Atul,

I've had similar requirements where I had one low latency app and a cluster file system.

Rather than lose the resiliency that two ports provide, I used the QoS capabilities to differentiate the services provided to the applications, making one higher priority than the other. This way, the packets for my low latency application would never get queued behind any packets for the cluster file system.

MPI has similar low latency requirements to maximize application throughput.

I can provide the setup I used as an example, if you are interested.

On 26/07/14 10:45, Atul Yadav wrote:
Dear Admin,

In our exiting setup we are having 18 server with dual IB cards.
And 2 IB switch.

We are planning to use MPI traffic on IB Port1 and Lustre Traffic on IB port 2.

IB Port 1       
        Hostname        
        IB Port 2
IB Switch  1    IP Address      Hostname        IP Address      IB Switch  2
Port 1  192.168.2.1     Compute-1       192.168.3.1     Port 1
Port 2  192.168.2.2     Compute-2       192.168.3.2     Port 2
Port 3  192.168.2.3     Compute-3       192.168.3.3     Port 3
Port 4  192.168.2.4     Compute-4       192.168.3.4     Port 4
Port 5  192.168.2.5     Compute-5       192.168.3.5     Port 5
Port 6  192.168.2.6     Compute-6       192.168.3.6     Port 6
Port 7  192.168.2.7     Compute-7       192.168.3.7     Port 7
Port 8  192.168.2.8     Compute-8       192.168.3.8     Port 8
Port 9  192.168.2.9     Compute-9       192.168.3.9     Port 9
Port 10         192.168.2.10    Compute-10      192.168.3.10    Port 10
Port 11         192.168.2.11    Compute-11      192.168.3.11    Port 11
Port 12         192.168.2.12    Compute-12      192.168.3.12    Port 12
Port 13         192.168.2.13    Compute-13      192.168.3.13    Port 13
Port 14         192.168.2.14    Compute-14      192.168.3.14    Port 14
Port 15         192.168.2.15    Compute-15      192.168.3.15    Port 15
Port 16         192.168.2.16    Compute-16      192.168.3.16    Port 16
Port 17         192.168.2.17    Compute-17      192.168.3.17    Port 17
Port 18         192.168.2.18    Compute-18      192.168.3.18    Port 18



need your help in opensm configuration and setup ....

Thank You
Atul Yadav



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