Cumulus Cloud Solution FAQ

Feel free to browse through our FAQ, hopefully you will find the anwser to your questions.


  • Q: What is Cloud Computing?
  • A: The NIST Definition of Cloud Computing

    Authors: Peter Mell and Tim Grance Version 15, 10-7-09 National Institute of Standards and Technology, Information Technology Laboratory

    “Cloud computing is a model for enabling convenient, on-demand network access to a shared pool of configurable computing resources (e.g., networks, servers, storage, applications, and services) that can be rapidly provisioned and released with minimal management effort or service provider interaction. This cloud model promotes availability and is composed of five essential characteristics, three service models, and four deployment models”.

  • Q: What are the Essential Characteristics of Cloud Computing ?
  • A: On-demand self-service. A consumer can unilaterally provision computing capabilities, such as server time and network storage, as needed automatically without requiring human interaction with each service’s provider.
    Broad network access.Capabilities are available over the network and accessed through standard mechanisms that promote use by heterogeneous thin or thick client platforms (e.g., mobile phones, laptops, and PDAs).

    Resource pooling. The provider’s computing resources are pooled to serve multiple consumers using a multi-tenant model, with different physical and virtual resources dynamically assigned and reassigned according to consumer demand. There is a sense of location independence in that the customer generally has no control or knowledge over the exact location of the provided resources but may be able to specify location at a higher level of abstraction (e.g., country, state, or datacenter). Examples of resources include storage, processing, memory, network bandwidth, and virtual machines.

    Rapid elasticity. Capabilities can be rapidly and elastically provisioned, in some cases automatically, to quickly scale out and rapidly released to quickly scale in. To the consumer, the capabilities available for provisioning often appear to be unlimited and can be purchased in any quantity at any time.
    Measured Service. Cloud systems automatically control and optimize resource use by leveraging a metering capability at some level of abstraction appropriate to the type of service (e.g., storage, processing, bandwidth, and active user accounts). Resource usage can be monitored, controlled, and reported providing transparency for both the provider and consumer of the utilized service.

  • Q: What are the three Service Models in Cloud Computing?
  • A: Cloud Software as a Service (SaaS). The capability provided to the consumer is to use the provider’s applications running on a cloud infrastructure. The applications are accessible from various client devices through a thin client interface such as a web browser (e.g., web-based email). The consumer does not manage or control the underlying cloud infrastructure including network, servers, operating systems, storage, or even individual application capabilities, with the possible exception of limited user-specific application configuration settings.
    Cloud Platform as a Service (PaaS). The capability provided to the consumer is to deploy onto the cloud infrastructure consumer-created or acquired applications created using programming languages and tools supported by the provider. The consumer does not manage or control the underlying cloud infrastructure including network, servers, operating systems, or storage, but has control over the deployed applications and possibly application hosting environment configurations.
    Cloud Infrastructure as a Service (IaaS). The capability provided to the consumer is to provision processing, storage, networks, and other fundamental computing resources where the consumer is able to deploy and run arbitrary software, which can include operating systems and applications. The consumer does not manage or control the underlying cloud infrastructure but has control over operating systems, storage, deployed applications, and possibly limited control of select networking components (e.g., host firewalls).


    Created by Sam Johnston, Creative Commons

  • Q: What are the Services proposed by Cumulus ?
  • A: We defined Cumulus as being a IaaS+ private cloud solution. Cumulus is a premium cloud infrastructure with dedicated and managed services.

    Created by Labgroup, all rights reserved.

  • Q: What are the four Deployment Models ?
  • A: Private cloud. The cloud infrastructure is operated solely for an organization. It may be managed by the organization or a third party and may exist on premise or off premise.
    Community cloud. The cloud infrastructure is shared by several organizations and supports a specific community that has shared concerns (e.g., mission, security requirements, policy, and compliance considerations). It may be managed by the organizations or a third party and may exist on premise or off premise.
    Public cloud. The cloud infrastructure is made available to the general public or a large industry group and is owned by an organization selling cloud services.
    Hybrid cloud. The cloud infrastructure is a composition of two or more clouds (private, community, or public) that remain unique entities but are bound together by standardized or proprietary technology that enables data and application portability (e.g., cloud bursting for load-balancing between clouds).
    Note: Cloud software takes full advantage of the cloud paradigm by being service oriented with a focus on statelessness, low coupling, modularity, and semantic interoperability.

  • Q: What are the main advantages of Cloud Computing ?
  • A: Based on a KPMG study made in 2010, the benefits from cloud computing are numerous. First of all, users can convert Capital Expenditure (CAPEX) – investments made in infrastructure – into Operating Expendicture (OPEX)- That lower the costs and offers more flexibility to businesses.

    cloud computing benefits

  • Q: What should I watch out for with Cloud Computing ?
  • A: The European Network and Information Security Agency (ENISA) released the most important features a user should look for when searching a cloud computing solution. As the security and legal issues, knowing where your provider is and where your data will be hosted.


    cloud computing benefits

    Discover more information on European Network and Information Security Agency (ENISA).
    Download ENISA’s Cloud Computing Security Risk Assessment (PDF).


Please, feel free to contact Labgroup for further information at +352 350222-999 or by email at