Which operation is represented in the exhibit?
A. Write-back Cache
B. Read Cache Miss
C. Write-through Cache
D. Read Cache Hit
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Which operation is represented in the exhibit?
A. Write-back Cache
B. Read Cache Miss
C. Write-through Cache
D. Read Cache Hit
|
Download Printable PDF. VALID exam to help you PASS. |
|
…Write-back cache: Data is placed in cache and an acknowledgment is sent to the host immediately. Later, data from several writes are committed (de-staged) to the disk. Write response times are much faster because the write operations are isolated from the mechanical delays of the disk. However, uncommitted data is at risk of loss if cache failures occur…
…If the requested data is not found in cache, it is called a cache miss and the data must be read from the disk. The back end accesses the appropriate disk and retrieves the requested data. Data is then placed in cache and fi nally sent to the host through the front end. Cache misses increase the I/O response time… (Information Storage and Management 2nd ed.)
So, answer is B.
answer is B!