What assurance does the content authenticity feature of CAS provide?

The correct answer is C. Validity of stored content. CAS assures the genuineness of stored content. This is achieved by generating a unique content address for each object and validating the content address for stored objects at regular intervals. Content authenticity is assured because the address assigned to each object is as…

Storage Systems

Question

Options

AStoring only one instance of content
BStored content is protected against erasure
CValidity of stored content
DThere are always multiple copies

How the community answered

(29 responses)

A
14% (4)
B
3% (1)
C
76% (22)
D
7% (2)

Explanation

CAS assures the genuineness of stored content. This is achieved by generating a unique content address for each object and validating the content address for stored objects at regular intervals. Content authenticity is assured because the address assigned to each object is as unique as a fingerprint. Every time an object is read, CAS uses a hashing algorithm to recalculate the object's content address as a validation step and compares the result to its original content address. If the object fails validation, CAS rebuilds the object using a mirror or parity protection scheme.

Topics

#CAS#content authenticity#data integrity#content addressable storage

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