[rfc-dist] RFC 5047 on DA: Datamover Architecture for the Internet Small Computer System Interface (iSCSI)

rfc-editor@rfc-editor.org rfc-editor at rfc-editor.org
Wed Oct 31 15:54:33 PDT 2007


A new Request for Comments is now available in online RFC libraries.

        
        RFC 5047

        Title:      DA: Datamover Architecture for the 
                    Internet Small Computer System Interface (iSCSI) 
        Author:     M. Chadalapaka, J. Hufferd,
                    J. Satran, H. Shah
        Status:     Informational
        Date:       October 2007
        Mailbox:    cbm at rose.hp.com, 
                    jhufferd at brocade.com, 
                    Julian_Satran at il.ibm.com, hemal at broadcom.com
        Pages:      49
        Characters: 107970
        Updates/Obsoletes/SeeAlso:   None

        I-D Tag:    draft-ietf-ips-iwarp-da-05.txt

        URL:        http://www.rfc-editor.org/rfc/rfc5047.txt

The Internet Small Computer System Interface (iSCSI) is a SCSI
transport protocol that maps the SCSI family
of application protocols onto TCP/IP.  Datamover Architecture
for iSCSI (DA) defines an abstract model in which the
movement of data between iSCSI end nodes is logically
separated from the rest of the iSCSI protocol in order to
allow iSCSI to adapt to innovations available in new IP
transports.  While DA defines the architectural functions
required of the class of Datamover protocols, it does not
define any specific Datamover protocols.  Each such Datamover
protocol, defined in a separate document, provides a
reliable transport for all iSCSI PDUs, but actually moves the
data required for certain iSCSI PDUs without involving the
remote iSCSI layer itself.  This document begins with an
introduction of a few new abstractions, defines a layered
architecture for iSCSI and Datamover protocols, and then
models the interactions within an iSCSI end node between the
iSCSI layer and the Datamover layer that happen in order to
transparently perform remote data movement within an IP
fabric.  It is intended that this definition will help map
iSCSI to generic Remote Direct Memory Access (RDMA)-capable IP fabrics 
in the future comprising TCP, the Stream Control Transmission Protocol 
(SCTP), and possibly other underlying network transport layers, such as 
InfiniBand.  This memo provides information for the Internet community.

This document is a product of the IP Storage
Working Group of the IETF.


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