TCP/IP and network concepts for advanced tuning

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If you plan to tune TCP/IP settings for the IBM Storage Protect client or server, first ensure that you understand key concepts.

TCP/IP sends and receives data for applications on a system. TCP/IP is composed of two protocols: Transmission Control Protocol (TCP) and Internet Protocol (IP).

Applications such as the IBM Storage Protect client and server interact with TCP. By changing the TCPWINDOWSIZE client and server options, you affect the flow control function in TCP.

Applications do not interact with IP or lower-level protocols that control how one system communicates its receive window size to another, retransmission of lost data, or receipt of data from a sending system.

The following factors can affect network operations:

System resources, such as memory and processors.
Communications adapters. Link utilizations and the limitations of various communication layer implementations affect the use of resources.
Data sizes and load on the network.