From: Voice of the Blind ™ Network Operation <noc () vobradio org>
Hello, is a anycasted Prefix a good idea for Streaming?
Maybe. I've used TCP anycast-based CDNs (CacheFly and MaxCDN/NetDNA), and they work very well. I observe they generally work something like this: 1. DNS resolution with long TTLs returning anycasted IPs. 2. Smaller HTTP requests served directly from anycast IP with http keepalives enabled. 3. Large objects and streams do an application layer redirect (HTTP or whatever stream protocol) to a DNS name that returns unicast IPs for the node you initially reached via anycast. I would recommend looking at CDNs however, as this is an area where scale does matter and you will find it very difficult to do this better or cheaper yourself.
On Sun, Aug 12, 2012 at 3:15 PM, Ryan Malayter <malayter@gmail.com> wrote:
I would recommend looking at CDNs however, as this is an area where scale does matter and you will find it very difficult to do this better or cheaper yourself.
an interesting observation.. I wonder how much something like a CDN costs for something like the OP's usecase? I wonder if doing something like uploading to YouTube and then letting them sort out the streaming/locality problem is better? (also then you don't necessarily have to run your own network stuff) -chris
On Aug 12, 2012, at 3:15 PM, Ryan Malayter wrote:
I would recommend looking at CDNs however, as this is an area where scale does matter and you will find it very difficult to do this better or cheaper yourself.
<personal hat on> I certainly see this as a challenge to compete with the breadth of the existing CDN networks. Many cases it is just easier to outsource this function and capability. I've found myself starting to lean in the direction of minimizing the problems that I need to debug/solve. This usually results in a lower cost and more free time to deal with whatever else it is. Building your Anycast/Mini-CDN infrastructure yourself is going to make it so you need to re-learn lessons that others have already learned. Even if you were formerly at a CDN, I'm sure there is some black magic you were unaware of. It sounds like you have a few servers and are just trying to do IPv6 "on the cheap" or similar to HE. It may be worthwhile to avoid the tunneled infrastructure to yourself and use a carrier that has native. There are numerous carriers with a global footprint that can do this for you. <personal hat off> I would be cautious about the complexity and your overall requirements of performing a solution like this. Anycast is just a name for a technique, there is more to it than that to implement it. (In the same way internal combustion engines have various levels of complexity - diesel, gasoline, E85, injectors, etc). - Jared
participants (3)
-
Christopher Morrow -
Jared Mauch -
Ryan Malayter