressible.
>
> As others have noted, your best chances are getting content providers to
> give
> you a local cache of their most popular content.
>
--
Fletcher Kittredge
GWI
207-602-1134
www.gwi.net
