written by gunther gerlach-2009
Evolving application architectures just as P have shown that cloud computing is a natural extension of current trends and best practices, the same is true when viewing cloud computing from an architectural perspective. Again, cloud computing is nothing new, yet in its implementation, it changes everything that we do.
Changing application designs In the past, applications were built to handle larger workloads through vertical scaling. Put more processors and memory on a mail server to handle a larger volume of traffic. Scale up a database server to increase throughput. Run high-performance computing jobs on a supercomputer.
Gunther Gerlach
written by gunther gerlach-2009
Cloud computing can describe services being provided at any of the traditional layers from hardware to application. In practice, cloud service providers tend to offer services that can be grouped into three categories: Software as a Service, Platform as a Service, and Infrastructure as a Service. These categories group together the various layers, with some overlap.
Software as a service (SAAS)
Software as a Service features a complete application offered as a service on demand. A single instance of the software runs on the cloud and services multiple end users or client organizations.
Gunther Gerlach
written by gunther gerlach-2009
There are many considerations for cloud computing architects to make when moving from a standard enterprise application deployment model to one based on cloud computing. There are public and private clouds that offer complementary benefits, there are three basic service models to consider (Public, private, and hybrid clouds), and there is the value of open APIs versus proprietary ones.
models: Public, private, and hybrid clouds
Organizations can choose to deploy applications on public, private, or hybrid clouds, each of which has its trade-offs. Public clouds are typically “out there” on the Internet and private clouds are typically located on premises, a private cloud might be hosted at a co-location facility as well.
Gunther Gerlach
written by gunther gerlach-2009
Cloud computing increase the velocity with which applications are deployed, and lower costs, but it doesn’t increase systems performance over the traditional architecture. Cloud computing compile different facets, including the server, storage, network, and virtualization technology that drives cloud computing environments to the software that runs in virtual appliances that can be used to assemble applications in minimal time. Cloud Computing definitely transforms the way we design, build, and deliver applications, and the architectural considerations that enterprises must make when adopting and using cloud computing technology.
Gunther Gerlach
written by gunther gerlach-2009
Everyone has an opinion on what is cloud computing. It can be the ability to rent a server or a thousand servers and run a geophysical modeling application on the most powerful systems available anywhere. It can be the ability to rent a virtual server, load software on it, turn it on and off at will, or clone it ten times to meet a sudden workload demand. It can be storing and securing immense amounts of data that is accessible only by authorized applications and users. It can be supported by a cloud provider that sets up a platform that includes the OS, Apache, a MySQL database, Perl, Python, and PHP with the ability to scale automatically in response to changing workloads.
Gunther Gerlach
written by gunther gerlach-2009
Virtual servers in the cloud model. Basically they are providing Infrastructure as a Service. If you need to run your application, you can go to their site, configure your own server with your required configuration and software libraries and they will generate a server on the fly for you! Basically all this magic has come about thanks to virtualization technologies which allow you to create software servers independent of the hardware infrastructure running them. These VMs can be scaled and migrated depending on the need.
Gunther Gerlach
