Selection of disk scheduling algorithm is influenced by the file allocation method, if contiguous file allocation is choosen, then
FCFS
is best suitable, because the files are stored in contiguous blicks and there will be limited head movements required.
Which disk scheduling algorithm is best and why?
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.
What is the most used scheduling algorithm?
Generally speaking, each algorithm has its own advantages and disadvantages.
The FIFO scheduling algorithm
is still the most common one due to its simplicity, which is suitable for massive data processing. However, it ignores the different requirements of different type of applications.
Which disk scheduling algorithm is best throughput?
SSTF disk scheduling algorithm
has better throughput than FCFS disk scheduling algorithm but some requests may be delayed for a long time if lots of closely situated requests arrive just after it.
Which algorithm is better SSTF or look?
| LOOK SCHEDULING ALGORITHM SSTF SCHEDULING ALGORITHM | 1. The performance of LOOK is better than SSTF. SSTF lags in performance. | 2. LOOK results in increased total seek time. It reduces total seek time as compared to LOOK. |
|---|
Which disk scheduling algorithm is used in Windows?
3 Answers. Windows uses
a round-robin technique with a multi-level feedback queue
for priority scheduling ever since NT, Though in Vista there were some smart heuristic improvements to ensure that some processes, such as the disk defragmenter, are at a lower priority in order to not interfer with foreground processes.
What are the 5 scheduling types?
- Appointment scheduling software allows retailers to offer their customers a fast, simple and engaging way to book appointments for service in-store or online. …
- 1) Time-slot scheduling. …
- 2) Wave scheduling. …
- 3) Wave scheduling + walk-in. …
- 4) Open booking.
Which is better FCFS or SJF?
| First Come First Served (FCFS) Shortest Job First (SJF) | FCFS is non preemptive in nature. SJF is also non-preemptive but its preemptive version is also there called Shortest Remaining Time First (SRTF) algorithm. |
|---|
Which is better SJF or SRTF?
| Shortest Job First: Shortest Remaining Job First: | It is a non-preemptive algorithm. It is a preemptive algorithm. | It involves lesser number of context switching. It involves higher number of context switching. |
|---|
What are the disadvantages of FCFS scheduling?
Disadvantages: This scheduling method is
nonpreemptive, that is
, the process will run until it finishes. Because of this nonpreemptive scheduling, short processes which are at the back of the queue have to wait for the long process at the front to finish. Throughput is not efficient.
What is difference between scan and FCFS disk scheduling algorithm?
| Sr.No. FCFS Disk Scheduling Algorithm SCAN Disk Scheduling Algorithm | 3. FCFS algorithm gives the lowest throughput among all the disk scheduling algorithms. SCAN algorithm has a better throughput than FCFS scheduling algorithm. |
|---|
What is a disadvantage of the SSTF scheduling algorithm?
What is a disadvantage of the SSTF scheduling algorithm? …
SSTF may cause starvation of some requests
. If a continual stream of requests arrives near one another, a request of a cylinder far away from the head position has to wait indefinitely.
What is starvation OS?
Starvation is the problem that
occurs when high priority processes keep executing and low priority processes get blocked for indefinite time
. In heavily loaded computer system, a steady stream of higher-priority processes can prevent a low-priority process from ever getting the CPU.
What is FCFS disk scheduling algorithm?
FCFS is the
simplest disk scheduling algorithm
. As the name suggests, this algorithm entertains requests in the order they arrive in the disk queue. The algorithm looks very fair and there is no starvation (all requests are serviced sequentially) but generally, it does not provide the fastest service.
What are the different types of disk scheduling algorithms?
- FCFS scheduling algorithm.
- SSTF (shortest seek time first) algorithm.
- SCAN scheduling.
- C-SCAN scheduling.
- LOOK Scheduling.
- C-LOOK scheduling.
How many scheduling algorithms are there?
Six types
of process scheduling algorithms are: First Come First Serve (FCFS), 2) Shortest-Job-First (SJF) Scheduling, 3) Shortest Remaining Time, 4) Priority Scheduling, 5) Round Robin Scheduling, 6) Multilevel Queue Scheduling.
