written by gunther gerlach-2009
I have talked about virtualization and also about Cloud Computing but, what options are available to implement cloud computing Infrastructure implementations? Well, that is simple!
Hardware technologies for virtualization (hypervisor)
Hypervisor Virtualization has a layer (usually a thin Linux kernel shown here as a hypervisor or standard OS) that is loaded directly on the bare server. To allocate hardware and resources to the virtual machines (VMs), all hardware on the server must be virtualized. The next layer up shows each chip, board, etc. that must be virtualized so that it can be assigned to the VMs. Once in the VM itself, there is a complete copy of an operating system and finally the application or workload.
Gunther Gerlach
EXECUTIVE LEADERSHIP: World-Class Development Organizations, Web-Services, E-Commerce, IT Operations, Scalable Cloud Computing, Tier-1 Systems.
Highly accomplished executive with 10+ years of experience directing high performance enterprise web-based solutions. Proven executive leader cultivating relationships at the SVP and C-level plus with the ability to train and lead cross-functional onsite and international teams leading initiatives being developed by up to 230 engineers driving the design and execution of critical components for Amazon global systems architecture and its Enterprise Elastic Computer Cloud (EC2) plus inter-dependent SAP integration solutions for DHL Express. Combines technical skills including proficiency in 12 programming languages with visionary business acumen to create strategic enterprise-wide alignment. Managed Budgets up to $22 MM. Entrepreneur successfully opened and directed a technology retail company. Trilingual: English, Spanish, Italian.
Gunther Gerlach
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
A user story describes desired functionality from the customer (user) perspective. A good user story describes the desired functionality, who wants it, and how and why the functionality will be used.
The INVEST model define a User Story as Independent, Negotiable, Valuable, Estimable, Small, Testable. Let’s see what each one means:
Independent - One user story should be independent of another (as much as possible). Dependencies between stories make planning, prioritization, and estimation much more difficult. Often enough, dependencies can be reduced by either combining stories into one or by splitting the stories differently.
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
