Re: TCP RDMA option to accelerate NFS, CIFS, SCSI, etc.

[Charles Esson <charlese@cvs.com.au>]

1) Given that the first paragraph says section 10 of rfc2026 is
irrelevant,
under what conditions is the document published?

Costa Sapuntzakis wrote:

> The TCP RDMA option reduces the overhead of receiving data over
> TCP-based protocols such as NFS and HTTP.
>
> It enables the construction of a simple hardware accelerator that
> copies data directly from the incoming packet into application
> buffers, avoiding expensive copies in the protocol stack.  Even
> without hardware acceleration, the option enables the protocol stack
> to decrease the number of copies it must do.
>
> The TCP RDMA option is an annotation and requires no modifications to
> higher layer protocols. It can be used with popular protocols such as
> HTTP, NFS, and CIFS, along with new protocols.
>
> The TCP option also provides a bit to indicate application-level
> message boundaries. The bit enables out-of-order processing of the TCP
> receive queue, potentially decreasing service times in the presence of
> packet drops and improving performance on parallel systems.
>
> A draft describing the TCP RDMA option can be found at:
> ftp://ftpeng.cisco.com/pub/rdma/draft-csapuntz-tcprdma-00.txt
>
> -Costa