In UNIX, cached disk blocks are managed by the kernel and referred to as -
In UNIX, cached disk blocks are managed by the kernel and referred to as -
The correct option is C Buffer cache
In UNIX, cached disk blocks are managed by
the kernel and referred to as buffer cache.
The kernel could read and write the file
directly from the hard disk and put it in memory but the response time and
throughput will be very low in this case because of disks sow data transfer
speed.
To minimize the frequency of disk
usage/access the kernel keeps a buffer to store the recently accessed files
and/or frequently accessed files. This buffer is called the buffer cache.
When the process want to read a file the
kernel attempts to read this file in the buffer cache, if the data is found in
the buffer cache the data/file is sent to the process. If the file is not found
in the buffer cache then the file is read from the disk and then kept in the
buffer cache so that it can be made available to the process.
In UNIX, cached disk blocks are managed by the kernel and referred to as buffer cache.
The kernel could read and write the file directly from the hard disk and put it in memory but the response time and throughput will be very low in this case because of disks sow data transfer speed.
To minimize the frequency of disk usage/access the kernel keeps a buffer to store the recently accessed files and/or frequently accessed files. This buffer is called the buffer cache.
When the process want to read a file the kernel attempts to read this file in the buffer cache, if the data is found in the buffer cache the data/file is sent to the process. If the file is not found in the buffer cache then the file is read from the disk and then kept in the buffer cache so that it can be made available to the process.
