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Cloud Computing Final

Terms in this set (22)

Cluster
A group of independent IT resources that are interconnected and work as a single system.
How does grid computing differ from cluster?
Grid systems are much more loosely coupled and distributed. Grid computing systems can involve computing resources that are heterogeneous and geographically dispersed.
Middle tier of grid computing contains:
Load balancing logic, failover controls, and autonomic configuration management.
The primary business drivers that exposed the need for cloud computing and led to its formation include ______________.
Capacity planning, cost reduction, and organizational agility.
The primary technology innovations that influenced and inspired key distinguishing features and aspects of cloud computing include ___________.
Clustering, grid computing, and traditional forms of virtualization.
Specialized variations of cloud delivery models
Storage - a.a.s
Database
Security
Communication
Integration
Testing
Process
IaaS
A self-contained IT environment comprised of infrastructure-centric IT resources that can be accessed and managed via cloud serivce-based interfaces and tools.
IaaS environment contains:
Hardware, network connectivity, operating systems, and other "raw" IT resources.
General purpose of an IaaS environment:
To provide cloud consumers with a high level of control and responsibility over its configuration and utilization.
Virtual servers are leased by specifying server hardware requirements such as:
Processor capacity, memory, and local storage space
PaaS
Pre-defined "ready-to-use" environment typically comprised of already deployed and configured IT resources.
PaaS relies on (ad is primarily defined by):
The usage of a ready-made environment that establishes a set of pre-packaged products and tools used to support the entire delivery lifecycle of custom applications.
Common reasons a cloud consumer would use and invest in a PaaS environment include:
The cloud consumer wants to extend on-premise environments into the cloud for scalability and economic purposes.

The cloud consumer uses the ready-made environment to entirely substitute an on-premise environment.

The cloud consumer wants to become a cloud provider and deploys its own cloud services to be made available to other external cloud consumers.
Hard Disk Arrays
Inherently divide and replicate data among multiple physical drives, and increase performance and redundancy by including spare disks.
Hard Disk Arrays technology is implemented by:
Using redundant arrays of independent disks (RAID) schemes, which are typically realized through hardware disk array controllers.
I/O Caching
Performed through hard disk array controllers, which enhance disk access times and performance by data caching.
Hot-Swappable Hard Disks
Can be safely removed from arrays without requiring prior powering down
Storage Virtualization
Realized through the use of virtualized hard disks and storage sharing.
Fast Data Replication Mechanisms
Includes snapshotting - saving a virtual machines memory into a hypervisor-readable file for future reloading, and volume cloning - copying virtual or physical hard disk volumes and partitions.
Storage Area Network (SAN)
Physical data storage media are connected through a dedicated network and provide block-level data storage access using industry standard protocols, such as SCSI.
Network Attached Storage (NAS)
Hard drive arrays are contained and managed by this dedicated device, which connects through a network and facilitates access to data using file-centric data access protocols like the Network File System or Server Message Block.
NAS, SAN and other storage systems provide:
Fault tolerance through controller redundancy, cooling redundancy, and hard disk arrays that use RAID storage technology.
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