search

openrtb / OpenRTB

Documentation and issue tracking for the OpenRTB Project
BSD 2-Clause "Simplified" License
859 stars 143 forks source link

Upgrading the Transport layer #18

Open vishnu667 opened 9 years ago

vishnu667 commented 9 years ago

Is it possible to upgrade from HTTP to SPDY / HTTP 2 for transport  of BID Requests between exchanges.

lpgauth commented 9 years ago

I'm not aware of anyone in the industry doing SPDY / HTTP2 for BidRequests...

drjbutler commented 9 years ago

OpenRTB requires HTTP support minimally, but does not preclude exchanges and their bidders from using other transports. This is similar to requiring JSON for representation minimally, but allowing any other protocols (e.g., Avro, protobufs, etc.) that the parties wish to support.

:JB

On Tue, Jun 2, 2015 at 1:49 PM, Louis-Philippe Gauthier < notifications@github.com> wrote:

I'm not aware of anyone in the industry doing SPDY / HTTP2 for BidRequests...

— Reply to this email directly or view it on GitHub https://github.com/openrtb/OpenRTB/issues/18#issuecomment-108029133.

James M. Butler, Ph.D.* | SVP Technology *millennial media Mobile: 617.834.2125 Email: jbutler@millennialmedia.com Web: www.millennialmedia.com Twitter: @millennialmedia Facebook: Facebook/millennialmedia

jpathak commented 8 years ago

From the OpenRTB2.3 spec, one of the ways indicated to improve connection performance is to use connection Keep-Alive. However it's not clear whether this avoids HOL blocking, is there any evidence of that happening in practice ?

manigandham commented 8 years ago

@jpathak

Connection Keep-Alive is only used to keep the TCP connection itself from closing after every request. This greatly reduces the overhead and is pretty much on by default (or should be) these days.

This has nothing to do with the actual requests themselves and multiple requests can travel over the same connection, however HTTP/1.1 has no capabilities to overcome head-of-line blocking. There is HTTP pipelining which allows for sending several requests without waiting for each response immediately but this has varying support, tends to cause more problems than it solves, and it doesn't overcome HOL blocking either.

SPDY and HTTP/2 solve the HOL blocking issue by creating multiple streams within each connection that can support requests in parallel.

jpathak commented 8 years ago

Thanks @manigandham!