Which of the following is not an advantage or disadvantage of using a cache for disk write operations?
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- Exactly what are the pros and cons of storing disk write operations in a cache?Select the WRONG statement relating to the properties of DRAM memories. (Select the WRONG statement; the statements not selected should be true) The bit line is kept at a voltage between high voltage and ground, during a WRITE operation. A DRAM row-read takes a long time, but once a row is read into a buffer, multiple back-to- back reads to the same row are much faster. Unlike SRAM reads, DRAM reads are "destructive". Memory locations not accessed for some time need to be refreshed periodically.Can you explain the pros and cons of storing disk writes in a cache?
- Please let me know if these are true or false! In multiprocessors with a shared physical main memory, an access to a word of main memory always takes about the same amount of time no matter which word is being accessed and by which processor: T/F? When reading data from a magnetic disk, the rotational latency increases linearly with the size of the request: T/F? SSD is faster to access than magnetic disk, but slower than DRAM main memory: T/F? The primary purpose of RAID is for data backups: T/F? Typically, data parallelism offers greater opportunities for achieving highly-parallel execution than does functional parallelism: T/F? In MIPS systems, one way to implement locks is with the MIPS test-and-set machine language instruction: T/F?There are many parameters that could be used to describe disk performance; among them are: number of bits per track disk capacity (in bits) number of disk surfaces rotational speed rotational latency transfer rate tracks per surface sectors per track blocks per track sectors per block seek time speed of disk arm block-read time number of blocks Some of these parameters are independent, and others are (approximately) linearly related. That is, doubling one doubles the other. Decide which of these parameters are linearly related. Then, select from the list below, the relationship that is true, to within a close approximation. Note: none of the statements may be true exactly, but one will always be much closer to the truth than the other three. Also note: you should assume all dimensions and parameters of the disk are unchanged except for the ones mentioned. a) If you double the number of sectors per block, then you double the number of blocks on the disk. b)…There are many parameters that could be used to describe disk performance; among them are: number of bits per track disk capacity (in bits) number of disk surfaces rotational speed rotational latency transfer rate tracks per surface sectors per track blocks per track sectors per block seek time speed of disk arm block-read time number of blocks Some of these parameters are independent, and others are (approximately) linearly related. That is, doubling one doubles the other. Decide which of these parameters are linearly related. Then, select from the list below, the relationship that is true, to within a close approximation. Note: none of the statements may be true exactly, but one will always be much closer to the truth than the other three. Also note: you should assume all dimensions and parameters of the disk are unchanged except for the ones mentioned. a) If you divide tracks into half as many blocks, then you double the read time for a block.…
- It is easy to explain how dynamic memory allocation works.How does the concept of "garbage collection" work in memory management within computing systems?Please refer to this textbook: “A. Silberschatz, P. B. Galvin and G. Gagne, “Operating System Principles,”7th Edition, John Wiley & Sons Inc., 2006.” And answer the following questions: Question12: Which disk schedualing algorithm is most vulnerable to starvation (a) SCAN. (b) Shortest Seek Time First (SSTF). (c) LOOK. (d) First Come, First Served (FCFS)
- What is the purpose of memory segmentation in the context of computer memory management?Describe a situation of a deadlock that can happen when more than 2 machines are involved in distributed memory programnming. How can you resolve it? (List the memory types in memory hierarchy and define what parameter increases or decreases in this hierarchy.