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Anonymous users2024-02-061. The service returns directly: the LAN port of the load balancer is not used in this installation method, the WAN port is in the same network as the server, the client of the Internet accesses the virtual IP (VIP) of the load balancer, the virtual IP corresponds to the WAN port of the load balancer, and the load balancer distributes the traffic to the server according to the policy, and the server directly responds to the client's request.
2. Bridge mode: The bridge mode is simple to configure and does not change the existing network. The WAN port and LAN port of Server Load Balancer connect to the uplink device and the downlink server, respectively.
The LAN port does not need to be configured with an IP address (the WAN port and the LAN port are bridged connections), and all servers and load balancers are in the same logical network.
3. Routing mode: The gateway of the server must be set to the LAN port address of the load balancer, and the logical network is different from the WAN port sub-office. As a result, all returned traffic is also load balanced.
This approach requires minimal network changes and balances any downstream traffic.
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Anonymous users2024-02-05Load balancing is divided into hardware load and software.
1.In terms of hardware, F5 can be used as a load, and dozens of algorithms are built-in.
2.In terms of software, you can use reverse servers, such as apache, nginx and other highly available reverse servers.
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Anonymous users2024-02-04Load balancing means having several servers or services. Through the device or software, the external connection is evenly distributed to these servers or services. Equalize the load on the server.
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Anonymous users2024-02-03This question is more general.
In the server operating system after win2k advanced server (inclusive), there is a load balancing in the network card attributes, which can realize network card balancing. There are also some professional load balancing devices. It is recommended that you search for a lot of related knowledge of Baidu, and also recommend the magazine "Windows International Chinese Edition", which previously detailed the instance of load balancing under 2K advanced servers.
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Anonymous users2024-02-02Load balancing: Load balancing and distribution across multiple operating units for operation.
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Anonymous users2024-02-01When a large number of clients access the IP address of the virtual service from the outside, the load balancing device will distribute these packet requests to the background server according to the load balancing algorithm to balance the load pressure of each server, so as to avoid slow operation or even downtime when other services reach the performance critical point when the server pressure is small. In order to improve the efficiency and quality of service, the IP address of RS is the VIP address of the load balancer device for the client, and the real IP address of the RS server is invisible to the client.
What Are the Three Types of Load Balancers?
The first type: reverse mode.
When the Server Load Balancer receives a client request, it records the packet and changes the destination address of the packet to the IP address of the preferred RS device, and the destination port number remains unchanged, and the source address is changed to the IP address of the downlink interface between the Server Load Balancer device and the corresponding RS device, and the source port number is randomly sent to the RS device. When RS receives the packet, the RS responds to the RS interface IP address and the destination IP address to the SLB, which changes the source to VIP, the destination port number to the source port number of the client, and the destination IP address to the source IP address of the client.
The second is the transparent transmission mode.
When the SLB is working in transparent transmission mode, RS cannot detect the existence of the SLB and the IP address of the RS is the VIP address of the SLB for the client. In this mode, when the SLB receives a packet with the source IP address of the client and the destination IP address of the local VIP address, the SLB device sends the packet to the optimal RS device according to the load balancing policy and monitoring status, and then the RS device receives a request packet with the destination IP address of the client and the actual IP address of the client, and then RS directly responds to the request, and the destination IP address of the packet is the IP address of the client. Change the source IP address to a VIP address and send packets to the client.
The third type: triangular mode.
In triangular mode, when a client sends a request to a load device, the load balancer calculates the optimal RS and sends the packet to the RS based on the MAC address, and sets the source IP address of the packet to the VIP address on the RS. Because the transmission path of the message resembles a triangle throughout the process, it is called a triangle pattern.
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