GDL OpenStack Community - Openstack Introduction

Editor's Notes

• #4: Business Drivers:Capacity planning (Involves ensuring that an organization has the right infrastructure, resources and services to support their business and customer base in the future)IT infrastructure be plannedEstimating usage load fluctuations.Balance peak usage requirements without unnecessary over-spending on IT infrastructure.Operating Overhead (Reducing the up-front cost of acquiring new IT infrastructure and the on-going cost of owning and maintaining said infrastructure)Actual cost of ownership needs to be consideredUnderutilized - Unpredictable usage requirementsThe administration demands can unnecessary increase operating costs(IT department itself more of a burden upon the organization)Operational Agility (The ability of a business to respond to change by being able to scale its IT resources)Responsiveness of an organization in the face of business change.Being able to scale its IT resourcesIT resources be more available and/or reliable
• #5: Technology Innovations:Grid Computing Technology (Way to provide computing resources on demand and on a pay-as-you go basis)"computing as a networked utility"You could plug into a pool of shared computing power"pay-as-you-go" computing and further formed the basis of "elasticity"Clustering Technology (Create a failover system that employs multiple similar IT resources together to provide greater availability and reliability)Back-end technology architectures that evolved in support of Web-based applications introduced load balancing, server farms, clustered servers, clustered databases.Virtualization Technology (Enables physical IT resources to provide multiple virtual images of themselves)It has enabled hardware owners to repeatedly leverage physical servers.Helped realize the notion of "server elasticity"(allowing one physical server to host a variable number of "virtual" servers).Key technology in modern cloud computing environments.
• #6: Terms:IT Resource - Physical or virtual IT-related artifact(physical server, software program, virtual server, service, storage device, network device)Virtualization - Physical IT resources to provide multiple virtual images of themselvesScaling in / Scaling out - Scaling represents the ability of the IT resource to gracefully handle increased or decreased usage demands.Cloud - Remote IT environment designed for the purpose of remotely provisioning IT resourcesOn-Premise - IT resource that is not remotely accessible via a cloud.Service - It's a software program that can be remotely invoked via a published technical interface.Cloud Service - Any remotely accessible IT resource is classified as a service.Service Agent - An event-driven program capable of transparently intercepting and processing messages sent to or from services.Characteristics:On-Demand Usage(the freedom to self-provision IT resources)Ubiquitous Access(widely accessible - support for a range of devices, transport protocols, interfaces, and security technologies.)Multi-tenancy and Resourcing Pooling.(IT resources shared by multiple users/tenants)Elasticity (ability of a cloud to gracefully and transparently scale IT resources)Measured Usage (Keep track of the usage of its IT resources by cloud consumers, pay for use monitoring mechanism)Resiliency (failover system)
• #7: Cloud delivery models Represents a specific combination of IT resources offered by a cloud provider. Infrastructure-as-a-Service(IaaS) - Provides a self-contained IT environment comprised of infrastructure-centric IT resources. Example AWSPlatform-as-a-Service(PaaS) - Provides a ready-made environment that comes with a set of pre-packaged products and tools. Example Salesforce.Software-as-a-Service(SaaS) - Represents a software product that exists as a shared cloud service offered by a cloud provider to cloud consumers. Example Office365
• #8: Cloud deployment models Represents a specific type of cloud environment, primarily distinguished by ownership and size. Public Cloud - It's publically accessible cloud environment owned by a third-party cloud provider.Community Cloud - It's either a public cloud with limited access to the members of a particular group.Private Cloud - It's privately owned and managed by a single organization for their internal customers.Hybrid Cloud - Two or more different cloud deployment models.
• #11: How I Explained REST to My Wifehttp://www.looah.com/source/view/2284