Günther Gerlach

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written by gunther gerlach-2009

As web services technologies mature, and commercial-scale, service oriented architectures shift from early adoption to mainstream development, a new revolution of service orientation is emerging. Beyond the orchestration of web services in multi-party business processes, a dedicated treatment for procuring web services into different markets is coming into focus.

The first beneficiaries of open procurements of web services are ventures having successfully overcome the dotcom-burst such as Salesforce, StrikeIron, and GrandCentral. These companies leverage XML-based technology to consolidate enterprise application portfolios built by independent software developers for the small to medium markets. Their early successes are paving the way to long-anticipated Amazon/eBay-style marketplaces for web services.

Gunther Gerlach

written by gunther gerlach-2009

Service-oriented architecture (SOA) has gained mainstream acceptance as a strategy for consolidating and repurposing legacy applications to be combined with new applications in more dynamic environments, through self-contained, reusable, and configurable services. As fostered through the web services standards stack, services, once in place, can interoperate with other services, be composed into long-running business processes, spanning intra- and inter-organizational boundaries, and be procured through different business domains and market sectors. As web services are exposed and connected with one another, they give rise to service ecosystems.

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

written by gunther gerlach-2009

Amazon’s Elastic Compute Cloud (EC2) allows the imaging of servers and the use of web services to provision these images on specified virtual platforms. It currently allows a range of basic, to intermediate, to high-performance spec’ed platforms and these are priced on an hourly basis.

Using the Amazon Simple Storage Service (S3) a complete application environment can be provisioned from the stored images in a short period of time, used for a defined purpose and period, and then decommissioned.

 

The main challenges that remain for Cloud Computing

Gunther Gerlach

written by gunther gerlach-2009

Quick definition: Cloud Computing is an Internet based platform geographically distributed and developed to provide real-time scalable resources and provided “as a service” over the Internet to users who don’t need to have deep knowledge or expertise on technology infrastructure. The concept incorporates software as a service (SaaS), and other well-known technology trends.

Cloud computing services span a wide scope, from virtualized low-level computing and storage to full business services. Understanding the spectrum of cloud services and the characteristics of each service category is essential in determining when, where, how and why to apply cloud computing.

Gunther Gerlach

written by gunther gerlach-2009

Velocity is a measurement of how much the team gets done in an iteration (called as Sprint in Agile Scrum). Velocity is what actually got done in the last iteration not what is planned and is calculated by the number of story points done in a certain sprint.

In Scrum it is measure in Story points. Each feature in scrum is a story. A story has points. Points can be anything you come up with.

Examples are 1, 2, 4, 8 , 16

Gunther Gerlach