----- [email protected] wrote: > -----Original Message----- > From: John Cheng <[email protected]> > Date: Fri, 24 Dec 2010 18:49:54 > To: Leif Hedstrom<[email protected]> > Reply-To: [email protected] > Cc: <[email protected]> > Subject: Re: Usage of Traffic Server with a CDN > > >>> ----- "John Cheng"<[email protected]> wrote: > >>> > >>>> I am exploring the role of ATS in a high availability, high > traffic > >>>> web site. And I would like to ask if it make sense to use ATS for > the > >>>> purpose of "scalability" if you are already using a CDN. > >>> > >>> Y! uses it for their CDNs. If it's good enough for them.. > >>> > >>> Anyway, a CDN can be a number of things. What is it for you? > >> > >> Hi Igor. CDN for me is edge delivery, for example Akamai edge > >> platform. Static contents, particularly images and videos, can be > sent > >> to users from Akamai's nearest servers. In this case, most > contents > >> should be served from Akamai and I wonder if Apache Traffic Server > has > >> a significant role in reducing load on the web (Apache Httpd) > servers. > > > > As Igor pointed out, Yahoo! uses a version of Traffic Server that is > very > > similar to ATS v2.0.1 (which is much worse than v2.1.4 ;). Last I > heard, > > they were delivering in the order of 300,000 RPS and 30-40GBps out > of ~100 > > servers (most of which are idle, they are deployed at such large > quantity > > primarily to get edge presence around the world). If anyone from > Yahoo! is > > around, please correct me where I'm wrong on these numbers. > > > > -- Leif > > I see what you mean, and I think that makes sense to me. > > In my specific scenario, I am going to depend on Akamai for edge > delivery and caching. I do not expect much hits to the infrastructure > because Akamai will presumably cache all the static contents. So does > it makes to have ATS cache static contents for Akamai to consume?
My impression of Akamai was that, among other things, its role is also to reduce load on your servers. > I expect to use Apache Httpd in my architecture to serve static > contents, as well as proxy and mod_pagespeed, but I am not sure if > ATS > makes sense for me if I plan on using both Apache Httpd and Akamai. Do you expect Akamai to put such a load on your servers, that you have a need to reduce this pain with ATS, if so, then by all means, go for it. BUT: Please consider: You're introducing another layer into your system. And hence the system's complexity. i -- Igor Galić Tel: +43 (0) 664 886 22 883 Mail: [email protected] URL: http://brainsware.org/
