hardware load balancer comparison

Reprint: http://www.zyan.cc/f5_big_ip/In the recent comparison of testing the performance of F5 big-IP and Citrix NetScaler load balancers, write this article to document the common application configuration methods for F5 big-IP.Currently, many vendors have launched a load balancer dedicated to balancing server

: Each request from the network is distributed to each internal server in turn, starting from 1 to n and then restarting. Example: This balancing algorithm is suitable for all servers in the server group with the same hardware and software configurations and Relatively Balanced average service requests; -Least connection algorithm (least connection ): Note: Each time the client requests the service to stay on the server, there may be a big diff

, its processing capability and computing strength also increase accordingly, making it impossible for a single server device. In this case, if you discard the existing device to perform a large number of hardware upgrades, this will cause a waste of existing resources, and if you face the next increase in business volume, this will lead to a high cost investment for another hardware upgrade, and even devic

. Request Routing decisions made based on HTTP requests Unlike Hardware load balancing (the Request Routing Method is determined at the OSI model's IP layer), ARR performs Load Balancing Based on the application layer, because more information is available at the application layer (in fact, it is necessary to clarify the principle of Server

-machine interoperability" and so on.2. Load Balancer cluster (load Balance Cluster)LBProvides a load capacity that is proportional to the number of nodes, which is suitable for services that need to provide heavy load traffic, such as the web. The more famous of these clust

When it comes to the Web cluster, we can't help but say that LVs is a very good open source software for load cluster, compared with some hardware load, LVS has many excellent performance, such as cheap, stable, support high concurrency scenarios in most cases, below to tell you about the origin of LVS and basic introductionI. The concept of LVSLVS is the abbrevi

column: select host and fill in the squid server's Internet virtual IP (VIP): 61.1.1.3③ Fill in the service port field: 80 (2) Configuration:① Select advanced in the configuration column (this step is very important to select Advanced Mode)② Select performance (Layer 4) in the type column)③ Select none in the SNAT pool column (Note: This step is very important. In layer-4 mode, make sure this option is set to none) (3) resources:① Select pool_squid in the default pool bar. Note: layer-4 Server

control can improve network performance. Currently, products and solutions using layer-7 switching technology include iSwitch, switches, and Cisco CDN (content exchange network system) of dawn network.Server Cluster Solution In some cases, for example, a website's internal staff and external customers use the website at the same time, the company needs to connect the service requests of internal staff to a slow server to provide more resources for external customers. In this case, the Web conte

not balanced, so DNS round robin is suitable for load balancing with low reliability requirements, such as slice server clusters and pure static web server clusters. (3) layer-4/layer-7 server load balancer usually works with layer-4 or layer-7 OSI of OSI: Open System Interconnection) layer-7 data format functions and connection methods an interface gateway Pres