CS435 Highlighted Handouts by Gateway

physical server.

Module No – 116: Resource Cluster Mechanism:

• The Cloud promises virtually unlimited IT resources.
• It is obvious that the Cloud IT resources are provisioned from multiple physical servers located in a single or multiple data center/s.
• The resource cluster mechanism is used to group multiple IT resources so that they can be used as a single IT resource.
• This increases the computing capacity, load balancing capacity and availability of the clustered IT resources.
• High speed communication links are used to connect the clustered IT resources for: o Workload distribution o Task scheduling o Data sharing o System synchronization
• Server clusters may or may not have a shared storage.
• Common types: o Consisting of physical or virtual servers. The virtualized clusters support the migration of VMs for scaling and load balancing. These IT resources are (although virtualized) but can not be provided through a single HA o Database Cluster: Is used to keep redundant implementation of databases. It has features to synchronize the data across all the redundant instances. ▪ Useful for active-active and active-passive failover systems. o Large Dataset Clusters: This type of cluster is used to partition and distribute large datasets without affecting the data integrity or computing accuracy. ▪ Each node processes workloads without any need to depend/communicate with other nodes.
• Additional types: o o Implements a load balancer mechanism (discussed before). Implements a failover system (discussed before).

Module No – 117:

• Multi-Device Broker: This mechanism is used to transform the messages (received from

to the Cloud service. o The response messages from Cloud service are intercepted and transformed back to the device specific format before conveying to the devices through the multi-device broker mechanism.

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• State Management Database: It is a device used to temporarily store the state data of software programs. o State data can be (for example) the configuration and number of VMs being employed to support a user subscription to a PaaS instance. o In this way, the programs do not use the RAM for state-caching purposes and thus the amount of memory consumed is lowered. heterogenous devices of Cloud consumers ) into a standard format before conveying them

mostly useful hota hn active to active and passive to passive failure mi

large data set ko partition kr dyty hn apki app jlid sy develope ho jti hen

heterogenous devices jo ky cloud ki servicesko use kr rae hn unhy trnsform kr dyta hn standard format mi bkaz yh easily convey hoskti hn cloud py used online portals. o The services can then be in a “stateless” condition. o For example, a PaaS instance (ready-made environment) requires three VMs. If user pauses activity, the state data is saved in state management software and the underlying infrastructure is scaled in to a single VM. o When the user resumes the activity, the state is restored by scaling out on the basis of data retrieved from state management database.

Lesson No. 25 · CLOUD MANAGEMENT · Module No – 118: Remote Administration System

• It is a Cloud mechanism which provides the APIs and tools to the providers to develop and
• These portals also provide some administrative controls to the Cloud consumers as well.
• Usage and Administration Portal: o Management controlling of Cloud IT resources o IT resources usage reports Self-Service Portal: o The consumer can look at and choose various Cloud services o The chosen services/package is submitted to Cloud provider for automated provisioning
• The remote administration console can be used to: o Configure and setting cloud services o Provision and releasing IT resources for on-demand usage o Monitor cloud service status, usage and performance o QoS and SLA fulfillment monitoring o IT-resource leasing cost and usage fee management o Managing user accounts, security credentials, authorization and access control o The remote administration console can be used to: o Capacity planning
• If allowed, a Cloud consumer can create its own front-end application using API calls of remote administration system.

Module No – 119: Resources Management System

• Utilizes the virtual infrastructure manager (VIM) for creating and managing the virtual IT resources.
• Typical tasks include: o Managing the templates used to initialize the VMs o Allocating and releasing the virtual IT resources o Starting, pausing, resuming and termination of virtual IT resources in response to allocation/release of these resources

like application or software bni hoti hn apny just work krna hota hn