dr asner

To disable dr. Watson, follow these steps: ClickStart, ClickRun, InOpenEnter regedit.exe in the box, and then clickOK. Find and click the following registry key:HKEY_LOCAL_MACHINE/software/Microsoft/Windows NT/CurrentVersion/AeDebugNote:: Steps 3 and 4 are optional. To restore the default settings of dr. Watson, perform these two steps. ClickAeDebugItem, and then clickRegistryOn the menuExport the Regi

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 dr features 1) Load Balan

I. Environment Description:LVS-DR-MASTER: 10.3.0.82LVS-DR-Backup: 10.3.0.70VIP: 10.3.0.60Realserver1: 10.3.0.69Realserver1: 10.3.0.83Centos: 5.7Ii. Install the LVS and keepalvied software packages1. Download related software packagesMkdir/usr/local/src/LVSCD/usr/local/src/LVSWget http://www.linuxvirtualserver.org/software/kernel-2.6/ipvsadm-1.24.tar.gzWget http://www.keepalived.org/software/keepalived-1.1.1

Smart software development-the main idea of Dr. Ivar Jacob's speech at Shanghai hero Society Author: Meng YanDr. Ivar Jacob gave the first keynote speech at the csdn hero Conference held in Shanghai on September 11, September 5, entitled "smart software development". he summarized Dr. Jacob's latest thoughts on software development in the last year or two, and gave this speech to the public for the first t

I. Analysis of the principle of LVS-DR(i) LVS-DR packet flow analysis1, the client sends a request to the target VIP, the Director (load balancer) receives. At this point the IP header and data frame header information are:2, director according to load Balancing algorithm select realserver_1, do not modify or encapsulate the IP packet, but instead the MAC address of the data frame to realserver_1 MAC addres

LVS Load BalancingRecently in the study server load Balancing, read some information on the Internet, found that the main software load Balancing scheme has nginx (load balancing for HTTP service), LVS (for the IP layer, the MAC layer of load balancing). LVS mode works in the network layer, and the kernel implements load forwarding, which is more efficient than nginx. LVS load Balancing consists of three modes: 1. Nat mode (similar to routers, to implement external network address mapping, load

routes, configure the region, and start OSPF on the specified interface (one interface can be added to only one region .) 650) This. width = 650; "src =" http://s3.51cto.com/wyfs02/M00/4C/2D/wKioL1Q3scvi7yXoAAFkr-hpxcE327.jpg "Title =" 2.jpg" alt = "wKioL1Q3scvi7yXoAAFkr-hpxcE327.jpg"/> You can see that the two interfaces 0/1 and 0/0 have reached the full status with the other interface, and both of the three routes have reached the full status. The OSPF of the three routes in a single regi

Because Dr Mode, VS/DR is only responsible for data forwarding, and the return of the data is returned by the back-end server directly to the client, thereby reducing the VS/DR load, so Dr Mode is the first choice for most companies.The following is the official network topology for

30, it takes over the service resources of the master node immediately.Warntime 10 // specifies the heartbeat delay time to 10 seconds. When the backup node cannot receive the heartbeat signal of the master node within 10 seconds, a warning log is written to the log, but the service is not switched.Initdead 120 // On some systems, after the system is started or restarted, it takes some time for the Network to work normally. This option is used to solve the time interval generated in this case.

. # Configure/etc/keepalived on the master server. confglobal_defs {icationication_email {leekexi@gmail.com # multiple addresses} icationication_email_from leekexi@gmail.com smtp_server smtp.gmail.com smtp_connect_timeout 30 router_id lvs_devel} # monitor ipvsadm Process status, run vrrp_script chk_rjsadm {script "/usr/local/keepalived/chk_1_sadm.sh" interval 3 weight 3} vrrp_instance vi_1 {state master # indicates that the master backup machine is backup interface eth0 every 3 seconds. virtual_

Address: http://www.cnblogs.com/mchina/archive/2012/05/23/2514728.html I. Introduction LVS is short for Linux virtual server, which is a virtual server cluster system. This project was established by Dr. Zhang Wenyu in May 1998 and is one of the earliest free software projects in China. Currently, three IP Server Load balancer technologies are available (Vs/NAT, VS/TUN, and VS/DR ); ten scheduling algorithm

Detailed configuration of Server Load balancer in lvs dr mode in CentOS 1. Prepare for LVS installation: 1. Prepare four Centos 6.2 x86_64 Note: SELinux and IPtables firewalls are disabled in this experiment. Management IP address role remarks 192.168.1.101LVS Master scheduler (Master ctor) provides external services with VIP 192.168.1.180192.168.1.114LVS slave scheduler (Backup Director) which can be used as RS (Real Server) 192.168.1.20.rs1 (Real Se

Dr Mode question and answer:1. In Dr Mode, the director, Realserver are bound to the VIP, why the front-end ARP broadcast only the director response?Answer: Because you want to set the Echo 1 >/proc/sys/net/ipv4/conf/lo/arp_ignore on Realserver, echo 1 >/proc/sys/net/ipv4/conf/all/arp_ Ignore this, realserver to the VIP radio.2. In DR Mode, Realserver does not pa

Original address:Http://www.chenqing.org/2012/11/%E3%80%90lvs%E3%80%91lvs%E5%B7%A5%E4%BD%9C%E6%80%BB%E7%BB%93%E4%B9%8B%E5%8E%9F %e7%90%86%e7%af%87.htmlThere are other patterns in the blog and a summary of the principles of keepalived. This article summarizes and collates itself,own summary of the place red callout。=============================================================================================================== =======================first explain a few nouns:LB (Load Balancer): Loa

dip(2) After the DR client requests the director's VIP, the message is forwarded to the backend server through the director, it originates from the destination address unchanged, is still the CIP and VIP, and only changes the message of the two-tier MAC address for the director designated distribution of the MAC address of the RS, When the message returns, its source and destination address are VIP,CIPCharacteristicsAll nodes of the cluster must be i

# (LVS algorithm) lb_kind dr # (Direct Route) persistence_timeout 60 # ( The same IP connection is assigned to the same realserver in 60 seconds Protocol tcp # (check realserver status with TCP protocol) #实际服务器的IP和端口 real_server 10.0.0.5 21 { weight 5 Tcp_check { connect_timeout 10 nb_get_retry 3 Delay_before_retry 3 connect_port 21 } } #实际服务器的IP和端口 Real_server 10.0.0.6 { weight 5 Tcp_check { connect_timeout 10 nb_get_retry 3 De

For convenience, I made another diagram based on the official schematic diagram, as shown in: VS/DR architecture: I will explain the principle of LVS-DR based on this schematic diagram and specific examples, including the data packet, data frame direction and conversion process. Official principle: Director receives user requests andAlgorithmSelect a RealServer, forward the package, and then the Real

DBD: mysql: dr: imp_data_size unexpectedly, dbdimp_data_size The latest MHA verification encountered the error DBD: mysql: dr: imp_data_size unexpectedly. The DBD package has been installed. The following describes the problem and solutions. 1. fault description# Masterha_check_repl -- conf =/etc/app1.cnfMon Feb 16 19:56:29 2015-[warning] Global configuration file/etc/masterha_default.cnf not found. Skippi

Configure the lvs dr mode on 192.168.1.101 and 192.168.1.114 respectively. 1) Configure LVS and create a script to configure LVS Note: The configuration on 192.168.1.101 and 192.168.1.114 is the same. [Root @ centos1 bin] # vim lvs_dr.sh #! /Bin/bash ./Etc/init. d/functions Vim lvs_dr.sh #! /Bin/bash GW = 192.168.1.1 # Website director vip. SNS_VIP = 192.168.1.181 SNS_RIP1 = 192.168.1.103 SNS_RIP2 = 192.168.1.104 Logger $0

DR:cluster nodes andDirectormust be in the same physical network;The backend server (real server) can use the public network address to realize convenient remote management and monitoring;The Director is only responsible for processing inbound requests, and the response messages are sent directly to the client by Realserver;Port mappings are not supported;Prepare 3 servers, one to do forwarding, 2 to do the sub server, as follows: N Ode1 vip:192.168.252.200 dip:192.168.2