Subject: [CDNi] CDNI and byte-range requests

From: "Brandenburg, R. (Ray) van" <[email-masked]>
Date: Tue, 30 Jul 2013 11:27:00 +0000

Hi all,

As I'm not sure whether this should be part of the Redirection Interface document or the Framework document, let me just post this as a general question to the list:

To my knowledge, the current CDNI documents do not explicitly address the case of HTTP Byte-range requests. Although in most cases byte-range requests will function just as any other requests, I think there are some cases where byte-range requests warrant further attention. An example is the Redirection interface. If a uCDN asks a dCDN to deliver a particular user request (containing a byte range), and the dCDN answers positively, can the uCDN assume that the dCDN accepts any future requests for the same file with a different byte range? And if that is the case, is this default behavior or do we need an explicit flag in the inter-CDN redirection request to indicate the uCDN/dCDN's preference? 

To be clear: I don't think we need any new functionality to handle byte-range requests, but a few sentences in either the Framework or the RI document might clear up any future uncertainty. 

Best regards,

Ray
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