Vl2s implementation leverages proven network technologies, already available at low cost in highspeed hardware implementations, to build a scalable and reliable network architecture. Hamilton navendu jain srikanth kandula changhoon kim parantap lahiri david a. On2k 36, fail to yield a gradually scalable performance. A scalable and flexible data center network modern modular datacenter microsoft chicago center. Maltz parveen patel sudipta sengupta microsoft research abstract to be agile and cost e. In practice, it is common to leave part of the data center network empty to ease future extension. Data center networks are in my way stanford clean slate cto summit james hamilton, 2009. Pdf dataintensive applications that operate on large volumes of data have motivated a fresh. Vl2s implementation leverages proven network technologies, already.
A scalable and flexible data center network sigcomm 2009. Public law 109431, lawrence berkeley national laboratory, 2008. Vl2 uses a scalable, reliable directory system to maintain the mappings between names and locators. Netcom learning, delivers a comprehensive cisco program to address the key areas of data center network design, implementation, and maintenance. A scalable and flexible data center network, cacm, vol. A shim layer running in the network stack on every server, called the vl2 agent, invokes the directory systems resolution service. One is datacenters network topology, we use vl2 as reference. Maltz parveen patel sudipta sengupta microsoft research abstract agility promises improved risk management and cost savings. The authors from microsoft research clearly, had the chance to experiment with real data centre environments and characterise the working conditions.
Zhang, understanding data center traffic characteristics, in. Introductioncloud services are driving the creation of data centers that hold tens to hundreds of thousands of servers and that concurrently support a large number of distinct services e. Vl2 s design is driven by detailed measurements of traffic and fault data from a large operational cloud service provider. A highperformance, servercentric data center network. In 2008, 10 gige switches are on the verge of becoming commodity parts. Data center network dcn holds a pivotal role in a data center, as it interconnects all of the data center resources together. Datacenter network architecture overview conventional datacenter network cisco. Although dcell has good fault tolerance, it does not implement the strategy of the data object placemen and query. A scalable and flexible data center network consolidate layer2layer3 into a virtual layer 2 separating naming and addressing, also deal with dynamic. In response, new data center architectures such as fattree, vl2 and dcell have emerged. As a result, vl2 networks can be deployed today, and we have built a working prototype. Data center network topologies raj jain washington university in saint louis saint louis, mo 63.
A scalable, flexible, and highperformance data center network ye yu, student member, ieee and chen qian, member, ieee abstractthe increasing need of cloud and big data applications requires data center networks to be scalable and bandwidthrich. Towards effective security management in largescale. A scalable and flexible data center network perspectives. A hybrid optical packet and wavelength selective switching. Towards a next generation data center architecture. Todays data centers are constrained by the interconnection network. Wren 09 proceedings of the 1st acm workshop on research on enterprise networking. Many traditional data center network architectures although provide excellent scalability e. From distributed to centralized networking in the datacenter. A scalable, commodity data center network architecture, m.
Dynamic distributed flow scheduling with load balancing for. We evaluatethe performance of the di rectorysystem in5. In this paper, we present livesec, a scalable and flexi ble security management. Data centre lecture 6 advanced topics in networking. We present a genetic algorithm to make better use of the resources.
A novel method of faulttolerant decentralized lookup. Maltz, parveen patel, and sudipta sengupta microso research changhoon kim tenets of cloud. A novel method of faulttolerant decentralized lookup service. Figure shows the probability density function as a fraction of time for the number of concurrent ows going in and out of a machine, computed over all, monitored machines for a representative days worth of ow data. However, the number of servers in the data center network becomes increasingly huge, because of the continuous growth of the application requirements. Data center challenges building networks for agility. A scalable and flexible data center network sigcomm. Jan 01, 20 theophilus benson, ashok anand, aditya akell, and ming zhang, a. Traditional routing and forwarding protocols in data center usually rely on static hashing, and may cause avoidable bottlenecks.
A scalable and flexible data center network consolidate layer2layer3 into a virtual layer 2 separating naming and addressing, also deal with dynamic loadbalancing issues. Tomeetthesegoals,wepresentvl2,apracticalnetworkarchitecture that scales to support huge data centers with uniform high capacity between servers, performance isolation between services, andethernetlayer. The aim of the vl2 paper is to build a scalable and flexible data centre network. A scalable and flexible data center network microsoft. A scalable faulttolerant layer 2 data center network fabric. The goal of virtualization is to improve scalability by centralizing tasks of a. The lightweight virtualization technique has made virtual machines more portable, efficient and easier to management. Optical switching in nextgeneration data centers by.
Vl2 uses 1 flat addressing to allow service instances to be placed anywhere in the network, 2 valiant load balancing to spread traffic uniformly across network paths, and 3 end systembased address resolution to scale to large server pools without introducing complexity to the network control plane. Hidden markov modelbased load balancing in data center networks. Traffic in todays data center networks grows rapidly. The core objective of a data center network is to maintain the utilization of the data center servers at a uniformly high level, and doing so requires agility. Such partially equipped data center is usually highly. Brief characterization of mega cloud data centers costs painpoints with todays network traffic pattern characteristics in data centers vl2. A scalable and flexible data center network summary. To be agile and cost effective, data centers should allow dynamic resource allocation across large server.
Network tenant vm tenant vm service vm service vm trunk between data centers implemented by hypervisor of shared machine link inside a data center tors and other switches can be here, too this is like vl2, except. Data center networking, optical circuit switching, hybrid network. To meet these goals, we present vl2, a practical network architecture that scales to support huge data centers with uniform high capacity between servers, performance isolation between services, and. Maltz, parveen patel, and sudipta sengupta microsoft research changhoon kim. Vl2s implementation leverages proven network technologies, already available at low cost in high speed hardware implementations, to build a scalable and reliable network architecture. To meet this goal, we present vl2, a practical network architecture that scales to support huge data centers with uniform high capacity between servers. Vl2s design is driven by detailed measurements of traffic and fault data from a large operational cloud service provider. And results show that our algorithm performs better than a recent. Our goal is to minimize the maximum single link utilization of the network. Evaluation of data centre networks and future directions. Vl2 copes with the high di vergence and unpredictability of data center traffic matrices by using valiant load balancing vl2 is based on ip routing and forwarding technologies that are already available in commodity switches.
A live migration algorithm for containers based on resource. A robust data center dc network must satisfy several goals. Vl2 has much more detail about efficient communication within a data center. However, in some sense, figure 2understates the dif. With the wide application of cloud computing, the scale of cloud data center network is growing.
Results of empirical evaluations of our placement scheme compared to existing network based placement schemes show a reduction. Data center networks are one of these components, and its relative power consumption rises as innovations in other sectors reduce the power draw of other data center components. Oversubscription forces services to reserve hosts for locality. Networking the cloud in my view, we are on the cusp of big changes in the networking world driven by the availability of highradix, lowcost, commodity routers coupled with protocol innovations. Data center is a pool of resources computational, storage, network interconnected using a communication network. In particular, the data center network should enable any server to be assigned to any service. The performance improvement of cloud computing faces great challenges of how to connect a large number of servers in building a data center network. Data center costs importance of agility todays data center network a better way. Harnessing path diversity for laser control in data center.
Using the software, you can also modify the basic network information including ip address, subnet mask, gateway, etc. Datacenter networking infrastructures rely on power hungry devices to operate. A live migration algorithm for containers based on. Vl2 s design is driven by detailed measurements of traffic and fault data from a large operational. While the switches in data centers today consume 510% of the overall data center power, we estimate that with the. A genetic algorithm for flow scheduling in data center. The virtual machine vm live migration technology is becoming more crucial in cloud data centers for the purpose of load balance, and efficient utilization of resources. Vl2 ensures agility by establishing reachability without addressing and routing con. A scalable and flexible data center network mosharaf. We evaluate the merits of the vl2 design using measurement, analysis, and experiments. Abstractlarge scale data centers form the core infrastruc.
Proceedings of the acm sigcomm 2009 conference on data communication acm, 2009, pp. For data center network administrators who desire t. Vl2s implementation leverages proven network technologies, already available at lowcost in highspeed hardware implementations, to build a scalable and reliable network architecture. Some data center network designs use direct servertoserver connection in regular topologies to achieve. Greenberg, hamilton, jain, kandula, kim, lahiri, maltz, patel, sengupta. Design of an enterprisegrade softwaredefined datacenter network. Hamilton, navendu jain, srikanthkandula, changhoon kim, parantaplahiri. Dcns need to be scalable and efficient to connect tens or even hundreds of thousands of servers to handle the growing demands of cloud computing.
Introduction cloud services need data centers with hundreds of thousands of servers and that concurrently support a large number of distinct services. However, the so ware and operating systems on data center servers are already extensively modi ed e. When services or vms wish to send traffic, the vl2 encapsulates the packets in an ipinip tunnel and uses vlb in a clos network on a flowbyflow basis to split load across intermediate backbone switches. Vm hosts add a layer to the networking stack called the vl2 agent. But we are still not using the capacity efficiently. A scalable and flexible data center network march 2011. Their symmetric architecture can provide multiple peertopeer shortest paths between nodes, thereby increasing the data center network throughput to deal with the new demands. Similar to conventional designs, servers in vl2 are initially connected to tor.
Hamilton, navendu jain, srikanth kandula, parantap lahiri, david a. A scalable and flexible data center network acm sigcomm. Jan 01, 2012 dcell is a decentralized, faulttolerant data center network topology. A genetic algorithm for flow scheduling in data center networks. This paper proposes a novel model netcloud of data placement and query for cloud computing in dcn based on dcell. Center network work with albert greenberg, james r. Its topology is a clos network which is also a multirooted tree 10. Data center network topologies ii cornell university. A scalable and flexible data center network microsoft research presented by. Sep 22, 2009 vl2 is a scalable data center architecture to provide uniform high capacity between servers, performance isolation between services, ethernet layer 2 semantics in large data centers, and dynamic resource allocation across large server pools aka agility. A scalable and flexible data center network eecs umich. Softwaredefined networking, edge computing, cloud computing. The rising tide of dataintensive, massive scale cluster computing is.
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