Load balancing is a method for distributing workloads across multiple computers, such as a cluster, a Central Processing Unit, network links, or disk drives to optimize resource use, maximize throughput, minimize response time and avoid overload of any one of the resources. By using multiple components that use load balancing, it can increase reliability and speed through redundancy, instead of using a single component to achieve the desired result. The Load balancing is achieved through dedicated software or hardware like a multilayer switch or a domain name switch (DNS) server process. Server farms are just one of many uses that benefit from load balancing. Load balancing allows for a significantly higher fault tolerance level.
When a router learns multiple routes to a specific network via multiple routing protocols, it installs the route with the lowest administrative distance in the routing table. Sometimes the router has to select a route from many different paths along the same routing path with the same administrative distance. In this case, the router chooses the path with the lowest number of instances to its destination. Each routing process calculates its paths differently and the paths may need to be manipulated in order to get the desired load-balancing method.
Network Load Balancing
Network Load Balancing distributes IP traffic to multiple instances of a TCP/IP service, such as a Web server, each running on a host within the cluster. It transparently partitions the client’s request among the hosts and lets the client access the cluster using one or more "virtual" IP addresses. From the client's point of view, the cluster seems to be a single server that answers these client requests. As enterprise traffic increas...
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...y in processing speed and memory then a ratio or weighted method may be the best option. The default method is called round robin. In this method the connection request is passed on to the next server in line, eventually passing the requests evenly across the cluster. It works in most configurations. Ratio is passed around by ratio that is designed specifically for a defined set of rules that are made by the administrator. This allows for a distribution of requests that is defined and is specific to each server speed and memory. There are other ratio methods called Dynamic Ratio Node and Dynamic Ratio Member which are similar to Ratio except the ratio is system driven and which values are not static. Weighted Methods work best when the server’s capacities are different and require a weighted distribution of connection requests (University of Tennessee, 2014).
rapidly chooses how to convey the set of uses and framework servers over different machines in the cloud. Large portions of the conventional parallel applications for the most part utilize an altered number of strings on the other hand procedures characterized as a parameter toward the begin of the application. The choice for the number of strings is frequently chosen by the client in a push to completely use the parallel assets of the framework or to take care of top demand of a specific administration. fos utilizes the duplicated server model which permits extra transforming units to be alterably included amid runtime permitting the framework to attain a finer use for element workloads and lightening the client from such
This is similar to Round Robin, but allows a hierarchy of process. Multiple process queues are used. As long as higher priority one is in the queue, they run first and other lower priority process waits.
A distributed system is a collection of independent computers (nodes) that appears to its users as a single coherent
Deploy clusters with MapReduce,HDFS, Hive,Hive server and , Pig.Fully customizable configuration profile.This includes dedicated machines or share with other work load, DHCP network or Static IP and local storage and shared one.
A network switch is a small hardware device that joins multiple computers together within one LAN.
In order to have a greater understanding of the terminology and descriptions offered in this paper, we must first understand what a network switch is. A brief definition of a network switch is a computer networking device that connects network segments. It uses the logic of a Network bridge, but allows a physical and logical star topology. It is often used to replace network hubs. A switch is also often referred to as an intelligent hub.
Sakellari, G., Morfopoulou, C., & Gelenbe, E. (2013). Investigating the tradeoffs between power consumption and quality of service in a backbone network. Future Internet, 5(2), 268. doi: 10.3390/fi5020268
When it comes to getting network traffic from point A to point B, no single way suits every application. Voice and video applications require minimum delay variation, while mission-critical applications require hard guarantees-of-service and rerouting.
... all of your different hosts and handle the conversion and routing of data between the servers and their virtual disks.
Section 1.4 is basically the author telling us about two important network architectures, the OSI reference model and the TCP/IP reference model. The OSI (Open Systems Interconnection) deals with connecting opens systems, which are systems that talk with other systems. This model has seven layers: the physical layer, the data link layer, the network layer, the transport layer, the session layer, the presentation layer, and the application layer. From this information, we discover that the OSI model is used only for its model (the 7 layers) and not as a network architecture since it doesn’t specify the exact services and protocols to be used in each layer.
Gateways provide nodes with a contactless connection into the resources that are available for the users. The basic gateways that are installed in many pc are called NIC’s or network interface card (Andrews, 2006, pp. 846-847). These gateways can wither be hardware or protocols within the given equipment that in installed. It is essential that data have the ability to transverse the network. However, to accommodate this function, the data needs to be accepted/rejected and/or forward or dropped. For the purpose of connecting nods, networks, and interaction, gateways must be present. Without any form of implementing gateways, communications would be non-existent. However, the term gateway can also be referred to as routers, wiles AP’s, switches, and hubs. This is fairly easy to distinguish as it points to some form of access to the networks resources.
...eed, then the node rediscovers the mesh and stable route. A forwarding node is always present in the network therefore the packet delivery ratio of proposed is high.
In a client-server network, the capability of the server will decline as the amount of clients asking for services from the server increment. In spite of that, in P2P systems overall network performance really enhances as an increasing number of nodes are added to the system. These companions can arrange themselves into a specific purpose groups(ad hoc) as they impart, work together and offer data transfer capacity with another to finish the current workload (sharing of files). Each companion can transfer and download at the meantime, and in a procedure like this, new companions can join the group while old companions leave at whatever time. This active re-association of group peer members is not opaque to ultimate consumer.
Local Area Networks also called LANs have been a major player in industrialization of computers. In the past 20 or so years the worlds industry has be invaded with new computer technology. It has made such an impact on the way we do business that it has become essential with an ever-growing need for improvement. LANs give an employer the ability to share information between computers with a simple relatively inexpensive system of network cards and software. It also lets the user or users share hardware such as Printers and scanners. The speed of access between the computers is lighting fast because the data has a short distance to cover. In most cases a LAN only occupies one or a group of buildings located next to each other. For larger area need there are several other types of networks such as the Internet.
Another large scale network topology would be the Mesh topology. Mesh topologies are either full-mesh or partial-mesh. The full-mesh has each node in the network connected with every node on the network. This configuration ensures the constant ability to transfer data and is truly redundant, but would be very costly to set up. The partial-mesh only connects every other node on the network still allowing for redundancy at a lowered cost and this configuration is commonly used in backbone networks to help ensure they constantly have the ability to transfer data.