To learn basics of InfiniBand I suggest you to visit Mellanox Academy Web-Site and after registration take InfiniBand Essentials or InfiniBand Fundamentals course (in a section Technologies). In my opinion "switch-based architecture" means that switches are part of fabric (see picture below, where I have shown switch by blue shape). End-to-end flow control, aka …

May 11, 2018 · The InfiniBand specification defines how the transport layer should be implemented (either in hardware or software), and also defines how it should be exposed to users.

Nov 23, 2013 · As we know, Infiniband allows RDMA - direct access to the memory of the remote computer. It is also known, that the PCI-Express (endpoint) devices, including the PCIe-card Infiniband, are able to communicate in two ways:

Aug 26, 2013 · You can refer the following table for the appropriate cable selection. In a topology like fat-tree, if you like to connect a leaf switch with a spine switch, even the length is less than 10m, go for optical cables since the bandwidth will be high and will be fatter when traversing upwards in the topology.The attenuation will be higher in the copper cable in high frequencies …

Jun 11, 2018 · So, my question is if it is possible to map the remote memory addresses into the virtual address space of a host. Of course, all initialization of VPI components, registration of memory with ibv_reg_mr, and exchange of remote keys and addresses would still have to be done. Does Infiniband offer anything to make this possible? Thanks!

Jan 21, 2016 · Man pages of linux command ibstat and ibv_devinfo say ibstat - query basic status of InfiniBand device(s) ibv_devinfo - query RDMA devices In this context, what is the difference between Infiniband devices and RDMA devices? And in what circumstances, are the outputs of these two commands different (i.e. they differ in the list of devices output)?

Dec 29, 2024 · Is it possible to use RDMA over native InfiniBand without IPoIB (using just guid or lid)? I have checked Infiniband addressing - host names to IB address without IBoIP and in RDMA Connection Manager ...

Aug 18, 2015 · I am measuring the performance of InfiniBand using iperf. It's a one-to-one connection between a server and a client. I measured the bandwidth changing number of threads which request Network I/O...

I have a few multi-core computers connected by Infiniband network. I would like to have some low-latency computation on a pool of shared memory, with remote atomic operations. I know RDMA is the w...

Aug 26, 2021 · Thank you so much just for replying, I realise its a mess but the data itself in this test is irrelevant it does the same thing with writes, one thread receives more completions than the other and the others get stuck. I have tried creating a completion queue per thread but they don't do anything if I remember correctly, I haven't done anything with RDMA for a while because I …