Keshetti Mahesh wrote:
I want to use the RDMA CM option of MVAPICH2. The procedure described
in the user guide is not much informative. ... Also, I'll be glad if some
one can give
me a document describing how it works in detail.
try looking on the rdma_cm(7) man page installed by librdmacm
Actually I have some doubts like, how the IP addresses (???) are
resolved into IB addresses and what happens in the case of nodes two HCAs
(or 1 HCA with two ports) ?
each port you want to use for your job (HCA with two ports, two HCAs,
etc) has to have an IP address associated with it. This IP address (or a
host name which is translated to it through DNS lookup) is probably what
you want the rank to advertise. RDMA address resolution uses route
lookup and ARP to learn the local <HCA, port, PKEY> and remote GID.
In the MVAPICH2 user guide it is mentioned that "RDMA CM device needs
to be setup, configured with an IP address and connected to the network".
Is this same as configuring IPoIB device ?
for IB, yes.
Or.
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