is going to be, because even though there are some gaps in the execution times of tasks allocated on each CPU, the increase in the number of CPU cores increases the total execution time, with the increase in the size of the CPUs. The difficulty with load balancing is that many of the parallel execution blocks in a program are divided by programmers, and of course it is not difficult to divide the number o
, because even though there are some gaps in the execution times of tasks allocated on each CPU, the increase in the number of CPU cores increases the total execution time, with the increase in the size of the CPUs.
The difficulty with load balancing is that many of the parallel execution blocks in a program are divided by programmers, and of course it is not difficult to divide the number of CPUs, such as
cactiAdvantages of LVS:Good performance, close to hardware equipment network throughput and connection load capacity.LVS's Dr mode, which supports load balancing over a WAN. None of this other load balancing software is currently
One of Linux load Balancing software LVS (concept article)
A brief introduction of LVSLVS is the short name of Linux virtual server, the Linux VM, a free software project initiated by Dr. Zhangwensong, and its official site is www.linuxvirtualserver.org. Now that LVS is already part of the Linux standard kernel, Before the Linux2.4 kernel, the use of LVS must be recompiled to support the LVS function module
transparent to the architecture, and the end user only senses a virtual server. Physical servers can be connected across a high-speed LAN or across a WAN. The most front-end is the load balancer, which distributes the various service requests to the subsequent physical servers, making the entire cluster behave like a virtual server serving the same IP addressThe LVS cluster system has good scalability and
According to the online article collation.Load balancer software LVs (Linux Virtual Server) concept paperLVS is based on the Linux operating system to establish a virtual server, to achieve the load balance between service nodes. It is implemented based on the Linux kernel. The 2.6.X kernel is integrated with the LVS module by default.The implementation of common load b
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F5 Full Name: F5-BIG-IP-GTM Global traffic manager.
is a company called F5 Networks development of the four-seven-layer switch, hardware and software bundles.
It is said to have originally used BSD systems, which are now Linux; hardware is Intel's PC architecture, plus the surrounding network and dedicated acceleration devices.
Of course, to mention the price, are hundreds of thousands of RMB worth.
This baby is the device that is used to manage the d
, the fastest response algorithm does not work very well, because the ICMP packets in the LAN are basically in the 10ms response, not the difference between the nodes; assuming a balance on the WAN, The response time is still of practical significance for the user to select the server at the nearest, and the more dispersed the cluster topology, the more effective the method will be.Such a method is the primary method of advanced
haproxy also run well, stability can be comparable with LVS;Second, according to official documents, HAProxy can run full 10gbps-new benchmark of HAProxy at ten Gbps using myricom ' s 10GbE NICs (myri-10g pci-express), this as a software-level load Balanced, is also more amazing;Third, Haproxy can be used as MySQL, mail or other non-web load balancer, we often use it as MySQL (read)
In order to improve the export bandwidth, many enterprises have applied for broadband multi-line access. However, in actual use, not to apply for more than one line, you can immediately realize the superposition of bandwidth and load balancing. Multi-line bandwidth overlay and line equalization, but also need technical means to implement. In short, multi-line load
Ip_hash.LVS: Using a Linux kernel cluster to implement a high-performance, highly available load-balancing server with good scalability (Scalability), Reliability (reliability), and manageability (manageability).The advantages of LVS are:1. Strong anti-load capacity, is the work in the Network 4 layer only for distribution, No traffic generated , this feature al
technology, and Cisco's Etherchannel technology are all studying the link aggregation technology that binds multiple Nic interfaces of the server, the link aggregation technology virtualizes multiple links into one logical link, which provides a cheap and effective way to expand the bandwidth of network devices and servers and improve network flexibility and availability.
This article introduces the bonding Technology in Linux. This technology is used in Linux 2.4.x kernel. With bonding technol
With the development of information construction in various industries, people put forward higher requirements for the processing ability and high availability of the network server. Especially in highly information-based enterprises, the key network services have become an important part of enterprise generation process, interruption of service means the interruption of production and the loss of opportunity.
Load
backbone network from conventional third layer to comprehensive third-layer, fourth-layer switching function, its unique WAN integration capability and the access control based on layer fourth exchange have played a key role in secure and orderly network data transmission. In addition, Cabletron SmartSwitch router provides different levels of prioritization for specific business application data exchange based on the QoS features of layer fourth swit
server can be a Web server, a mail server, an FTP server , a DNS server, one or more of the video servers, and each real server is connected through a high-speed LAN or across a WAN. In a real-world application, Director server can also be the role of real server concurrently. As can be seen 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,
, not the difference between the nodes, if the balance on the WAN, the response time for the user to choose the nearest server is of practical significance , and the more dispersed the cluster topology, the more effective the method can be. This approach is the primary approach to advanced balancing based on topology redirection.3. 6 Weighting methodWeighted methods can only be used in combination with othe
1. Overview
The interaction between the DHCP Client and the DHCP Server involves both broadcast packets and unicast packets (used during renewal, we know that the general Server Load balancer equipment implements Load Balancing for unicast packet data, so the pure DHCP Client-> DHCP Server architecture basically cannot achieve
Understanding Server Load balancer firstTransferAndForwardingDifferences:
The transfer and forwarding process is similar to whether customers and outsourcing companies need to directly contact each other. If the contact is received by the receiver. Transparency between customers and outsourcing companies means forwarding.Transfer: to transfer data packets from the client to the actual server, you need to know the address of the actual server.Forward:
LVS Load Balancing clusterTypes of clusters1, load Balancing cluster: To improve the corresponding ability of the application system, as far as possible to deal with more corresponding requests, less latency as the target, get the overall performance of high load concurrency
three Alteon servers were used.(2) software:Apache is a well-known HTTP server. Its Two-way proxy/reverse proxy function can also achieve the HTTP load balancing function, but its efficiency is not very good. The other haproxy is purely used to handle Server Load balancer and has a simple cache function.In terms of the built-in Server
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