Cloud Computing is the
use of data center servers and
software networks to
dynamically allocate resources and run Applications for
remote end users. Typically divided into three categories (private, public, and
hybrid) cloud deployments have grown rapidly in recent years, promising cost
savings and greater flexibility over traditional private data centers.
Virtualization is key
for cloud computing. By allowing physical servers to run one or more virtual
machines on demand, cloud architectures offer rapid scaling and efficient allocation
of server resources on the fly.
Cloud technology
including Public Private and Hybrid explained at following article http://streamingcodecs.blogspot.com/2015/10/public-private-and-hybrid-cloud.html
Private cloud refers to cloud infrastructure dedicated to a single company and
accessed by a private network connection, operating on servers managed either
internally or by a third-party provider. For many organizations in highly
regulated industries, private clouds remain the solution of choice. Cloud
infrastructure platforms such as OpenStack offer
a framework for private cloud deployment and management, and a bevy of vendors
have begun releasing supported versions of the open source platform.
The public cloud refers
to services such as Amazon Web Services, which sell server resources (rather
than dedicated physical servers) accessed over a public network such as the
Internet.
Hybrid cloud (sometimes
called “cloud bursting”) is the combination of multiple clouds. For example, a
company could use public cloud services to handle temporary bursts of activity
that exceed private cloud capacity. Some companies also use private clouds for
certain sensitive business units while hosting less critical applications on
the public cloud.
The equally important characteristics to successful cloud
networks including: (from Brocade Open analysis report)
· Scalable and high
performance
· Extensible and
interoperable
· Policy and automation
driven
· Software-centric
· Content-aware
·
Multi-domain/multi-tenant
· Secure
Combining a variety of
virtual and physical components, the networking portion of the cloud solution
is much more complicated and comprehensive than typical networking solutions.
Most clouds include a network orchestration or virtualization piece that
provides abstractions to hide the complexity necessary to maintain and scale
these clouds and make them much more manageable.
Clouds, cloud
networks and related technologies will drive a significant shift in the
networking market in the years ahead.
Agile,
responsive enterprises are built on agile, responsive neatly into this
philosophy. They reduce network complexity, adapt easily to change and enable
you to respond quickly to business needs.
SDNs can trigger a dramatic
revolution in data center efficiency.
It’s difficult to deliver services and
keep competitive with infrastructure designed for a simpler, less complicated
time. During the era of client-server computing, most network traffic flowed
from the data center to the clients in what’s known as a north-south traffic
flow. Infrastructure. Software-defined networks (SDN) fit
Four ways to create an SDN
Create
a flexible, adaptive path forward solution, regardless of the SDN approach you
choose
The programmable
approach. Many
networking companies rely on a standards-based, programmable SDN approach that
eliminates any dependency on proprietary software. You can implement
programmable — as well as traditional and controller-based — networking
solutions on one common platform. Open Z and S series switches support the
Cumulus Networks Linux-based operating system for networking hardware, and networking
operating System, and others.
Data packet payload manipulation and Service deployment:
On-box
encryption and VPN, customized encryption algorithms, deep packet inspection,
application awareness requiring payload inspection, ability to inject packets into
a network stream Open Flow has no ability to instantiate a service directly on
a network element. Service examples include firewall, Wide Area Application
Services (WAAS), intrusion protection system (IPS) software, SDN Enabled
broadband network gate (BNG), video monitoring, etc.
The centralized-controller approach:The
Open Network Foundation, NEC and Big Switch Networks place control at the edge
of the network with SDN controllers that support multiple network switching and
routing devices. You can implement this approach with your choice of NEC and
Big Switch Networks joint solutions.
The virtualization/hypervisor approach. VMware, Midokura and Microsoft
use software-defined virtual switches to control the network — without
requiring SDN/Open flow in the switching hardware. You can implement this
approach with your choice of VMware, Microsoft and Midokura joint
solutions.
Cloud architectures
have become pervasive across data centers, enterprises, and communication
service providers, but the “cloud” is more than just architecture, it is
also an approach and a mindset. In today’s social, mobile world, cloud applications have to
scale dramatically and fail fast or succeed fast, and the new IT infrastructure
has to support these requirements.
Fifty five percent of
enterprises today use cloud computing, and more than sixty percent of
businesses expect to have external-facing applications in the cloud within the next two to three years.
