By Santosh Kulkarni, Prathima Agrawal

This ebook addresses the necessity to increase TCP’s functionality within info facilities through delivering recommendations which are either sensible and backward appropriate with general TCP types. The authors technique this problem first via deriving an analytical version for TCP’s functionality less than ordinary info middle workload site visitors. They then talk about a few recommendations which are designed to enhance TCP functionality via both proactively detecting community congestion via probabilistic retransmission or through heading off timeout penalty via dynamic resizing of TCP segments. Experimental effects express that every of concepts mentioned outperforms typical TCP inside of a knowledge heart.

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Extra info for Analysis of TCP Performance in Data Center Networks (SpringerBriefs in Electrical and Computer Engineering)

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I denotes the sequence number of the first packet lost in T D Pi (for simplicity, we assume the sequence numbers to begin at 1 for every TD-period). After receiving a triple duplicate acknowledgment for one of the composite flows, the cumulative flow recognizes that a packet has been lost (receiving the ACK for packet γi ). We consider that a TD period ends when the cumulative flow recognizes a loss event. This usually happens in the round following the actual loss; we call this round the “loss round”.

21 gives us an expression to compute the throughput of Incast traffic when all the composite flows are in congestion avoidance phase and receive only loss indicating events that are of type TD. In this equation, we can approximate j, the mean number of flows experiencing a loss in a round, with the expression pprc . Since j must be no more than n, we have j = min n, pr pc . 3 Timeout Loss Indications In this subsection we model the throughput of cumulative flow for loss indications that are of type “time out” (TO).

Furthermore, three-way handshake can be used to establish a TCP connection even in absence of a global clock. The mechanism can also prevent old connection initializations and data packets from causing any confusion. Additionally, the endpoints can exchange parameter and option information such as MSS, during connection establishment [7]. The process which initiates the three-way handshake does so by issuing an active open request. Processes can also issue passive opens before waiting for matching active opens from other networked applications and be informed by TCP when connections have been established.

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Analysis of TCP Performance in Data Center Networks (SpringerBriefs in Electrical and Computer Engineering) by Santosh Kulkarni, Prathima Agrawal

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