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1 describe some advantages and disadvantages of using ssds as a caching tier and as a disk-drive replacement compared
write a program that implements the fifo lru and optimal pagereplacement algorithms presented in this chapter first
repeat exercise 322 this time using windows shared memory in particular using the producer-consumer strategy design two
1 is disk scheduling other than fcfs scheduling useful in a single-user environment explain your answer2 explain why
it is sometimes said that tape is a sequential-access medium whereas a magnetic disk is a random-access medium in fact
1 could a raid level 1 organization achieve better performance for read requests than a raid level 0 organization with
compare the throughput achieved by a raid level 5 organization with that achieved by a raid level 1 organization for
consider the parameter used to define the working-set window in the working-set model when is set to a small value
consider a file currently consisting of 100 blocks assume that the filecontrol block and the index block in the case of
1 give an example of an application that could benefit from operating system support for random access to indexed
1 some systems automatically open a file when it is referenced for the first time and close the file when the job
1 the open-file table is used to maintain information about files that are currently open should the operating system
1 what problems could occur if a system allowed a file system to be mounted simultaneously at more than one location2
one problem with contiguous allocation is that the user must preallocate enough space for each file if the file grows
1 how do caches help improve performance why do systems not use more or larger caches if they are so useful2 why is it
consider a file system that uses a modifed contiguous-allocation scheme with support for extents a file is a collection
1 contrast the performance of the three techniques for allocating disk blocks contiguous linked and indexed for both
1 some file systems allow disk storage to be allocated at different levels of granularity for instance a file system
consider a file system on a disk that has both logical and physical block sizes of 512 bytes assume that the
1 consider a file system that uses inodes to represent files disk blocks are 8 kb in size and a pointer to a disk block
1 assume that in a particular augmentation of a remote-file-access protocol each client maintains a name cache that
consider the following backup schemebull day 1 copy to a backup medium all files from the diskbull day 2 copy to
assume you work for an organization that develops database products for individuals and small businesses this
calculate the dollar rates of return on the following assetsa a painting whose price rises from 200000 to 250000 in a
you are thinking of opening a small copy shop it costs 5000 to rent a copier for a year and it costs 003 per copy to