Multiple processor scheduling or multiprocessor scheduling focuses on designing the scheduling function for the system which is consist of 'more than one processor'. With multiple processors in the system, the load sharing becomes feasible but it makes scheduling more complex. As there is no policy or rule which can be declared as the best scheduling solution to a system … [Read more...] about Multiple Processor Scheduling
Threading Issues in OS
There are several threading issues when we are in a multithreading environment. In this section, we will discuss the threading issues with system calls, cancellation of thread, signal handling, thread pool and thread-specific data. Along with the threading issues, we will also discuss how these issues can be deal or resolve to retain the benefit of the multithreaded … [Read more...] about Threading Issues in OS
Structure of Page Table
Structure of page table simply defines, in how many ways a page table can be structured. Well, the paging is a memory management technique where a large process is divided into pages and is placed in physical memory which is also divided into frames. Frame and page size is equivalent. The operating system uses a page table to map the logical address of the page generated by CPU … [Read more...] about Structure of Page Table
Deadlock Characterization
Deadlock characterization describes the distinctive features that are the cause of deadlock occurrence. Deadlock is a condition in the multiprogramming environment where the executing processes get stuck in the middle of execution waiting for the resources that have been held by the other waiting processes thereby preventing the execution of the processes. In this content, … [Read more...] about Deadlock Characterization
Segmentation in OS
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)