xiv Software Networks
The use of Cloud services has meant a significant increase in the data
rates being sent over the networks. Indeed, processing is now done
centrally, and both the data and the signaling must be sent to the Cloud
and then returned after processing. We can see this increase in data rate
requirement by examining the market of Ethernet ports for datacenters.
Figure I.5 plots shipments of 1 Gbps Ethernet ports against those of
10 Gbps ports. As we can see, 1 Gbps ports, which are already fairly fast,
are being replaced by ports that are ten times more powerful.
Figure I.5. The rise in power of Ethernet ports for datacenters
The world of the Cloud is, in fact, rather diverse, if we look at the
number of functions which it can fulfill. There are numerous types
of Clouds available, but three categories, which are indicated in
Figure I.6, are sufficient to clearly differentiate them. The category
which offers the greatest potential is the SaaS (Software as a Service)
cloud. SaaS makes all services available to the user– processing,
storage and networking. With this solution, a company asks its Cloud
provider to supply all necessary applications. Indeed, the company
subcontracts its IT system to the Cloud provider. With the second
solution – PaaS (Platform as a Service) – the company remains
responsible for the applications. The Cloud provider offers a complete
platform, leaving only the management of the applications to the
company. Finally, the third solution – IaaS (Infrastructure as a
www.it-ebooks.info
The use of Cloud services has meant a significant increase in the data
rates being sent over the networks. Indeed, processing is now done
centrally, and both the data and the signaling must be sent to the Cloud
and then returned after processing. We can see this increase in data rate
requirement by examining the market of Ethernet ports for datacenters.
Figure I.5 plots shipments of 1 Gbps Ethernet ports against those of
10 Gbps ports. As we can see, 1 Gbps ports, which are already fairly fast,
are being replaced by ports that are ten times more powerful.
Figure I.5. The rise in power of Ethernet ports for datacenters
The world of the Cloud is, in fact, rather diverse, if we look at the
number of functions which it can fulfill. There are numerous types
of Clouds available, but three categories, which are indicated in
Figure I.6, are sufficient to clearly differentiate them. The category
which offers the greatest potential is the SaaS (Software as a Service)
cloud. SaaS makes all services available to the user– processing,
storage and networking. With this solution, a company asks its Cloud
provider to supply all necessary applications. Indeed, the company
subcontracts its IT system to the Cloud provider. With the second
solution – PaaS (Platform as a Service) – the company remains
responsible for the applications. The Cloud provider offers a complete
platform, leaving only the management of the applications to the
company. Finally, the third solution – IaaS (Infrastructure as a
www.it-ebooks.info