dual wan load balancing

Bind two network cards, share one IP, realize the redundancy effect. In fact, there are 7 types of bindings for Linux dual NICs: The mode=0 indicates that load balancing (round-robin) is balanced, and both NICs work. mode=1 says Fault-tolerance (active-backup) provides redundancy, working in a master-slave way, which means that only one NIC works by

of virtualization, cloud computing and "on demand" it. F5 is headquartered in Seattle, WA and has branches around the world.Product Technical Features:1) Load balancing support more comprehensiveBig-IP LTM (local traffic management) includes static and dynamic load balancing methods, including dynamic rate, least-conn

cluster have the same Mac, there is no communication between the nodes in the case of a single NIC, which is one of the reasons why the dual NIC configuration is recommended. In order to avoid data flooding of the switch, it should be used in conjunction with VLANs.Multicast: The network adapter also assigns a multicast MAC address shared by each node while preserving the original MAC address. Therefore, even though the nodes of a single NIC can comm

Introduction: In the Internet application, with the site on the hardware performance, response speed, server stability, data reliability and so on more and more high requirements. A single server is overwhelmed by the large number of accesses. In addition to the use of expensive mainframe and load offload devices, enterprises can also use a different solution. That is to build a load Balancer cluster---Prov

result is also not conducive to the promotion of software. So how do you cross this bottleneck and increase the concurrency of MySQL? There are many methods, such as distributed database, read/write separation, high available load balancing, increasing cache server and so on. The previous article has introduced a read-write separation scheme, and next I will explain MySQL high-availability

Recent Friends Liu Xin website successfully online and operation, PV reached billion/day access, the most front-end use of haproxy+keepalived dual-machine load balancer/reverse agent, the entire site is very stable; it made me more determined haproxy+ Keepalived as the web's most front-end load equalizer Web site architecture design, here I also have a point to t

Small Q: have been trying hard, and occasionally stop to rest, but also cheer up the spirit, continue to work hard,Try my best to realize my desire, dare not hope.We used heartbeat to configure a high-availability cluster, and we configured the load-balancing cluster with LVS, and now we can combine the functions of the two, with the introduction of the high-availability of the other open source software ke

. because there are not many configurable options, in addition to increasing or decreasing the server, you do not need to touch it frequently, greatly reducing the chance of human error.3. Stable Operation Because of its strong anti-load capabilities, high stability is also a logical unit. In addition, various LVS have a complete dual-machine Hot Standby solution, so you don't have to worry about what probl

Nginx configuration system consists of a master configuration file and some other auxiliary configuration files. These configuration files are plain text files, all in the Conf directory under the Nginx installation directory. The line starting with # in the configuration file, or a number of spaces or tabs in front of it, followed by the lines of # are considered comments, meaning that only the user who edits the file is meaningful, and the actual content of the program is ignored when it reads

According to the investigation and analysis by some experts, more than 90% of the databases used by enterprises are mainly used for queries. Some enterprises have a higher proportion. That is to say, the user's operations on the database, in fact, the proportion of update operations is very small. Most of the operations are query operations. For example, in some forums, most users only view the post, instead of posting. This is an example of a typical query operation that greatly exceeds the upd

inconsistent, it is necessary to consider the load balancing problem. nginx itself has the load balancing function, but if the load balancing function is enabled, each machine will cache the data requested by the client to the lo

database server addressStart Amoeba/usr/local/amoeba/bin/amoeba startnetstat -anpt | grep javaTesting the availability of the MySQL client installationyum install -y mysqlLogin test test for normal accessmysql -u amoeba -p123456 -h 192.168.100.130 -P8066 //IP地址为amoeba服务器地址show databases;Test data is synchronizeduse pythoncreate table java (id int,name varchar(10),sorce decimal(5,2)); //在python库中创建java表Log on to each server, the Java tables in the Python library exist, indicating that the

Logical architecture Diagram:650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M02/80/2A/wKiom1c5quXyxNSdAACmHYjI8Ps319.png "title=" 981G] Z8$IWWMW (_v6g9a~1x.png "alt=" Wkiom1c5quxyxnsdaacmhyji8ps319.png "/>Experiment Preparation:Virtual machine: 172.18.250.75 nginx keepalived High-availabilityVirtual machine: 172.18.250.76 nginx keepalived High-availabilityVirtual machine: 172.18.250.77 LAMP memcached ServiceVirtual machine: 172.18.250.78 LAMP sharing memcachedExperimental requirements: T

WebLogic load Balancing can be achieved by means of software and hardware. Hardware can use F5 and other devices, software generally use Apache to achieve. Here's how to use Apache. WebLogic load Balancing can be achieved by means of software and hardware. Hardware can use F5 and other devices, software generally use A

Python implements mysql read/write splitting and load balancing, and pythonmysql Oracle Database has a supporting rac developed by its company to achieve load balancing. Currently, the maximum number of known nodes can reach 128, but the maintenance cost is undoubtedly very high, in addition, rac stability is not parti

In MySQL to achieve read and write separation, load balancing, with Mysql-proxy is very easy, but large-scale processing for performance has yet to be improved, the main configuration steps are as follows:1.1. Mysql-proxy InstallationMySQL Proxy is such a middle-tier agent, simply said, MySQL proxy is a connection pool, responsible for the front-end application of connection requests forwarded to the backgr

Competition is the product of today's society, so there is competition everywhere in the online world. In the world of Server Load balancer, nginx and LVS are comparable. As an open-source product, what do they have? This article will give you a detailed comparison of the two. After the discussion, let's see which one is what you need.Comparison and Analysis of nginx load

of new node. Often used to have a plan to get node offlineWhat is Clago Cluster Link Aggregationo Cross-device link aggregationL2 Cluster2-tier cluster, requiring each node to be in the same 2-tier networkL3 Cluster3-layer cluster, each node can be in a different 3-tier network, that can cross the data centerCluster deployment ScenarioThe value of cluster1, improve business reliability, improve equipment utilization2, weaken the pre-business planning, protection of investment3, simplified manag

The following summarizes a number of real nginx load balancing function, here we add a weight to judge the method is based on the state of the Nginx load allocation of access to the user to the weight of the machine, the specific configuration is as follows. Nginx for back-end Web server (apache,nginx,tomcat,weblogic), such as reverse proxy Several back-end Web

solve the session sharing problem, you can use NFS shared session, the session to write MySQL or Memcache methods, when the machine size is larger, the general use of the session is written into the memcache inside. How the backend Web server is configured we do not discuss this here, the backend server may be apache,nginx,tomcat,lighthttp and so on, the front-end does not care what the back end is.First create a new proxy.conf file to make it easier for us to call later (configure multiple cl