Transport protocols and bulk file transfer

[Yunhong Gu <>]

Hi, Stas,

This week and next week I am in Pittsburgh for SC04 (so do Xinwei and
Dave H.), so I have to miss the phone conf again.

I have read your design document and I think it covers most design issues.
From the design I read that you prefer a user space implementation with
mixed loss and delay based control algorithm. I agree with this idea and I
did this in a previous version of UDT (unfortunately our paper on this
version of UDT never got published :) ). I removed the delay based
mechanish from UDT because it is hard to eliminate the estimation errors
of delay variation. I may resume this mechanism in next version of UDT
(UDT3) if I can find a more robust approach.

I also like your concern on the security issue.

About the in-bound/out-bound and path MTU issues, I think currently we do
not need to care about them. They are independent components and are not
critical.

About the TCP friendliness issue. IMO this is not a big problem as long
as the new protocol does not starve a concurrent TCP to near 0 throughput,
nor it is starved by a concurrent TCP to near 0 throughput.

About API, I'd prefer to use socket API plus overlapped IO and file
transfer support. The Windows Socket2 API is a good example.

Thanks,
Gu

Yunhong Gu, PhD Candidate

Laboratory for Advanced Computing
University of Illinois at Chicago
SEO 700, M/C 249, 851 S Morgan St
Chicago, IL 60607-7045
T (312) 996-0305
F (312) 355-0373

On Thu, 4 Nov 2004, stanislav shalunov wrote:

> Call-in information
>
>     To join the call, dial +1-734-531-0125 and use PIN 0111111.
>
>     Or, from a SIP phone, dial 
> 
>  or
>     visit https://edial.internet2.edu/call/0111111 and enter your SIP URI
>     (such as 
> sip:).
>
>     Should a tool-free number be necessary, it is +1-800-541-1710.
>
> Talk to you on Friday at 3PM.
>
>       ------------------------------------------------------------
>
> Agenda bashing
>
> Comments on minutes from last call
>
> Review of previous action items
>
>     * Stas will begin outline for design document.  [Done]
>
>     * David H. will investigate licensing terms for UDT.
>
>     * All to keep eyes open for relevant funding opportunities.
>
> Design space document comments
>
>     * Who read it or plans to do so shortly
>
>     * Comments?
>
>     * Volunteers to contribute text and editing?
>
> API requirements document, based on 2004-10-29 discussion
>
>     * Record the requirements
>
>     * A volunteer needed to edit the document
>
> Action items for next week
>
> Next meeting
>
> --
> Stanislav Shalunov            http://www.internet2.edu/~shalunov/
>
> Democracy is a form of government that substitutes election by the 
> incompetent
> many for appointment by the corrupt few.                         -- G. B. 
> Shaw
>
>