Bug 463842

=Comment: #0=================================================
Emily J. Ratliff <emilyr.com> - 2008-09-24 13:52 EDT
1. Feature Overview:
Feature Id:	[201227]
a. Name of Feature:	NFS over RDMA support
b. Feature Description
Remote Direct Memory Access (RDMA) allows data to move directly from the memory of one computer into
that of another without involving either one's operating system.  This permits high throughput,
low-latency networking, which is especially useful in massively parallel computer clusters.  NFS
over RDMA improves efficiency of write path, lowers CPU usage.

Additional Comments:	Final bits made it into 2.6.25 kernel, so using that as actual code completion
date.

2. Feature Details:
Sponsor:	LTC
Architectures:
x86
x86_64
ppc64

Arch Specificity: Purely Common Code
Affects Kernel Modules: Yes
Delivery Mechanism: Direct from community
Category:	Networking
Request Type:	Kernel - Enhancement from Upstream
d. Upstream Acceptance:	Accepted
Sponsor Priority	2
f. Severity: Medium
IBM Confidential:	no
Code Contribution:	3rd party code
g. Component Version Target:	Kernel and nfs-utils package

3. Business Case
Some key customers are requesting to have NFS over RDMA (over iWARP/RDMA  enabled Ethernet NICs)
supported to address the performance bottlenecks seen in their data center environments. This is one
of the enablers to fill-in the large 10G pipes deployed in data centers.

Benefits
NFS over RDMA offers significant performance improvements with less CPU utilizations.

4. Primary contact at Red Hat: 
John Jarvis
jjarvis

5. Primary contacts at Partner:
Project Management Contact:
Sarah Wright, sarahw.com, 503-578-5145

Technical contact(s):
Frank Filz, ffilz.com

IBM Manager:
Jeffrey Heroux, heroux.com