4

Configuring TCP/IP for Maximum Performance

This section describes how to benchmark the TCP/IP throughput and how to set the TCP/IP hiwater marks for best performance.

▼To benchmark the TCP/IP throughput

♦Use the ndd command to configure the values of some of the TCP parameters for maximum performance.

▼To set the TCP hiwater marks for best performance

♦Type the following ndd commands:

#ndd -set /dev/tcp tcp_xmit_hiwat 65535

#ndd -set /dev/tcp tcp_recv_hiwat 65535

#ndd -set /dev/tcp tcp_cwnd_max 65534

Setting Parameters in the /etc/system File

To configure the hme driver parameters for all SUNW,hme devices in the system so that the parameter variables are always effective (even after rebooting the system), enter the parameter variables in the /etc/system file. When you reboot the system, the system reads the /etc/system file and sets these parameter variables in the hme module in the operating system kernel.

Table 4-1 lists the variables you need to set in the /etc/system file.

Table 4-1Setting Variables in the /etc/system File

ParameterVariable

ipg1hme_ipg1

ipg2hme_ipg2

use_int_xcvrhme_use_int_xcvr

pace_sizehme_pace_size

adv_autoneg_caphme_adv_autoneg_cap

Setting Parameters

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Sun Microsystems none manual Setting Parameters in the /etc/system File, Configuring TCP/IP for Maximum Performance
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Sun Microsystems, established in 1982, became a pioneering force in the realms of computing and technology. Initially founded by four Stanford University graduates, the company was built on innovative ideas and a vision to create powerful computing solutions. One of the standout features of Sun Microsystems was its commitment to open systems and network computing. Sun's early adoption of Unix operating systems significantly influenced the development of reliable and scalable systems.

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Sun also played a crucial role in software development. The introduction of the Java programming language in the mid-1990s revolutionized how developers approached cross-platform application development. With its tagline “Write Once, Run Anywhere,” Java enabled applications to run on various platforms without modification. This technology became foundational in web-based applications and enterprise solutions.

Another notable aspect of Sun Microsystems was its commitment to networking and storage solutions. The company developed robust server systems that catered to high-performance computing demands, supporting enterprises in managing vast amounts of data. Sun’s Network File System (NFS) allowed seamless file sharing across networks, which became a standard in many organizations.

The company was also a pioneer in providing various services and solutions for data centers, including virtualization and cloud computing approaches that preceded the wave of cloud services we see today. Their emphasis on innovative storage solutions and data management systems positioned them as industry leaders.

Though Sun Microsystems was acquired by Oracle Corporation in 2010, its technological legacy continues to shape the IT landscape. The contributions made by Sun in areas such as software development, hardware architecture, and open systems have left an indelible mark on the technology industry. The emphasis on openness and innovation laid the groundwork for many principles that guide modern computing, making Sun Microsystems an integral part of the history of technology.
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