Re: XenServer support
This is in the prod version. When I first attempted the install it listed along list of packages that were missing. I installed them by modifying therepo list and using Yum. Among these were several...
View ArticleRe: XenServer support
Here is a better question. When the install is complete on the DDK VM doesthe process create an rpm that I can install on the production version? This is my first forray into the infiniband world. We...
View ArticleRe: multiport IB card pros
Please correct me if I am wrong. With PCIE 2 x 8 card, isn't the max throughput is 32 Gbit/s? Is that going to be better to use two 1 port card instead of one dual ports card for better performance?
View ArticleClik here to view.
Re: multiport IB card pros
Good question. For example MHJH29-XTC Dual 4X 40Gb/s InfiniBand has PCIe x8 2.0 5.0GT/s (4 GB/s) so how will one be able to push 2*40Gb/s thru it? A PCIe 3.0 x8 or 2.0 x16 might be able to handle such...
View ArticleRe: XenServer support
Thank you for the advice! The cards and switches we picked up are all DDR but it seems we would stillbe taking a step backwards until infiniband is natively supported in thexenserver kernel. Thank you...
View ArticleRe: multiport IB card pros
Let me try to explain PCI Generations, lane width and the cards as well. There are three components here:1. PCIe Generation, lane width,2. IB speed- QDR/FDR etc3. Encoding schemes 1. PCI Gen 2 speed...
View ArticleRe: multiport IB card pros
There is no way to push 80Gb/s on one single PCIe Gen 2x8 slot. This is the slot limitation. See my detailed explanation below for real world BW.
View ArticleRe: multiport IB card pros
For QDR with 2012 R2 RDMA, I have seem result close to 3200 MB/s. Is that means we can overcome the PCIE limitations?
View ArticleRe: multiport IB card pros
Thank you se-rulez for explaining this. The reality does not look so brilliant as the commonly used figures.20Gbps * 0.8 (DDR overhead) * 0.8 (PCI<=2.0 overhead) = 12.8 Gbit40Gbps * 0.8 (QDR...
View ArticleRe: multiport IB card pros
Remember that this limitation is from server to switch and is a function of the PCI capabilities rather than Infiniband protocol.Is a dual port ConnectX-3 (PCI 3.0) on the storage server my option for...
View ArticleRe: multiport IB card pros
No, that works out exactly to the number the calculations arrived at. 3200*8= 25600 Mbps or 25.6Gbps for QDR
View ArticleRe: Link up delay above QDR switches..
logical... does that mean:"no issues with physical link. it comes up as expected. but the ZFS SRPT connection takes time..." right? If yes, on the very basic level - how long until the server gets LID...
View ArticleRDMA WRITE target buffer updation.
Hi all, I am writing RDMA_WRITE latency(Round Trip Latency) application using OFED user verbs and kernel verbs. Since, in RDMA_WRITE, no work completion is generated on res-ponder side.I am using...
View ArticleClik here to view.
Re: vSphere 5.1 U1 IPoIB VLAN support
In Windows environment, there is a limit with one partition/port. Just wondering how you were having mutiple partitions since I saw you list CSV/LM/HB/iSCSI?
View ArticleIs it 2015 already?
Mellanox OFED for Linux Release NotesRev 2.1-1.0.0Last Modified: 15 January, 2015
View ArticleDriving a 100 Gigabit Network with OpenStack
Here is a good blog post testing Mellanox adapters in OpenStack environment. Buried Lede: Driving a 100 Gigabit Network with OpenStack
View ArticleRe: Link up delay above QDR switches..
Hi! yairi...:)SM is embedded in Voltaire 4036 QDR switch. Major problem is your vSphere SRP Initiator. This driver doesn't disconnect (logout) from ZFS SRPT when ESXi host reboot everytimes. Frankly...
View ArticleClik here to view.
Re: Upgrading 4036, media full
That's a good news....:) I'm struggled migration of Exchange Server 2003 to 2013 last week. I'm also experienced some problem that update 4036 firmware 2.x to 3.0. That's a final mountain for latest...
View ArticleRe: Scientific Linux 6.4 errors with mlnxofedinstall & mlnx_add_kernel_support
Update: There is a new ISO & TGZ, MLNX_OFED_LINUX-2.1-1.0.0-rhel6.5-x86_64 This ISO will install on CentOS and Scientific Linux with the latest kernel update, 431 Although I have discovered...
View Article