sticky connections load balancing

added to TCP/IP. Solution : If you do not configure your cluster with NLB Manager, you must manually configure TCP/IP with the IP address of the cluster. cause : A host is leaving the cluster because the drainstop or Stop command was used, but the aggregation did not complete properly. solution : Wait for the aggregation to complete. If aggregations are not complete, see the following questions in the troubleshooting topic:Cluster hosts start aggregations after they are

multiple internal IP addresses, and dynamically use one of the internal addresses for each TCP connection request for load balancing purposes. Many hardware vendors integrate this technology into their switches as a function of their fourth exchange, typically using random selection, load balancing policies based on t

cluster nodes according to certain rules through a single-shot irreversible HASH function. When other types of balancing algorithms are not very effective, the hash method displays special sessions. Due to the rotation method and other types of connection information-based algorithms, the start and end mark of a session cannot be identified, which may cause application confusion.The hash ing based on the data packet source address can solve this prob

, coupled with the Load Balancer Device Settings Server selection mode , determine the final choice of internal servers. Take the common TCP, for example, if the load balancing device is to select a server based on the actual application tier content, it can only proxy the final server and the client to establish a connection (three handshake) before it can acc

powerful when several other balancing algorithms are not very effective. For example, in the case of UDP sessions mentioned above, due to the rotation method and other types of connection information-based algorithms, the starting and ending tags of sessions cannot be identified, which may cause application confusion. The hash ing based on the data packet source address can solve this problem to some extent: send data packets with the same source add

proxy server can forward requests to internal Web servers. if the proxy server can evenly forward requests to multiple internal servers, the server load balancer can be achieved [2]. In reverse proxy mode, you can apply the optimized load balancing policy to access the idle internal server each time to provide services. However, as the number of concurrent

the same source address to the same server node, this allows transactions based on high-level sessions to run in an appropriate manner. The hash Scheduling Algorithm Based on the target address can be used in the Web Cache cluster. All access requests directed to the same target site are sent to the same Cache service node by the Load balancer, to avoid the Cache update problem caused by missing pages.3.3 least connection methodIn the least connectio

operation.(2) Proxy server load balancing using a proxy server, you can forward the request to the internal server, using this acceleration mode can obviously improve the access speed of static Web pages. However, it is also possible to consider a technique that uses a proxy server to forward requests evenly to multiple servers to achieve load

Load BalancerIt can be a dedicated device or an application that runs on a common server. Distribute requests to servers that have the same content or provide the same services. Special purpose devices are generally only Ethernet interfaces, which can be said to be a multi-layer switch. The load balancer is typically assigned a virtual IP address, and all requests from the client are done for the virtual IP

from the entire LVS structure, director server is the core of the entire LVS, currently, the operating system for director server can only be Linux and FreeBSD, The linux2.6 kernel can support LVS without any setup, and FreeBSD as a Director server is not a lot of applications, performance is not very good. For real Server, almost all system platforms, Linux, Windows, Solaris, AIX, BSD series can be very well supported.3.4 Balancing StrategyLVS suppo

The difference between four and seven layers of load balancing four layersThe so-called four layer is the fourth layer in the ISO reference model. Four-layer load balancing is also called four-layer switch, it is mainly through the analysis of IP layer and TCP/UDP layer of traffic implementation based on IP plus port

if you set ratios at 3:2:1:1 for your four servers and that's what's the queue would look like–3 entries for the first Ser Ver, the second, one for the third and fourth. In this version, the weights was set when the load balancing was configured for your application and never change, so the S Ystem'll just keep looping through that circular queue. Different vendors use Different weighting systems–whole num

Tasks reasonablyNeither HTTP redirection nor DNS load balancing can achieve true load balancing, which means that the dispatch server cannot allocate tasks based on the actual load of the back-end servers. However, the reverse proxy server supports manually setting weights

setting the weight ratio.2. Minimum connection algorithm (Least Connection)When NetScaler uses the least-connected load-balancing algorithm, it is allocating new connection requests to the server with the smallest number of current connections. The minimum connection algorithm is a dynamic scheduling algorithm, which estimates the server

service provision. Because the performance of a single server is always limited, multi-server and load balancing technologies must be used to meet the needs of a large number of concurrent accesses. The earliest load balancing technology was implemented through DNS. In DNS, the same name is configured for multiple a

acceleration mode can obviously increase the access speed of static Web pages. Therefore, you can also consider using this technology to allow the proxy server to evenly forward requests to one of multiple internal Web servers, so as to achieve load balancing. This proxy method is different from the common proxy method. The standard proxy method is that the customer uses the proxy to access multiple extern

provision. Because the performance of a single server is always limited, multi-server and load balancing technologies must be used to meet the needs of a large number of concurrent accesses.The earliest load balancing technology was implemented through DNS. In DNS, the same name is configured for multiple addresses. T

The most commonly used is F5 and Citrix NetScaler Load balancing is divided into global load balancing and local load balancing. Load balancing