nanog mailing list archives
Re: Content Delivery Networks
From: "Patrick W. Gilmore" <patrick () ianai net>
Date: Tue, 7 Aug 2007 09:07:28 -0400
On Aug 7, 2007, at 3:59 AM, Michal Krsek wrote:
5) User redirection- You have to implement a scalable mechanisms that redirects users to the closes POP. You can use application redirect (fast, but not so much scalable), DNS redirect (scalable, but not so fast) or anycasting (this needs cooperation with ISP).
What is slow about handing back different answers to the same query via DNS, especially when they are pre-calculated? Seems very fast to me.
Application redirection is far, far slower. (I am assuming you are talking about something like HTTP level redirects. Did you mean something else?)
As for anycast, with your own backbone, you don't need any cooperation. Even if you don't, the cooperation you need from your providers & peers is minimal at worst. (At least relative to writing the code for, say, DNS redirection.) But anycast assumes "BGP knows best", and we all know that is not even close to the truth.
-- TTFN, patrick
Current thread:
- Cisco CRS-1 vs Juniper 1600 vs Huawei NE5000E ALEJANDRO ESQUIVEL RODRIGUEZ (Aug 02)
- Re: Cisco CRS-1 vs Juniper 1600 vs Huawei NE5000E Mikael Abrahamsson (Aug 03)
- Re: Cisco CRS-1 vs Juniper 1600 vs Huawei NE5000E Robert Boyle (Aug 03)
- Re: Cisco CRS-1 vs Juniper 1600 vs Huawei NE5000E Pekka Savola (Aug 03)
- RE: Cisco CRS-1 vs Juniper 1600 vs Huawei NE5000E Jason J. W. Williams (Aug 03)
- Content Delivery Networks Rod Beck (Aug 06)
- Re: Content Delivery Networks Patrick W. Gilmore (Aug 06)
- Re: Content Delivery Networks Michal Krsek (Aug 07)
- Re: Content Delivery Networks Patrick W. Gilmore (Aug 07)
- Re: Content Delivery Networks Michal Krsek (Aug 07)
- Re: Content Delivery Networks Patrick W.Gilmore (Aug 07)
- Re: Content Delivery Networks Michal Krsek (Aug 07)
- Re: Content Delivery Networks Paul Reubens (Aug 09)
- Re: Content Delivery Networks Rodney Joffe (Aug 10)
- RE: Content Delivery Networks andrew2 (Aug 10)
- Re: Content Delivery Networks John Levine (Aug 10)
- Re: Content Delivery Networks Patrick W. Gilmore (Aug 10)
- Re: Content Delivery Networks Crist Clark (Aug 10)
- Re: Cisco CRS-1 vs Juniper 1600 vs Huawei NE5000E Pekka Savola (Aug 03)
- Message not available
- Re: Content Delivery Networks Rodney Joffe (Aug 10)