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Instead of re-transmitting the packet AND ALL SUBSEQUENT packets in a block, instead use Selective Acknowledgements to re transmit ONLY the packet in error.
Today IBM i re-transmits many times the number of packets that are actually required!
In high volume traffic situations such as MIMIX and PowerHA re-transmissions clobber throughput. This causes large slowdowns in actual data throughput even though line utilization is high. Reducing the number of packets transmitted in this case could help significantly.
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