barracuda virtual load balancer

one file. The benefits are simple, possibly as long as there are few configurations. However, as the number of servers increases, it becomes very difficult to monitor log files on each server. 2. Logging to a share this method is still available for each server, but they are stored on a central file server through a sharing mechanism, which makes monitoring logs easier. The problem with this scenario is that if the file server is unavailable, a simple log cannot be written to the problem that e

Windows Azure Platform Family of articles Catalog　　This article is more content, please read carefully, thank you!In the first few chapters, we did the preparatory work:1. Create Arm resouce Group, called Leiresourcegroup2. Create Arm Storage account, called Leistorageaccount3. Create arm Virtual Network, called LeiarmvnetIn this chapter, I will show you how to create VM VMs in arm mode. It is mainly divided into the following steps:1. Creating the fi

realserver 1 ", the webpage information provided by 192.168.24.45 is "welcome realserver 2" # ipvsadm-A-t 172.16.100.24: 80-s rr # ipvsadm-a-t 172.16.100.24: 80-r 192.168.24.44-m # ipvsadm-a-t 172.16.100.24: 80-r 192.168.24.45-m # ipvsadm-L-n -- view the defined rules. These rules are temporary rules, it will not take effect permanently. To save the rule permanently, run the following command: # service ipvsadm save 5. access 172.16.100.24 in the Internet Explorer, as shown in: If you access 17

bindings on the RS side, do not set 0 even if the VIP bindings are stoppedif [${#VIP [@]}-le 1];thenecho "0" >/proc/sys/net/ipv4/config/lo/arp_ignoreecho "0" >/proc/sys/net/ipv4/config/lo/arp_announceecho "0" >/proc/sys/net/ipv4/config/all/arp_ignoreecho "0" >/proc/sys/net/ipv4/config/all/arp_announceFi Inspection of the service provided by the RS node itself Auxiliary exclusion Tool Tcpdump Ping Load balancing and reverse proxy clusters

Article Title: instance resolution: Lvs Server Load balancer experiment in a virtual machine. 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. Environment, three virtual machine syst

Nginx Installation notes (including PHP support, virtual host, Reverse Proxy Server Load balancer) 2008-10-11 tsengyia # 126.com Nginx is said to be superior to Apache in terms of high performance and stability, strong concurrent connection processing capability, and low system resource consumption. Currently, more than 2.5 million of web sites are in useHttp://s

/wKiom1dQUfvCzwTqAADs1KJbOBY487.png-wh_500x0-wm_3 -wmp_4-s_1262885480.png "title=" 4.png "alt=" Wkiom1dqufvczwtqaads1kjboby487.png-wh_50 "/>4.ifconfig get the NIC IP and copy the eth0 NIC configuration file as the eth1 NIC configurationCp/etc/sysconfig/network-scripts/ifcfg-eth0/etc/sysconfig/network-scripts/ifcfg-eth1The edit configuration file is configured as followsDevice=eth1Type=ethernetOnboot=yesNm_controlled=yesBootproto=staticipaddr=192.168.17.136 (IP here can be set with your eth0)5. R

Load BalancerIpvs:http://kb.linuxvirtualserver.org/wiki/ipvsNat:http://kb.linuxvirtualserver.org/wiki/lvs/natVip:http://kb.linuxvirtualserver.org/wiki/vipArp:http://kb.linuxvirtualserver.org/wiki/arp_issues_in_lvs/dr_and_lvs/tun_clustersTun:http://kb.linuxvirtualserver.org/wiki/lvs/tunHttp://www.linuxvirtualserver.org/VS-IPTunneling.htmlDr:http://kb.linuxvirtualserver.org/wiki/lvs/drHttp://www.linuxvirtualserver.org/VS-DRouting.htmlFnat:[Network] Ipvs

Worker_processes 2;Events {Worker_connections 1024;}HTTP {Include Mime.types;Default_type Application/octet-stream;Sendfile on;Keepalive_timeout 65;#nginx vhosts ConfigUpstream REST_LC {#ip_hash;Server 192.168.1.240:8080;Server 192.168.1.244:8080;#sticky name=srv_id expires=1h domain=www.lc.com path=/;}Upstream WAP_LC {#ip_hash;Server 192.168.1.240:8081;Server 192.168.1.244:8081;#sticky name=srv_id expires=1h domain=www.lc.com path=/;}Upstream ACTIVITY_LC {#ip_hash;Server 192.168.1.244:8082;Serv

configuration file is divided into six main areas:Main (Global Settings), events (nginx working mode), HTTP (HTTP settings),Sever (Host settings), location (URL match), Upstream (Load balancer server settings). Main module Below a main area, he is a global setting: User nobody nobody; Worker_processes 2; Error_log/usr/local/var/log/nginx/error.log notice; Pid/usr/local/var/run/nginx/nginx.pid; Worker_rlimi

operations; 3) read-only server load balancer is scalable. Disadvantages: 1) high reliability without write operations; 2) load balancing without write operations; 3) No scalability in write operations; Speed: 1) same as a separate server; better support for reading operations Application scenarios: 1) Read-intensive applications that require high reliability an

applications that require high reliability and load balancing. 5. Standalone MySQL Servers (Functionally separated) (Active) Multiple independent servers with separated functions do not have high reliability and load balancing capabilities. They have many obvious disadvantages and are not considered. Summary: The HA solution recommended on the official MySQL website is combined with DRBD (solution 3 in thi

Lvs IP Server Load balancer technology, lvsip Server Load balancerGeneral structure of the Lvs Cluster The Lvs cluster adopts the IP Server Load balancer technology and belongs to the IP layer switching (L4), which has a good throughput. The scheduler analyzes the IP header

(layer-4) and HTTP (layer-7), and virtual hosts are supported;2. It can supplement some shortcomings of Nginx, such as Session persistence and Cookie guidance.3. It is helpful to detect problems on the backend servers using URLs.4. More Load Balancing policies, such as Dynamic Weighted Round Robin and Weighted Source Hash ), the Weighted URL Hash and Weighted Parameter Hash have been implemented.5. In term

is used, the Session should not be stored in the process. You must use StateServer or SqlServer for storage. If you stick to the storage in the process, you can choose to use the Client affinity (Client affinity), that is, all requests of the customer have the same server for response and will not be forwarded to other servers, this sacrifices reliability. When the server fails, the request cannot be forwarded to other servers for service. The result is that the client request has no response.

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 write down, convenient for you to read the studyThis experiment requires the installation of Nginx if not installed, please refer to:Linux installation nginx:http:/

Build a mysql Server Load balancer and a high-availability environment and a mysql Server Load balancer Objective: To use two hosts to achieve Mysql load balancing and redundancy, and achieve dual-master-slave mutual backup; Environment: rhel5.8, mysql-5.0.77, keepalived-1.2

capability. However, some data shows that most vswitches no longer have a layer-4 switching capability at such a high speed, only layer-3 or layer-2 exchange is supported. 　 However, for most sites, the current load balancing mainly solves the bottleneck of the Web server's processing capability, rather than the network transmission capability. The total Internet connection bandwidth of many sites is less than 10 MB, only a few sites can have high-sp

requirements, in addition, line upgrades are too expensive or even difficult to implement. In this case, we can consider using the trunking technology. Link aggregation technology (Layer 2 load balancing) uses multiple physical links as a single aggregation Logical Link. network data traffic is shared by all physical links in the aggregation Logical Link, this increases the capacity of the link logically so that it can meet the demand for increased b

server load balancer: the real physical server is returned to the server load balancer. There are two methods: (1) the server load balancer modifies the source address while modifying the destination IP address. Set the source ad