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    Re: multiple tcp connections



    
    
    Julian,
    Since a session is only an iSCSI thing, your statements would be correct
    even if there were only one TCP connection per session, but several
    sessions on the same NIC.
    
    
    
    
    .
    .
    .
    John L. Hufferd
    Senior Technical Staff Member (STSM)
    IBM/SSD San Jose Ca
    (408) 256-0403, Tie: 276-0403
    Internet address: hufferd@us.ibm.com
    Notes address: John Hufferd/San Jose/IBM @ IBMUS
    VM address: hufferd at IBMUSM54
    
    
    Julian Satran/Haifa/IBM@IBMIL@ece.cmu.edu on 07/07/2000 11:18:48 PM
    
    Sent by:  owner-ips@ece.cmu.edu
    
    
    To:   ips@ece.cmu.edu
    cc:
    Subject:  Re: multiple tcp connections
    
    
    
    
    
    Parallelism on end-points could be another reasons.
    
    A long time ago when running some benchmarks we achieved considerably
    better numbers with 4 sockets than with one.
    
    This type of result repeated itself in different contexts and with
    different stacks.
    
    That is probably due to some serialization that is inherent in the way
    stacks are built
    and API's are used (this is a long discussion subject).
    
    With SMPs the differences are even more striking.
    
    Julo
    
    Matt Wakeley <matt_wakeley@agilent.com> on 08/07/2000 02:11:57
    
    Please respond to Matt Wakeley <matt_wakeley@agilent.com>
    
    To:   Randy Haagens <Randy_Haagens@hp.com>, Julian Satran/Haifa/IBM@IBMIL
    cc:
    Subject:  multiple tcp connections
    
    
    
    
    Hi,
    
    I was asked the question:
    
    If there is only 1 MAC (available to the system), would there ever be more
    than 1 tcp connection per iSCSI session.  I couldn't think of a good reason
    why there would be, but thought I'd ask you. The only reason I could think
    of
    using multiple tcp connections per iSCSI session was for port aggregation
    when
    there are multiple MACs available.  Any comments?
    
    Thanks,
    
    -Matt
    
    
    
    
    
    
    
    


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