The concept of segmentation in os is similar to paging which is used for memory management. Segmentation divides the user program and the data associated with the program into the number of segments. Well, there is a difference between paging and segmentation in paging each page has an equivalent fixed size whereas segments are of variable size. The segmentation maps to the … [Read more...] about Segmentation in OS
Semaphore in Operating System
Semaphore in OS is an integer value that indicates whether the resource required by the process is available or not. The value of a semaphore is modified by wait() or signal() operation where the wait() operation decrements the value of semaphore and the signal() operation increments the value of the semaphore. The wait() operation is performed when the process wants to … [Read more...] about Semaphore in Operating System
Thread Libraries in OS
Thread Libraries has a collection of functions that useful in creating and controlling threads. Programmers can access these thread libraries using an application programming interface (API). Thread libraries can be the user level library or kernel level library. If the thread library is implemented at the userspace then code and data of the thread library would reside in … [Read more...] about Thread Libraries in OS
Principles of Cloud Computing
Studying principles of cloud computing would help you in the adoption and use of cloud computing. These principles unfold the opportunities for cloud customers to move their computing to the cloud and for a cloud vendor to deploy a successful cloud environment. National Institute of Standards and Technology (NIST) stated that cloud computing offers worldwide, and on-demand … [Read more...] about Principles of Cloud Computing
Security Challenges in Cloud Computing
The fundamental security challenges in cloud computing are to overcome security threats in order to fully utilize these new computing standards. Though cloud computing is a powerful and effective technology it has some security-related challenges. Exposing your sensitive and confidential data on the cloud can put your data at a risk. Though cloud services ensure the security … [Read more...] about Security Challenges in Cloud Computing
Identity as a Service (IDaaS)
Identity as a service (IDaaS) provides IAM (Identity and Access Management) service to the user over the cloud on a subscription basis just like other cloud services. In short, the IDaaS ensures that the authorized user is authenticated to access the resources of the company. The user can be the employee of the company, customer or any third party related to the company. IDaaS … [Read more...] about Identity as a Service (IDaaS)
Data Privacy in Cloud Computing
Data privacy in cloud computing allows collecting, storing, transferring and sharing the data over the cloud without putting the privacy of personal data at a risk. Many times customer even does not have knowledge about how their personal information over the clouds is processed. With the increasing popularity of the cloud, data privacy is becoming a crucial factor in cloud … [Read more...] about Data Privacy in Cloud Computing
Federated Cloud
Federated cloud is a seamless environment formed by connecting the cloud environment of two or more cloud service provider using a common standard. Federated cloud integrates heterogeneous cloud environment such as community cloud, public cloud, and private cloud in order to scale up the resources and services for the users. In this section, we will discuss federation in the … [Read more...] about Federated Cloud
Software as a Service (SaaS)
Software as a service (SaaS) offers a subscription of cloud-based software applications to the user over the internet. SaaS users do not have to indulge in the diligence of purchasing the software along with the infrastructure on which the application will be installed and that is required to run the application's logic. SaaS has gained popularity as technologies supporting … [Read more...] about Software as a Service (SaaS)
Platform as a Service (PaaS)
Platform as a service (PaaS) is a cloud service where the cloud vendor provides hardware and software that forms the platforms on his self-owned infrastructure to the customer. The PaaS vendor offers this service to its customer on the consumption-based pricing model. Using the platform provided by the PaaS vendors the customer can develop and deploy their own software and … [Read more...] about Platform as a Service (PaaS)