What is the Best Fit Algorithm for Memory Partitions?

In summary, Best fit operates on incoming processes one at a time, in the incoming order. For each process, it means choosing the smallest memory partition that the process will fit into. This means that for processes 21 and 5, they would go into memory partitions 30 and 10, respectively. For processes 47 and 45, they would go into memory partitions 60 and 60, respectively, as they are the smallest available partitions. There is no look ahead involved in the process.
  • #1
whitehorsey
192
0
1. If you had 10, 50, 20, 30, and 60 KB in order and wanted to work with these incoming processes 21, 47, 5, 45 KB find the best fit.


3. I know how to do 21 and 5 but for 47 and 45 I'm confused. Best fit says to produce the smallest left over hole. So, would I put 47 in 60 because it's smaller than 45 in 60?
(21 would go into 30 and 5 would go into 10)
 
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  • #2
Best fit operates on the incoming processes one at at time, in the incoming order. There's no look ahead involved. For each process, best fit means to choose the smallest memory partition that the process will fit into.
 
  • #3
rcgldr said:
Best fit operates on the incoming processes one at at time, in the incoming order. There's no look ahead involved. For each process, best fit means to choose the smallest memory partition that the process will fit into.

Thank You!
 

1. What is the "best fit" approach to memory partitioning?

The "best fit" approach to memory partitioning is a method used by operating systems to allocate memory to processes. It involves finding the smallest free partition that can accommodate the process, thus minimizing memory wastage.

2. How does the "best fit" algorithm work?

The "best fit" algorithm works by searching through the available memory partitions and selecting the one that is closest in size to the process that needs to be allocated memory. This ensures that the memory is used efficiently and minimizes fragmentation.

3. What are the advantages of using the "best fit" approach?

One of the main advantages of using the "best fit" approach is that it reduces memory wastage. It also allows for more efficient use of memory, as it minimizes fragmentation and can accommodate a larger number of processes. Additionally, it is a relatively simple and easy to implement algorithm.

4. Are there any drawbacks to using the "best fit" approach?

One potential drawback of using the "best fit" approach is that it can be slower compared to other memory allocation algorithms, such as "first fit" or "worst fit." This is because it involves searching through all the available partitions to find the best fit, which can be time-consuming.

5. How does the "best fit" approach compare to other memory partitioning methods?

The "best fit" approach is generally considered to be a good compromise between efficiency and speed. It is more efficient than "first fit" as it reduces fragmentation, but it may be slower due to the search process. It is not as efficient as "worst fit," but it is faster since it does not have to search for large partitions. Overall, the best approach will depend on the specific needs and priorities of the system.

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