net ipv4

Brief introductionDivided into two categories according to function: High availability and load balancingA highly available cluster is typically two servers, one working, the other being redundant, and redundancy will take over as the service goes

1.background:The SCTP protocol does not match the resulting kernel compilation.The company's Sigtrans is that Huawei's HSTP in the hstp of the SCTP layer of Huawei found that the INIT message did not know our SCTP the ecn\forward tsn\adaptation

One, LVS three kinds of packet forwarding methodLVS provides three packet forwarding methods: NAT (Network address mapping), IP tunneling (IP tunneling), direct Routing (straight route)Different forwarding mode determines the network structure of

1. operating system version and LVS software version: CentOS6 (Linux Kernel 2.6.32-71.el6.i686)ipvsadm 1.2.4keepalived 1.1.17 2. Required IP Configuration: LVS Master Ip: 10.0.0.5lvs backup IP: 10.0.0.6realserver IP: 10.0.0.7, 10.0.0.5 (and), 10.0.0

Firewall in LinuxIntroduction to Linux Firewall: first, network packets need to enter your host through the firewall, server software program (Verification account), SELinux and File System (permission rwx, etc. Main firewall categories: 1,

Dr mode configuration script in lvs1. Introduction to lvs 1.1 installation in dr Mode Installation Details: http://www.bkjia.com/ OS /201601/410689.html.1.2 lvs Mode Lvs has three modes: dr, nat, and tun. Here we will first introduce the dr mode.1.3

Install Oracle 11g R2 + RAC + ASM in Oracle Linux 6.4 I. Version descriptionMany articles related to the Internet are found, but they are not very specific. Therefore, the detailed version is used to make the article more practical.This is the RAC

I. Analysis Tools 1. CPU performance analysis tools: Vmstat PS SAR Time Strace Pstree Top2 and memory performance analysis tools: Vmstat Strace Top IPCS Ipcrm CAT/proc/meminfo CAT/proc/slabinfo CAT/proc // maps3 and I/O performance analysis

The previous note mainly introduced the basic knowledge related to time_wait. This article describes how to solve the problem raised by the article title based on practice. 1. view the system network configuration and current TCP statusIt is

LVS introduction: LVS is short for Linux vritual server and a Linux virtual server. It is mainly used for multi-server load balancing and works at the network layer. LVS works similar to iptables, and many principles are the same. LVS scheduling

Article title: Kernel 2.6 does not compile the kernel to add modules to iptables. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded

Adjust the network parameters of/etc/sysctl. conf to increase the system load. adjust the Java code of/etc/sysctl. confnet. ipv4.tcp _ syncookies1 to enable SYNCookies. When a SYN wait queue overflows, cookies are enabled to prevent a small number

I. Introduction of LVS Cluster LVS cluster uses IP load balancing technology and content-based request distribution technology, because all operations are done in the Linux operating system core space, its scheduling overhead is very small , so

★ Load BalancingLoad balancing technology is the process of sharing numerous access groups and traffic to different network devices and different servers.Data diversion in a round-robin process(1) Cisco Ethernet Channel (Cisco Corporation)(2)

Only solve the c10k problem is not enough, the processing capacity of a single host is limited, a host processing 500 Dynamic Web page request is already the limit. Here are two ways to improve processing performance, one, custom high-performance

System Centos6.0 1. NAT Mode; NAT model: address translation type, mainly for address translation, similar to the DNAT type of iptables. It implements Load Balancing through multi-object address translation; Features and requirements: 1. LVSDirector)

as long as the a Few simple routing entries are added to the Linux host, which can act as a simple router. in the actual production of the bad environment, when we need a router as simple as forwarding data, but without a router on hand, we can

Recently want to be able to configure load balancing, in the virtual machine above, but the Internet to find a lot of information is fragmented, for people who do not know, a lot of not enough detail, recently finally done, the specific steps to

Linux Network1, optimize the network device receive queuenet.core.netdev_max_backlog=3000This file represents the maximum number of packets that are allowed to be sent to the queue at a rate that each network interface receives packets at a faster

One, the LVS technology main 3 kinds of ways 1, Nat (address translation technology) Through network address translation, the LVS Scheduler rewrites the destination address of the request message and assigns the request to the backend real Web