linux limit network bandwidth

processing.Bandwidth SavingsNaturally, the best way to avoid congestion is not to send so much data. But this is not realistic for users, after all, transmission of data is the fundamental meaning of the existence of the network. But the kernel is also as technical as possible to reduce the user's data. Typical is the Nagle algorithm.NagleThere are two types of data that TCP transmits: commands and data. TCP does not know whether it is a stream of co

Article title: improve socket performance on Linux-accelerate network applications. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. When developing a socket application, the first t

1. Terminology of network communication1.1. Three modes of communicationUnicast, multicast, broadcast;1.2. LAN compositionComputers PCs Servers interconnections NICs Media Network devices Hubs Switches routers Protocols Ethernet IP ARP DHCP(1) Hub hubHub: Multiport repeater; hub does not remember which MAC address the packet was issued from, which MAC address is on which port of the hub; Hub features: Share

Linux System and Performance Monitoring (Network)Date: 2009.07.21Author: Darren HochTranslation: Tonnyom [AT] hotmail.com Followed by the first three articles:Linux System and Performance Monitoring (CPU)Linux System and Performance Monitoring (Memory)Linux System and Performance Monitoring (I/O) 8.0

1 Introduction to Analog delay transmission Netem and Tc:netem are a network emulation module provided by the Linux kernel version 2.6 and above. This function module can be used to simulate complex Internet transmission performance in a well performing LAN, such as low bandwidth, transmission delay, packet loss, and so on. Many distributions

the second step, modify the /etc/pam.d/login file to add the following line to the file: 　　　　Session required/lib/security/pam_limits.so　　　　If it is a 64bit system, it should be:Session required/lib64/security/pam_limits.so In the third step, modify the /etc/sysctl.conf file to add the following line in the file (clear the original contents of the file) ( modify the network kernel restrictions on TCP connections ): Net.ipv4.ip_loca

Original link: http://www.ibm.com/developerworks/cn/linux/l-hisock.htmlUsing the Sockets API, we can develop client and server applications that can communicate on the local network or on a global scale over the Internet. As with other APIs, you can use the Sockets API in a number of ways to improve the performance of the socket or to limit the performance of the

fact, in linux, we can set multiple IP addresses for a network card, for example, the following command: # Ifconfig eth0: 1 202.112.11.218 netmask quota limit 192 Then, run the command # ifconfig-a to view the interfaces of all network interfaces: Eth0 Link encap: Ethernet HWaddr 00: 90: 27: 58: AF: 1A Inet addr: 202.

tc Filteradd Dev eth0 parent 1:protocol IP prio u32 match IP DST192.168.111.0/24 Flowid 1:1can limit 192.168.111.0 to 255 of the bandwidth of 3000k, the actual download speed of about 200k. In this case, all the machines in this segment share the 200k bandwidth.You can also add a SFQ (random fair queue)TC Qdisc Add dev eth0 root handle 1:htb r2q 1 TC class Add Deveth0 Parent 1:classid 1:1 HTB rate 3000kbit

Tags: set process proportional outage-o gen BSP Tput LookupOriginal: http://www.cnblogs.com/Security-Darren/p/4700387.htmlA network failure to troubleshoot a Linux system.Network troubleshooting is generally a certain way of thinking and order, in fact, the idea of troubleshooting is based on the specific problem-by-paragraph troubleshooting may occur, the final determination of the problem.So the first thi

Linux Network Programming-Flood Attack Details, linux Network ProgrammingFlood Attack Details ① Annotation: flood attack refers to the use of computer network technology to send a large number of useless data packets to the target host,