The Cloud-Ready System Network
Today’s competitive business needs are driving the development of cloud-based data centers that are more cost-effective, agile, and scalable than ever before. Cloud computing places higher demands on the system network in areas such as speed, flexibility, virtualization, cost-effective operation and scalability. To meet the technical and business requirements of cloud computing, the networking layer of a cloud must offer high bandwidth and low latency, converged communications and storage, agile networks for virtual machine mobility, massive scalability and manageability and advanced energy efficiency.
The essential attributes of a cloud network include terabit scalability, predictable low latency, non-blocking throughput and high-speed interconnects using 1/10GbE and the emerging 40/100GbE. For example, the new IBM BNT RackSwitch G8264 delivers throughput of up 1.28 Terabits per second and with its single-chip architecture, low latency is delivered across all port combinations. To bring even more bandwidth to the cloud, the RackSwitch G8264 is among the industry’s first top-of-rack switches with 40GbE interconnects.
One of the main advantages of cloud computing is on-demand access to resources, and virtualization plays a key role in providing those resources. IBM System Networking's VMready network virtualization software enables cloud computing infrastructures with mobile, active virtual machines. Cloud computing users can gain even greater advantages from mobile virtual machines when they can be moved securely and with predictable performance not only within a cloud, but over greater distances to connect multiple clouds. Movement between clouds enables applications such as disaster recovery and data replication.
Today, cloud computing environments are deploying IT infrastructure on an unprecedented scale – data centers are expanding from 5,000 to 50,000 and 100,000 servers. For such scale-out architectures, the system network must deliver the high-density networking required to support highly consolidated and massively virtualized data center infrastructures. Today’s “flat” network topologies enabled through standards such as TRILL (Transparent Interconnection of Lots of Links) are key to this scalability.
Power and cooling are some of the biggest expenses of operating a cloud data center. A common estimate for data center cooling and distribution costs is two watts for every single watt consumed by data center equipment and networking gear is 10 to 15% of the entire infrastructure —so choosing the most energy-efficient network components is essential. As clouds grow to thousands of servers and beyond, per-component power savings are magnified into hundreds of thousands of kilowatts.
From a business perspective, the system network architecture for today’s cloud computing applications must support incremental deployment that does not require razing an existing facility and building a new one. And as new pieces of the cloud are fitted into place, IT managers don’t want to be locked into a single-vendor implementation for any aspect of the solution. They want the freedom to select best-in-class hardware and software components, and they want to deploy new capacity as rapidly as possible. For example, IBM has extended Tivoli's virtualization management capabilities so that it can provision and deploy hundreds or thousands of virtual machines an hour for large-scale enterprise cloud implementations.