Red Hat Bugzilla – Bug 463842
[LTC 6.0 FEAT] 201227:NFS over RDMA support
Last modified: 2011-05-23 16:18:32 EDT
=Comment: #0================================================= Emily J. Ratliff <emilyr@us.ibm.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@redhat.com 5. Primary contacts at Partner: Project Management Contact: Sarah Wright, sarahw@us.ibm.com, 503-578-5145 Technical contact(s): Frank Filz, ffilz@us.ibm.com IBM Manager: Jeffrey Heroux, heroux@us.ibm.com
RHEL 6 will include at least a 2.6.25 kernel, and nfs-utils-1.1.3, so this should not be a problem. The feature requested has already been accepted into the upstream code base planned for the next major release of Red Hat Enterprise Linux. When the next milestone release of Red Hat Enterprise Linux 6 is available, please verify that the feature requested is present and functioning as desired.
Since this is already accepted by Red Hat, moving to Accepted here
------- Comment From iranna.ankad@in.ibm.com 2010-06-09 01:47 EDT------- An update from SystemX Distro Test team: We are still unable to verify NFS over RDMA feature on X, blocked by below bug. Waiting for the resolution of this blocker. Bug 64126 - RIT983903- [Infiniband]NFS over RDMA is not happening on RHEL6. Thanks!
Based on comment 4, this bug is currently unverifiable.
This appears to have been fixed by the bug mentioned in comment #4 (although the link is wrong so I don't know which bug it's really referring to). Can IBM verify that this is working with the GA release?
Sandia might be interested in this for their RedSky cluster.
verify this function when test bug 631012, pls go there to see detail comments.
An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on therefore solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHSA-2011-0542.html