Sun Microsystems none manual Setting Parameters in the /etc/system File

Page 33

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

25

Page 32 Page 34
Image 33
Page 32 Page 34
Contents PlatformNotesThehmeFast Ethernet Device Driver Please Recycle Page Page Contents Setting Parameters Contents Vii Viii Related Documentation Introduction to the hme Fast Ethernet Device DriverDescribes the typographic conventions used in this book Typographic ConventionsOrdering Sun Documents Shell Prompts in Command ExamplesSun Welcomes Your Comments Hardware Overview Hme Device DriverAuto-Negotiation Operating Speeds and ModesExternal Transceiver Internal TransceiverPlatform Notes The hme Fast Ethernet Device Driver-May Driver Parameter Values and Definitions Parameter DefinitionsRead only Local transceiver auto negotiation Capability Inter-Packet Gap Parameters Defining the Current StatusLancemode Defines the lancemode and ipg0 parameters Operational Mode ParametersSelecting the Internal or External Transceiver Reporting Transceiver Capabilities Defining the Number of Back-to-Back Packets To TransmitDescribes the read-only link partner capabilities Reporting the Link Partner Capabilities= No 100Mbit/sec half-duplex transmission Platform Notes The hme Fast Ethernet Device Driver-May Parameter Options Setting ParametersSetting Parameters Using ndd Identifying Device InstancesTo specify the device instance for the ndd utility To modify a parameter value Non-Interactive and Interactive ModesTo display the value of a parameter To modify a parameter value in interactive modeRefer to -1 through 3-8 for parameter descriptions To list all the parameters supported by the hme driverTo set the mode to auto-negotiation Setting Forced ModeConfiguring TCP/IP for Maximum Performance Setting Parameters in the /etc/system FileTo benchmark the TCP/IP throughput To set the TCP hiwater marks for best performanceTo set the ipg1 to 10 and ipg2 to 5 when you reboot Setting Parameters Using the hme.conf File Specify name=hme and class=sbus

none specifications

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.

One of the key technologies developed by Sun was the SPARC architecture. This scalable, high-performance RISC (Reduced Instruction Set Computer) architecture powered many of its servers and workstations, allowing for enhanced computing capabilities. SPARC systems were well-regarded for their performance efficiency and reliability, making them a popular choice for enterprise applications.

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.
Top Page Image Contents