What is scheduling in multimedia?

What is scheduling in multimedia?

Definition:Streaming media servers employ the scheduling of available disk bandwidth to guarantee a continuous display of streaming media and to maximize the throughput by minimizing the wasteful work of disk drives.

What are the different types of disk scheduling?

Disk Scheduling Algorithms

• FCFS scheduling algorithm.
• SSTF (shortest seek time first) algorithm.
• SCAN scheduling.
• C-SCAN scheduling.
• LOOK Scheduling.
• C-LOOK scheduling.

What are the disk scheduling policies?

Some well-known disk scheduling methods are: (i) FCFS. (ii) Shortest Seek Time First (SSTF). (iii) SCAN and Cyclical SCAN (CSCAN). The latter moves the disk arm to its beginning point after each SCAN so that requests at all disk cylinders are treated symmetrically.

What is scan EDF scheduling?

WRR- SCAN is a scheduled algorithm based on rate, otherwise SCAN-EDF is a type of algorithm based on priority. SCAN-EDF serves to non periodic tasks only if there are no current real time periodic tasks. This causes a dependence of non periodic throughput tasks on real time tasks workload.

Which disk scheduling is the best?

With the classical approach of disk scheduling algorithm, few algorithms like SSTF and LOOK will be the most efficient algorithm compared to FCFS, SCAN, C-SCAN and C- LOOK disk scheduling algorithm with respect to these parameters.

Why is disk scheduling needed?

Disk scheduling is done by operating systems to schedule I/O requests arriving for the disk. Disk scheduling is important because: Multiple I/O requests may arrive by different processes and only one I/O request can be served at a time by the disk controller.

Which is best disk scheduling algorithm?

the most widely known algorithm for scheduling the request is SSTF or LOOK algorithm. the main goal of this and most of other disk scheduling algorithm is to reduce the number of disk head movement thereby reducing the seek time. To achieve this, we should have a fast access time and large disk bandwidth.

What is the purpose of scan EDF algorithm?

SCAN-EDF serves to non periodic tasks only if there are no current real time periodic tasks. This causes a dependence of non periodic throughput tasks on real time tasks workload.