sticky connections load balancing

. Azure load Balancing currently supports three distribution modes:1, five-tuple,2, Ternary,3, two-tuple. load Balancing set on the portal defaults to a five-tuple (source IP, source port, Destination IP, destination port, protocol type) to calculate the hash value. If a two-tuple (source IP, Destination IP) Distributi

Rotten mud: TCP application for learning haproxy with high load balancing, and load balancing haproxy This document consistsIlanniwebProviding friendship sponsorship, first launchedThe world In the previous articles, we introduced the configuration parameters of haproxy, And the configuration examples are all http pro

upper limit, and there is basically no consumption in memory and CPU. 2. Low configuration, which is usually a major disadvantage, but it is also a major advantage. because there are not many configurable options, you do not need to touch the server frequently except increase or decrease the server, this greatly reduces the likelihood of human error. 3. Work is stable. Because of its strong load resistance capability, high stability is also a logic.

Balancer device settings of the server selection method, determine the final choice of internal server.For example, in the case of TCP, the load balancing device can only accept the message of the real application layer content sent by the client after the server is selected by the actual application layer and then the client must establish a connection (three handshake), and then according to the specific

HTTPD load Balancing Tomcat implements the session sticky and session cluster architecture as follows:650) this.width=650; "src=" Http://s4.51cto.com/wyfs02/M00/88/6C/wKioL1f3ajTxPkM9AADT2sKTejY987.png "title=" Session frame composition. png "alt=" Wkiol1f3ajtxpkm9aadt2sktejy987.png "/>The implementation process is as follows:Configuring the Tomcat Service (TOMCA

server according to the cyclic schedule sequence. minimum connection. the least-connection algorithm sends the request to the server, depending on which server in the cluster is currently processing the fewest number of connections. based on load. the load-based algorithm first determines which server in the cluster has the lowest current

), minimum number of connections (Least Connections first), and fast response priority (Faster Response precedence).① round-robin algorithm is to assign requests from the network to the nodes in the cluster for processing.The ② minimum number of connections algorithm, which is to set up a register for each server in the cluster, records the current number of

time is short of priority allocation. upstream Backserver {server server1;server server2;Fair;}5. Url_hash (third party)assign requests by the hash result of the access URL so that each URL is directed to the same back-end server, which is more efficient when the backend server is cached. upstream Backserver {server squid1:3128;server squid2:3128;hash $request _uri;Hash_method CRC32;}in servers that need to use load

balancer device will not forward the subsequent connections to this server, but instead forwards the packets to other servers based on the algorithm. When you create a health check, you can set the check interval and the number of attempts, such as setting the interval to 5 seconds, the number of attempts is 3, then the load Balancer device initiates a health check every 5 seconds, if the check fails, the

principles of distributed architecture design, session best put to the data tier storage) 4) ... load balancing of the "Site Layer-> service layer" The load balancing of the site layer to the service layer is implemented through the service connection pool. The upstream connection pool establishes multiple

for service delivery. Since the performance of a single server is always limited, multiple servers and load balancing techniques must be used to meet the needs of a large number of concurrent accesses. The first load balancing technology is implemented through DNS, in DNS for multiple addresses to configure the same

JBoss-4.2.3GA + Apache load balancing and cluster solution configuration process (22:36:46) FromHttp://blog.sina.com.cn/s/blog_4c925dca0100qh2l.htmlThe company needs to implement load balancing and cluster requirements for Apache + JBoss, but Atang had no experience in this field and started a two-day pioneering journe

-HashKeyword. Each internal address is always converted to the same conversion address. Inbound Server Load balancer The address pool can also be used to achieve Load Balancing for inbound connections. For example, the inbound web server connection can be allocated to a group of servers: web_servers = "{ 10.0.0.10, 1

of a single server is always limited, multi-server and load-balancing techniques must be used to meet the needs of a large number of concurrent accesses. The first load-balancing technology is implemented through DNS, in DNS for multiple addresses configured with the same name, so the client queried the name will get

the performance of a single server is always limited, multiple servers and load balancing techniques must be used to meet the needs of a large number of concurrent accesses. The first load balancing technology is implemented through DNS, in DNS for multiple addresses to configure the same name, so the client queried

process of personal growth.Three, load Balancing algorithmCommon load balancing algorithms include, polling, random, least link, source address hash, weighting, etc.3.1 PollingDistribute all requests, in turn, to each server, which is appropriate for the same scenario as the server hardware.Advantage: The number of se

of a single server is always limited, multi-server and load-balancing techniques must be used to meet the needs of a large number of concurrent accesses. The first load-balancing technology is implemented through DNS, in DNS for multiple addresses configured with the same name, so the client queried the name will get

Load balancer solution directly installs Server Load balancer devices between servers and external networks. This type of device is usually called Server Load balancer. dedicated devices perform specialized tasks and are independent of the operating system, the overall performance has been greatly improved, coupled with a variety of

balancer, but also through a number of proprietary software and protocols to achieve. In the OSI seven layer protocol model, the second (data link layer), third (network layer), fourth (transport layer), layer seventh (application layer) have corresponding load Balancing strategy (algorithm), the principle of load balancing